【Guodun Information】Progress of quantum science and technology at home and abroad in February 2023

【Editor's Note】

Magnificent edifices are always made up of many large and small cornerstones and pillars. In the blueprint of quantum interconnection, cutting-edge technology is still constantly building better cornerstones, from theory to experiment, from high-precision devices to integrated devices, from key distribution networks to quantum computing networks... Thank you for your attention to Science and Technology Shield Quantum Technology Co., Ltd. and quantum information technology, we tried our best to search mainstream websites and journals at home and abroad, and extracted some scientific and technological industry trends and cutting-edge research results with high relevance and importance in the field for readers to quickly understand.

Headlines in this issue

01【Quantum computing makes exploratory breakthroughs in a number of fault-tolerant technologies】

After quantum computing achieves "superiority", fault-tolerant computing - achieving highly reliable "logical" qubits has become the core task of quantum computing towards practical use. Compared with the current state of technology, to achieve fault-tolerant computing, on the one hand, it is necessary to continue to greatly reduce the error rate of physical qubits, and on the other hand, it is necessary to use multiple physical bits to ensure the error correction technology of one logical bit.

This month, a number of breakthroughs were made in related technologies, including: Google's quantum AI team achieved superconducting qubit performance for the first time to overcome new errors when scaling up, and experiments demonstrated that the error rate can be reduced when scaling the surface code "logical" bit scale; Hughes Research Lab designed a manipulation quantum dot spin method based on spin ultra-fine interaction without injecting RF signals, which avoids correlation errors caused by manipulation methods and provides a new method for the manipulation of fault-tolerant quantum computing. Researchers at the University of New South Wales and other universities have also designed a manipulation quantum dot spin method based on spin ultra-fine interaction without external magnetic field, which provides support for improving the scalability of the system.

Original link:

For technical details, see Frontiers in Science and Technology.

Policies and strategies

/ Domestic /

01【The Central Committee of the Communist Party of China and the State Council issued the "Outline for the Construction of a Quality Power", breaking through quantized measurement technology]

Recently, the Central Committee of the Communist Party of China and the State Council issued the "Outline for the Construction of a Quality Power", which proposes to implement quality infrastructure capacity improvement actions and break through the key technologies of quantum measurement and flat measurement value transfer. (Source: Official website of the Central People's Government of China)

Original link:

http://www.gov.cn/zhengce/2023-02/06/content_5740407.htm

02【Four provincial capitals in the middle reaches of the Yangtze River signed "three-year plan" to strengthen cooperation in large-scale application of quantum communication networks]

On February 21, the four provincial capitals of Wuhan, Changsha, Hefei and Nanchang, together with 12 observer cities, signed the Action Plan for Cooperation among Capital Cities of the Yangtze River Midstream City Cluster (2023-2025) and Key Cooperation Matters of the Yangtze River Midstream City Cluster in 2023. The document proposes to strengthen the large-scale application and cooperation of quantum communication networks, and promote the construction of metro and intercity quantum communication networks in the middle reaches of the Yangtze River city agglomeration by combining the national wide-area quantum secure communication backbone network and the metro networks of Wuhan, Hefei and other places. Strengthen the construction and exchange of quantum communication networks, combine the completed quantum communication networks, and accelerate the pilot demonstration application of quantum communication technology in the fields of information communication, finance, government affairs, electric power, industrial Internet, Internet of Things, Internet of Vehicles, and big data in the middle reaches of the Yangtze River. (Source: Hefei Evening News)

Original link:

https://newspaper.hf365.com/hfwb/pc/content/202302/22/content_381430.html

03【2023 Beijing Municipal Government Work Report Key Task List Released, Advanced Layout of Quantum Technology】

Recently, Beijing issued the "List of Key Tasks in the 2023 Municipal Government Work Report". These include introducing measures to strengthen the overall management of world-class new R&D institutions, expand diversified investment channels, and strive to achieve more innovative application results in artificial intelligence, blockchain, quantum information, life sciences, cybersecurity and other fields; Accelerate the promotion of new benchmarking projects such as Internet 3.0, and advance the layout of quantum science and technology, algorithm innovation and other technologies. (Source: Beijing Municipal People's Government official website)

Original link:

http://www.beijing.gov.cn/zhengce/zhengcefagui/202301/t20230131_2909785.html

04【Shenzhen promotes the research and development of cryptography, quantum technology and other security technologies】

On February 4, the Shenzhen Fintech Special Development Plan (2023-2025) was officially released. It is proposed to promote independent innovation and research and development of security technologies represented by cryptography technology, quantum technology, Internet of Things security technology, etc., and expand the application of encryption technology in key areas such as identity authentication, network security, and anti-fraud. (Source: Shenzhen Local Financial Supervision Bureau)

Original link:

http://www.jr.sz.gov.cn/sjrb/xxgk/ghjh/zxgh/content/post_10409782.html

/ International /

01【EU releases report on the development of quantum technology flagship program in the first three years】

Recently, the European Commission released a report on the first three years of the quantum technology flagship program. The report reviews the successful outcomes and concrete achievements of the flagship quantum research project and summarizes key lessons learned at the start of the next phase of the flagship program.

Since 2016, the EU has provided more than €175 million for European quantum research in funding the flagship programme and QuantERA, which supports quantum research in 31 European countries. Subsequently, under the Horizon Europe, the European Commission will continue to support flagship projects for the period 2021-2027 with support funds of at least 50 billion euros. (Source: European Commission website)

Original link:

https://digital-strategy.ec.europa.eu/en/news/quantum-tech-flagship-ramp-phase-report

02[Germany launches Quant-ID project: ensuring quantum-secure identity]

News on February 6, in order to resist the attack of quantum computing on classical encryption, Quant-X Secure Cryptography Company, Fraunhofer Institute for Optoelectronic Microsystems, MTG AG and the University of Regensburg jointly launched the Quant-ID project to research and develop new methods and systems for long-term cryptographic security based on quantum random numbers and post-quantum cryptography. (Source: website of the German Federal Ministry of Education and Research)

Original link:

https://www.forschung-it-sicherheit-kommunikationssysteme.de/projekte/quant-id

03【National Science Foundation grants $5 million to quantum information science and engineering program】

On February 9, with a $5 million grant from the National Science Foundation (NSF), the University of Arkansas Pine Bluff (UAPB) will lead a collaboration with two other campuses of the University of Arkansas to establish a quantum information science and engineering program. The NSF-funded project, called QuAPB, will be built at Pine Bluff and become the first quantum center in the region of the United States for integrated research and education of quantum materials and devices that integrate quantum photonics. (Source: UAPB website)

Original link:

https://uapbnews.wordpress.com/2023/02/09/uapb-leads-a-5-million-grant-from-nsf-for-quantum-information-science-and-engineering-qise-program/

04 [The two departments of the United States set up a "disruptive technology strike group" to protect quantum computing and other technologies]

On February 16, the U.S. Department of Justice and Commerce announced the creation of a "disruptive technology strike group" to protect U.S. advanced technology from unlawful access and exploitation by U.S. adversary countries. The statement mentioned that the adversary countries include China, Iran, Russia and North Korea, and the adversary seeks technologies related to supercomputing and exascale computing, artificial intelligence, advanced manufacturing equipment and materials, quantum computing and biological sciences. (Source: U.S. Department of Justice website)

Original link:

https://www.justice.gov/opa/pr/justice-and-commerce-departments-announce-creation-disruptive-technology-strike-force

05 [Israel cooperates with the United States to develop the next generation of combat tools using quantum technology]

On February 20, Israel's largest defense company, Aerospace Industries, is working to strengthen cooperation with U.S. defense-related agencies to seek to develop future-oriented technologies. According to Israeli defense sources, intergovernmental discussions on technical cooperation include quantum computing in combat systems, kinetic killing ballistic interception systems, etc. (Source: Breaking Defense magazine)

Original link:

https://breakingdefense.com/2023/02/israels-iai-seeking-to-increase-us-ties-on-quantum-hypersonics/

06【Netherlands and United States sign joint statement on quantum information technology cooperation】

On February 15, the United States and the Netherlands signed a joint statement on quantum information science and technology (QIST) cooperation in The Hague. The two countries are accelerating the pace of research in quantum information science and technology through the National Quantum Initiative (NQI) and the Quantum Delta NL program, respectively. Previously, the United States has signed declarations of cooperation with France, Finland, Sweden, Denmark, the United Kingdom, etc. (Source: National Quantum Initiative official website)

Original link:

https://www.quantum.gov/the-united-states-and-the-netherlands-sign-joint-statement-to-enhance-cooperation-on-quantum/

07【India and the United States cooperate to develop strategic technologies such as quantum computing】

Recently, the national security advisers of India and the United States chaired the first meeting of the key and emerging technology initiatives of the United States and India. In the field of quantum science and technology, the two countries will sign a new implementation arrangement for research institution partnerships between the National Science Foundation and Indian science institutions to expand international cooperation in a range of fields such as artificial intelligence and quantum technologies; Establish a joint India-US quantum coordination mechanism to promote research and industrial cooperation. (Source: White House website)

Original link:

https://www.whitehouse.gov/briefing-room/statements-releases/2023/01/31/fact-sheet-united-states-and-india-elevate-strategic-partnership-with-the-initiative-on-critical-and-emerging-technology-icet/

Industry progress

/ Domestic /

01【Guoke Quantum signed a cooperation agreement with Yunnan Institute of Culture, Tourism and Transportation and Electronics】

On January 31, Yunnan Cultural Tourism Transportation Development Co., Ltd. signed a framework cooperation agreement with Guoke Quantum Communication Network Co., Ltd. and Yunnan Electronics Industry Research Institute Co., Ltd. The "Vehicle Network Platform" project to be implemented by the three parties is to ensure the safe operation of tourism traffic as the starting point, introduce quantum security services into cultural and tourism traffic management, and build a sustainable development of Yunnan cultural and tourism transportation vehicle networking platform integrating safe transportation, precise services and digital operations. (Source: Yunnan State-owned Assets Official Micro)

Original link:

https://mp.weixin.qq.com/s/qyQW9MVPI9d0IadmxP7mEA

02【Anhui Provincial Department of Finance realizes quantum encryption transmission data for the first time】

News on February 28, the Anhui Provincial Department of Finance government cloud business system and Hefei Municipal Bureau of Finance respectively deployed quantum key distribution equipment, relying on Hefei quantum metro network, through quantum key distribution technology, quantum key relay technology and classical quantum wavelength division multiplexing technology, to achieve quantum encryption transmission between the provincial department of Anhui Provincial Budget Management Integrated System and Hefei City, improving the security of the system and data. (Source: Anhui Provincial Department of Finance official micro)

Original link:

https://mp.weixin.qq.com/s/y-YZZdACYgkIiXisNmiCCw

03【Guodun Quantum won the highest award of the National Disruptive Technology Innovation Competition of the Ministry of Science and Technology】

On February 24, the final results of the 2022 National Disruptive Technology Innovation Competition hosted by the Ministry of Science and Technology were released. Since its launch in July 2022, the competition has attracted more than 2,800 technical projects from key universities, well-known scientific research institutes, industry leading enterprises and other units across the country to register for the competition. The quantum computing related projects of Guodun Quantum won the highest award of the competition - the winning project after layers of screening and project competition. (Source: Guodun Quantum Official Micro)

Original link:

https://mp.weixin.qq.com/s/edI_lXIRBU1tG3qpEReocg

04【"Challenge Cup" competition for the first time takes quantum computing as the competition topic, Guodun Quantum Ranking]

On February 17, the 18th "Challenge Cup" National College Students Extracurricular Academic Science and Technology Works Competition "Unveiling" special competition list was released, and for the first time the mainstream research direction of quantum information technology - "quantum computing" was taken as the competition topic. China Shield Quantum undertakes the publication and organization of the "Software Development and Application Exploration Based on Quantum Computing Cloud Platform" competition, which will provide rich cash rewards and strong safeguard measures for all participants. (Source: Communist Youth League Central Committee official micro)

Original link:

https://mp.weixin.qq.com/s/8fYezsqr5xbTtm5GqDqk2g

/ International /

01【The four sub-alliances of the United States, Canada, Japan and Europe established an international council】

Recently, Canadian Quantum Industries, the Quantum Economic Development Alliance of the United States, the Japan Quantum Strategic Industrial Revolution Alliance and the European Quantum Industry Alliance signed a memorandum of understanding (MoU) to formally establish the Council of the International Quantum Industry Association. The Council aims to strengthen communication and cooperation among participating alliances on the development goals and methods of quantum technology. (Source: bussinesswire website)

Original link:

https://www.businesswire.com/news/home/20230131005218/en/Quantum-Consortia-QIC-QED-C-Q-STAR-and-QuIC-Form-International-Council-to-Enable-and-Grow-the-Global-Quantum-Industry

02【SKT launches the next generation of "quantum cryptography single chip" and exhibits at MWC]

On February 20, SKT announced that a quantum random number generator chip and a semiconductor with cryptographic communication functions jointly developed with IDQ, a subsidiary of SK Square, and KCS, a South Korean security company, have been launched, which was exhibited at MWC 2023 on February 28. "Quantum cryptography single chip" is an ultra-light, low-power chip that can provide security protection for a variety of IoT-based products and devices. In addition to using quantum-based encryption key generation technology, the chip also applies security technologies such as PUF (Physical Unclonable Function), and its biggest advantage is that it has strong security, and SKT is currently applying to obtain security certification from the National Intelligence Agency. (Source: SKT official website, IDQ official website)

Original link:

https://news.sktelecom.com/185271

https://www.idquantique.com/id-quantique-kcs-and-sk-telecom-release-a-new-quantum-enhanced-cryptographic-chip-at-mwc23/

03【The United States shows the first drone-based quantum network】

On February 22, Professor Warner A. Miller of the Quantum Physics Laboratory of Florida Atlantic University (FAU) introduced and demonstrated the first drone-based mobile quantum network in the United States to US Representative Cory Mills. The network includes ground stations, drones, lasers, and fiber optics that can share quantum-secure information. FAU, quantum technology company Qubitekk and U.S. defense company L3Harris are working with the U.S. Air Force to combine expertise from academia, government and industry, with the potential to expand the program to larger aviation platforms and other ground and offshore applications. (Source: FAU official website)

Original link:

https://www.fau.edu/newsdesk/articles/quantum-drone-lab-visit.php

04【Spanish quantum company LuxQuanta launches commercial quantum CV-QKD network system】

On February 19, Spanish quantum key distribution company LuxQuanta released its first product, NOVA LQ™, a device that encrypts data using quantum physics to provide a high-performance continuous variable quantum key distribution (CV-QKD) solution for intra-city networks. Founded in May 2021 as a spin-off of ICFO, Spain's photonic science research institute, LuxQuanta aims to integrate advanced, secure quantum cryptography into traditional communication infrastructure. (Source: LuxQuanta official website)

Original link:

https://www.luxquanta.com/our-new-nova-lq-system-featured-in-the-national-press-n-25-en

05【QCI establishes new subsidiary to provide products and services such as quantum communication for the government and defense departments】

On February 6, quantum computing company QCI announced the formal establishment of a wholly owned subsidiary called QI Solutions dedicated to providing quantum solutions to the government and defense markets. QI Solutions offers entropy quantum computing solutions, software, and quantum communication and sensing technologies, and will provide a range of customized services in areas such as secure supply chain management, optical advanced manufacturing, quantum workforce development, and quantum R&D. (Source: QCI website)

Original link:

https://www.quantumcomputinginc.com/press-releases/quantum-computing-inc-creates-a-new-subsidiary-to-deliver-products-and-services-for-the-government-and-defense-sectors/

06 [Defense Advanced Research Projects Agency selects three companies to explore feasible new methods for fault-tolerant quantum computers]

Recently, the Defense Advanced Research Projects Agency selected Atom Computing, Microsoft Corporation and PsiQuantum to join the undeveloped Utility-Scale Quantum Computing System (US2QC) project. The project aims to explore strategic applications of quantum computing in the public sector. The program is expected to consist of four phases over five years, with three companies conducting the conceptual design, with DARPA responsible for testing and validating and evaluating the feasibility and results of the conceptual design. (Source: quantum computing report website, The quantum insider website)

Original link:

https://quantumcomputingreport.com/psiquantum-atom-computing-and-microsoft-chosen-for-darpas-us2qc-program/

https://thequantuminsider.com/2023/02/01/darpa-collaborating-with-atom-computing-microsoft-and-psiquantum-to-develop-utility-scale-quantum-computers/

07 [Quantum computing company Rigetti receives delisting warning, updates business strategy]

Recently, quantum computing company Rigetti received a delisting "warning" from Nasdaq for failing to maintain a closing price above $1 in the past 30 trading days. On February 10, Rigetti announced an update to its business strategy and revised its technology roadmap. These include the implementation of plans to cut 28% of the workforce and the delivery of the Ankaa-1 quantum system with 84 qubits in the first quarter of 2023. Its new president and CEO said that the upcoming 84-qubit system, which achieves 98% fidelity, will continue to focus on system improvements in fidelity (from 98% to 99%), which is expected to reach around 99.5% early next year. (Source: fierce electronics website, Rigetti website)

Original link:

https://www.fierceelectronics.com/electronics/can-semiconductor-veteran-revive-stumbling-quantum-firm

https://investors.rigetti.com/news-releases/news-release-details/rigetti-computing-announces-updated-strategic-plan-prioritize

08 [Post-quantum cryptography startup Sandbox AQ raises $500 million]

On February 14, Sandbox AQ announced that it had closed a $500 million round in which Breyer Capital, T. Rowe Price Fund and Salesforce Inc. founder Marc Benioff's TIME Ventures were all involved, as did Eric Schmidt, the company's chairman and former CEO of Google. Sandbox AQ spun off from Google last year as an independent company, and its current focus is on helping customers defend against attacks from quantum computers through post-quantum cryptography. (Source: siliconANGLE website)

Original link:

https://siliconangle.com/2023/02/14/post-quantum-cryptography-startup-sandbox-aq-raises-500m/

09【Australian quantum industry receives multiple investments to expand quantum computing-related research】

Recently, Australian quantum computing and sensing company Q-CTRL announced its B-1 series financing of $27.4 million, with Salesforce Ventures also participating. According to Pitchbook, Q-CTRL's Series B funding round totaled more than $52 million. The company expects to grow its team from 80 to about 120 people in 2023, with offices in Sydney, Los Angeles and Berlin.

On 21 February, the University of Sydney announced a $7.4 million investment to expand its quantum technology facility to build a future qubit foundry at the Sydney Nanoscience Centre. The project will bring together Sydney's existing strengths in quantum computing research, focus on the fundamental science needed to invent the next generation of qubits, enable Sydney industry and government to forge quantum partnerships, and place Australia at the forefront of next-generation qubit design. (Source: Q-CTRL website, University of Sydney official website)

Original link:

https://q-ctrl.com/blog/q-ctrl-announces-expansion-of-industry-leading-series-b-for-quantum-infrastructure-software

https://www.sydney.edu.au/news-opinion/news/2023/02/21/future-qubit-foundry-at-forefront-quantum-technology.html

Cutting-edge technology

/ Domestic /

01【Tunable anomalous Froquet topological band based on ultracold atom】

The experimental group of Pan Jianwei and Chen Shuai of the University of Science and Technology of China, together with Zhang Wei of the Department of Physics of Chinese Minmin University and the research group of Liu Xiongjun of Peking University, have made important progress in the field of cold atom quantum simulation, realized a periodically driven anomalous quantum Hall effect model by imprisoning ⁸⁷Rb atoms in the vibrating optical lattice, and used the (d-1) dimensional band flip surface to react to the topological characteristics of the (d+1) dimensional periodic drive system, and obtained rich phase diagrams. The results were recently published in Physical Review Letters.

Original link:

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.130.043201

02【Optical frequency comb maintains TF-QKD's light source coherence】

Researchers from Beijing Academy of Quantum Information Sciences used local optical frequency combs to maintain the coherence of remote light sources, and experimentally realized dual-field quantum key distribution without additional channel assistance, which can tolerate 100km level of link differences on both sides, which effectively improves the practicality of the scheme. The experiment achieved a code rate of 0.32bps on a 615.6km fiber. The results were published Feb. 18 in Nature Communications.

Original link:

https://doi.org/10.1038/s41467-023-36573-2

03【Passive modulation method realizes free space CV-QKD】

Researchers from Shanghai Jiao Tong University proposed and experimented with a dynamically prepared continuous variable quantum key distribution scheme, which has a simpler passive modulation structure than the traditional Gaussian modulation scheme, which is more suitable for integration and free space terminal scenarios. In this experiment, the local local oscillator transmitted through the fluctuation channel is realized for the first time using an enhanced spontaneous radiation light source, and a code rate of 1Mbps (infinite code length approximation) is achieved on an analog channel with 15dB attenuation and turbulent disturbance. The results were published Feb. 21 in Optics Letters.

Original link:

https://doi.org/10.1364/ol.485166

04【Single photon avalanche tube reaches 700M counting rate】

Researchers from the Beijing Academy of Quantum Information Sciences and the Institute of Semiconductors of the Chinese Academy of Sciences have designed an avalanche control and signal readout circuit that significantly increases the maximum count rate of single-photon avalanche diodes (SPADs). This technique is based on ultra-narrow gating to suppress the SPAD's level of captured current-carrying electrons (which will result in a back pulse) and uses ultra-narrow interference circuitry to filter out more than 80dB of capacitive reactions caused by gated signals with less distortion. Through the two-stage cascade of the above circuit, a count rate of up to 700M (per second) and a low 0.5% backpulse level is achieved on a single photon detector with a detection efficiency of 25.3% and a sinusoidal gated 1.25GHz. The results were published Feb. 15 in Optics Express.

Original link:

https://doi.org/10.1364/oe.478828

05【Decoding chip of polarization coding QKD】

Researchers from Guangxi University, the National Information Optoelectronics Innovation Center, and China Information and Communications Technology Group Co., Ltd. have developed a polarization-coding QKD decoding chip. The chip integrates multiple polarization beam splitting rotators, thermoacoustic phase modulators, multimode interference and dimmable attenuation, etc., and uses the polarization-path conversion scheme for decoding, which can maintain the polarization decoding stability (bit error rate ~0.59%) for a long time, with a total attenuation of about 4dB. The results were published February 15 in Elsevier's journal Chip.

Original link:

https://doi.org/10.1016/j.chip.2023.100039

/ International /

01 [Google reduces calculation error rate for the first time by adding qubits]

The Google quantum AI team demonstrated a logical qubit surface code that can reduce the error rate as the system scales up. They built a 72-qubit superconducting quantum processor and tested it with two different surface codes — one distance-5 logical qubit (based on 49 physical qubits) and one smaller distance-3 logical qubit (based on 17 physical qubits). Experiments show that larger surface codes can achieve better logical qubit performance (2.914% logic error per cycle) and are better than smaller surface codes (3.028% logic errors per cycle). The results were published Feb. 22 in Nature. The head of the quantum computing department at Google's headquarters said that Google's current improvements are still small, and the error rate needs to fall even more.

Original link:

https://www.nature.com/articles/s41586-022-05434-1

https://doi.org/10.1038/d41586-023-00536-w

02【Silicon-based qubit manipulation method without RF signal】

Researchers at the Hughes Laboratory in the United States have designed a silicon/silicon germanium quantum dot spin manipulation method, which avoids the correlation error caused by the "traditional" method using injected RF signals for manipulation, and provides a new method for the manipulation of fault-tolerant quantum computing. Based on the degenerate evolution of energy levels under ultrafine action, this method controls the partial spin exchange between the target bit spin and the adjacent spin. This method has the advantages of pure electrical operation, low crosstalk, and insensitivity to specific noise sources. 96.3% CNOT operation and 99.3% exchange operation with fidelity are achieved on silicon/silicon germanium quantum dots. The results were published in Nature as a manuscript for rapid release on February 6.

Original link:

https://doi.org/10.1038/s41586-023-05777-3

03【Electron spin manipulation method without external magnetic field】

Researchers at the University of New South Wales in Australia, the University of Melbourne and Keio University in Japan have devised a new method for regulating the spin of quantum dots, overcoming the shortcomings of traditional methods that rely on external magnetic fields and are therefore difficult to integrate. Based on the ultra-fine interaction of electron-nucleus spin, this method uses the electric field of radio frequency for spin manipulation, which is suitable for large-scale construction of solid-state quantum processors. The results were published Feb. 10 in Science Advances.

Original link:

https://www.science.org/doi/10.1126/sciadv.add9408

04【Single electron spin readout performance broke records】

Researchers at the University of Cambridge, Quantum Motion, Hitachi Cambridge Laboratory, the French Research Center for Micro and Nano Technology (MIINATEC Campus), and the University of California have designed a high-fidelity, single-readout silicon quantum dot electron spin integrated device - single electron box. The device connects quantum dots through a low-loss, high-impedance oscillator, and uses spin-dependent tunneling of the bubble potential barrier to form spin-charge conversion, using fewer electrodes than conventional detection methods, achieving the highest readout performance to date, with 99.2% fidelity in less than 6 microseconds. The results were published Feb. 23 in Physical Review X.

Original link:

https://doi.org/10.1103/physrevx.13.011023

05【Superconducting nanowire 32-channel array single photon detector reaches 1.5G counting rate】

Researchers at NASA's Jet Propulsion Laboratory and Caltech have developed ultra-high-speed near-infrared single-photon detectors. The detector integrates 32 channels of superconducting nanowires into an array, which effectively overcomes the limitation of the detector's dead time on continuous working ability. The detector has a single-photon detection efficiency of 78%, 158 dark counts per second, and a time jitter of less than 50ps, which will effectively support quantum communication frequency to 10GHz. The results were published Jan. 26 in Optica.

Original link:

https://doi.org/10.1364/optica.478960

06【Quantum Communication Protocol Based on Superposition Quantum Walk】

Researchers from the Indian Academy of Sciences, Talamani College and others have devised a new quantum communication method. This method uses J-waveplate, orbital angular momentum classifier, optical switch, optical delay line and other devices to modulate entanglement between single-photon polarization state and orbital angular momentum state, and uses the evolution between quantum superposition states (discrete time random walk) for coding, and uses internal entanglement to protect the security of coding state. This method can detect some eavesdropping attacks when the channel noise is low. The results were published Feb. 13 in Physical Review A.

Original link:

https://doi.org/10.1103/PhysRevA.107.022611

07【Side Channel Cracking PQC Algorithm CRYSTALS-Kybe】

The CRYSTALS-Kyber algorithm was selected last year by the National Institute of Standards and Technology (NIST) as part of the standard for encapsulating data to prevent attacks by quantum computers. Researchers at the Royal Institute of Technology in Sweden used a new machine learning AI algorithm and a combination of side-channel attacks using power lines to crack the algorithm. The algorithm has been hardened for direct attacks, but the researchers looked at more sophisticated side-channel attacks, exploiting fluctuations in power consumption to disrupt code running in ARM Cortex-M4 CPUs. The research team developed a new neural network training method called recursive learning, which allowed them to recover message bits with a probability of more than 99%. They are currently developing countermeasures against algorithmic side-channel attacks.

Original link:

https://eprint.iacr.org/2022/1713

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