A potential implementation of quantum-computation schemes in semiconductor-based structures is proposed. In particular, an array of quantum dots is shown to be an ideal quantum register for a noiseless information encoding. In addition to the suppression of phase-breaking processes in quantum dots due to the well-known phonon bottleneck, we show that a proper quantum encoding allows to realise a decoherence-free evolution on a time-scale long compared to the femtosecond scale of modern ultrafast laser technology. This result might open the way to the realization of semiconductor-based quantum processors.
Recursive encoding and decoding of the noiseless subsystem for qudits
我们给出了一个完整的解释的无噪声子系统,保护一个单一的量子比特对集体错误和相应的递归方案所描述的C。K. Li et.等人[Phys.Rev.A84,044301(2011)]从表征理论的观点来分析。此外,我们将该构造推广到集体SU($d$)误差影响下的量子点。我们发现,在这种递归方案下,渐近编码率是$1/d$。
Experimental Simulation of Two Pulses and Three Pulses Coherent One Way Quantum Key Distribution Protocol in Noisy/Noiseless and Wired/Wireless Environment
Department of Computational Mathematics, Science, and Engineering, Michigan State University(密歇根州立大学计算数学、科学与工程系);School of Informatics, University of Edinburgh(爱丁堡大学信息学院)
Two-body control of noiseless subsystems with mixed $SU(3)$ representations lifts teleportation above the classical fidelity limit
International Centre for Theory of Quantum Technologies (ICTQT), University of Gdańsk(格但斯克大学量子技术理论国际中心);Department of Computer Science, University of Oxford(牛津大学计算机科学系)
School of Computation, Information & Technology, Technical Univ. of Munich(慕尼黑工业大学计算、信息与技术学院);Fraunhofer Institute for Cognitive Systems IKS(弗劳恩霍夫认知系统研究所IKS)
All-valid-state HOBO encoding for constrained combinatorial optimization on NISQ devices
Tokyo University of Agriculture and Technology(东京农工大学);The Institute of Medical Science, The University of Tokyo(东京大学医学科学研究所);The University of Tokyo(东京大学)
Error-Correction Transitions in Finite-Depth Quantum Channels
Laboratoire de Physique Théorique et Modélisation, CNRS UMR 8089, CY Cergy Paris Université(理论与建模物理实验室,法国国家科学研究中心,塞吉-蓬图瓦兹CY大学);JEIP, UAR 3573 CNRS, Collège de France, PSL Research University(欧洲理论粒子物理联合研究单位,法国国家科学研究中心,法兰西学院,巴黎文理研究大学);CeFEMA-LaPMET, Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa(复杂系统与能源物理中心,高等理工学院物理系,里斯本大学);CY Advanced Studies, Maison internationale de la recherche, CY Cergy Paris Université(CY高级研究院,国际研究中心,塞吉-蓬图瓦兹CY大学);Laboratoire de Physique de l’École Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris-Cité(巴黎高等师范学院物理实验室,巴黎文理研究大学,法国国家科学研究中心,索邦大学,巴黎西岱大学)
Empirical Sample Complexity of Neural Network Mixed State Reconstruction
Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL)(洛桑联邦理工学院物理研究所);Center for Quantum Science and Engineering, École Polytechnique Fédérale de Lausanne (EPFL)(洛桑联邦理工学院量子科学与工程中心);Zhili College, Tsinghua University(清华大学知礼书院);CPHT, CNRS, École polytechnique, Institut Polytechnique de Paris(法国国家科学研究中心理论物理与高等能源物理实验室、巴黎综合理工学院、巴黎理工学院);Collège de France, Université PSL(法兰西学院、巴黎文理研究大学)
Pre-training Tensor-Train Networks Facilitates Machine Learning with Variational Quantum Circuits
Georgia Institute of Technology(佐治亚理工学院);NVIDIA Research(NVIDIA研究);IBM Research(IBM研究);Hon Hai (Foxconn) Quantum Computing Research Center(鸿海(富士康)量子计算研究中心)
Classical simulation of amplitude-damped bucket-brigade quantum random access memories via predictable branch evolution
Institute of Artificial Intelligence, Hefei Comprehensive National Science Center(合肥综合性国家科学中心人工智能研究院);Laboratory of Quantum Information, University of Science and Technology of China(中国科学技术大学量子信息实验室);Anhui Province Key Laboratory of Quantum Network, University of Science and Technology of China(中国科学技术大学安徽省量子网络重点实验室);Origin Quantum Computing Technology (Hefei) Co., Ltd.(本源量子计算技术(合肥)有限公司)
Novel qubits in hybrid semiconductor-superconductor nanostructures
Delft University of Technology(代尔夫特理工大学);IBM Research Europe(IBM欧洲研究院);Consejo Superior de Investigaciones Científicas (CSIC)(西班牙高等科学研究委员会);Instituto de Ciencia de Materiales de Madrid (ICMM)(马德里材料科学研究所);Institute of Science and Technology Austria(奥地利科学技术研究所);New York University(纽约大学)
Classical capacities under physical constraints: More capacity with less entanglement
Harish-Chandra Research Institute, A CI of Homi Bhabha National Institute(哈里什-昌德拉研究所,霍米·巴巴国立学院成员);QICI Quantum Information and Computation Initiative, Department of Computer Science, The University of Hong Kong(香港大学计算机科学系量子信息计算倡议)