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Quantum simulations with nuclear magnetic resonance system

Chinese Physics B 2021年第4期30卷 33-42页

作者： chudan qiu Xinfang Nie Dawei L Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China

Thanks to the quantum simulation,more and more problems in quantum mechanics which were previously inaccessible are now open to *** on the state-of-the-art techniques on quantum coherent control developed in past few decades,e.g.,the high-precision quantum gate manipulating,the time-reversal harnessing,the high-fidelity state preparation and tomography,the nuclear magnetic resonance(NMR) system offers a unique platform for quantum simulation of many-body physics and high-energy ***,we review the recent experimental progress and discuss the prospects for quantum simulation realized on NMR systems.

关键词： nuclear magnetic resonance quantum simulation quantum phase transition quantum gravity

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Dynamical-invariant-based holonomic quantum gates:Theory and experiment

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Fundamental Research 2023年第2期3卷 229-236页

作者： Yingcheng Li Tao Xin chudan qiu Keren Li Gangqin Liu Jun Li Yidun Wan Dawei Lu State Key Laboratory of Surface Physics Department of PhysicsCenter for Field Theory and Particle Physicsand Institute for Nanoelectronic devices and Quantum computingFudan UniversityShanghai 200433China Shanghai Qi Zhi Institute Shanghai 200030China Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and TechnologyShenzhen 518055China d Guangdong Provincial Key Laboratory of Quantum Science and Engineering Shenzhen 518055GuangdongChina Center for Quantum Computing Peng Cheng LaboratoryShenzhen 518055China Institute of Physics Chinese Academy of SciencesBeijing 100190China

Among existing approaches to holonomic quantum computing,the adiabatic holonomic quantum gates(HQGs)suffer errors due to decoherence,while the non-adiabatic HQGs either require additional Hilbert spaces or are difficult to ***,we report a systematic,scalable approach based on dynamical invariants to realize HQGs without using additional Hilbert *** presenting the theoretical framework of our approach,we design and experimentally evaluate single-qubit and two-qubits HQGs for the nuclear magnetic resonance *** single-qubit gates acquire average fidelity 0.9972 by randomized benchmarking,and the controlled-NOT gate acquires fidelity 0.9782 by quantum process *** approach is also platform-independent,and thus may open a way to large-scale holonomic quantum computation.

关键词： Geometric gates Dynamical invariant Nuclear magnetic resonance Holonomic gates Platform-independent

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Noisy intermediate-scale quantum computers

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Frontiers of physics 2023年第2期18卷 1-62页

作者： Bin Cheng Xiu-Hao Deng Xiu Gu Yu He Guangchong Hu Peihao Huang Jun Li Ben-Chuan Lin Dawei Lu Yao Lu chudan qiu Hui Wang Tao Xin Shi Yu Man-Hong Yung Junkai Zeng Song Zhang Youpeng Zhong Xinhua Peng Franco Nori Dapeng Yu Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China International Quantum Academy Shenzhen 518048China Guangdong Provincial Key Laboratory of Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Physics Southern University of Science and TechnologyShenzhen 518055China Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China Quantum Computing Center and Cluster for Pioneering Research RIKENWakoshiSaitama 351-0198Japan Physics Department University of MichiganAnn ArborMI 48109-1040USA

Quantum computers have made extraordinary progress over the past decade,and significant milestones have been achieved along the path of pursuing universal fault-tolerant quantum *** advantage,the tipping point heralding the quantum era,has been accomplished along with several waves of *** hardware has become more integrated and architectural compared to its toddler *** controlling precision of various physical systems is pushed beyond the fault-tolerant ***,quantum computation research has established a new norm by embracing industrialization and *** joint power of governments,private investors,and tech companies has significantly shaped a new vibrant environment that accelerates the development of this field,now at the beginning of the noisy intermediate-scale quantum ***,we first discuss the progress achieved in the field of quantum computation by reviewing the most important algorithms and advances in the most promising technical routes,and then summarizing the next-stage ***,we illustrate our confidence that solid foundations have been built for the fault-tolerant quantum computer and our optimism that the emergence of quantum killer applications essential for human society shall happen in the future.

关键词： quantum computer quantum algorithm quantum chip

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