We demonstrate a strategy for implementation a quantum full adder in a spin chain quantum computer. As an example, we simulate a quantum full adder in a chain containing 201 spins. Our simulations also demonstrate how one can minimize errors generated by non-resonant effects.
A distributed quantum network would require quantum nodes capable of performing arbitrary quantum information protocols with high fidelity. So far the challenge has been in realizing such quantum nodes with features for scalable quantum computing. We show here that using the solid-state spins in 4H-Silicon Carbide (4H-SiC) such a goal could be realized, wherein a controlled generation of highly coherent qubit registers using nuclear spins is possible. Using a controlled isotope concentration and coherent control we perform here atomistic modeling of the central spin system formed by the electr…
Scalable Quantum Computing based on Spin Qubits in CNT QD
我们研究实验证明单电子${}^{12}$ C CNT QD具有显着的自旋轨道相互作用作为一个可扩展的量子计算机候选人。电子自旋和轨道角动量都可以作为用于量子处理的逻辑量子比特。我们引入宏观量子存储系统的形式注入磁性或自旋携带原子系综到纳米管。碳纳米管在有限温度下具有稳定的原子陷阱，在外加磁场中具有一维核自旋晶格。电子通过磁相互作用或超精细相互作用与原子系综耦合。该系统可实现简单的电子和核自旋读出。
Scalable entanglement of nuclear spins mediated by electron exchange
Massachusetts Institute of Technology（麻省理工学院）；Quantum Machines Inc.（量子机器公司）；Intel Corporation（英特尔公司）；School of Electrical Engineering and Telecommunications, UNSW Sydney（新南威尔士大学电气与电信工程学院）；ARC Centre of Excellence for Quantum Computation and Communication Technology（ARC量子计算与通信技术卓越中心）；NNF Quantum Computing Programme, Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所NNF量子计算项目）；Diraq Pty. Ltd.（Diraq有限公司）；School of Fundamental Science and Technology, Keio University（庆应义塾大学基础科学与技术学院）；School of Physics, University of Melbourne（墨尔本大学物理学院）；School of Science, RMIT University（皇家墨尔本理工大学理学院）
RF-free driving of nuclear spins with color centers in silicon carbide
University of Stuttgart（斯图加特大学）；Center for Integrated Quantum Science and Technology（集成量子科学与技术中心）；Max Planck Institute for Solid State Research（马克斯·普朗克固体研究所）；Helmholtz-Zentrum Dresden-Rossendorf（德累斯顿-罗斯多夫亥姆霍兹中心）；Luxembourg Institute of Science and Technology (LIST)（卢森堡科学与技术研究所）；University of Luxembourg（卢森堡大学）
We discuss how to simulate simple quantum logic operations with a large number of qubits. These simulations are needed for experimental testing of scalable solid-state quantum computers. Quantum logic for remote qubits is simulated in a spin chain. Analytical estimates are presented for possible correlated errors caused by non-resonant transitions. A range of parameters is given in which non-resonant effects can be minimized.
Scalable nuclear shell model calculations on noisy quantum computers
Indian Institute of Technology Roorkee（印度理工学院卢克瑙分校）；Centre for Photonics and Quantum Communication Technology, Indian Institute of Technology Roorkee（印度理工学院卢克瑙分校光子学与量子通信技术中心）
Scalable quantum error mitigation for dynamical decoupling
Westlake University（西湖大学）；Westlake Institute for Advanced Study（西湖高等研究院）；Anhui Province Key Laboratory of Scientific（安徽省科学重点实验室）；New York University Abu Dhabi（阿布扎比纽约大学）；University of Science（科技大学）
PIQC: Scalable Distributed Quantum Computing via Photonic Integration of Designed Molecular Quantum Nodes
NVision Quantum Technologies GmbH（NVision量子技术有限公司）；Ulm University（乌尔姆大学）；Institute for Quantum Optics (IQO), Ulm University（乌尔姆大学量子光学研究所）；Center for Integrated Quantum Science and Technology (IQST), Ulm University（乌尔姆大学集成量子科学与技术中心）；Institute of Theoretical Physics, Ulm University（乌尔姆大学理论物理研究所）；Racah Institute of Physics, The Hebrew University of Jerusalem（耶路撒冷希伯来大学拉卡物理学研究所）
Scalable integration of silicon carbide color centers into nanophotonic structures
University of Stuttgart（斯图加特大学）；Center for Integrated Quantum Science and Technology（集成量子科学与技术中心）；Max Planck Institute for Solid State Research（马克斯·普朗克固体的研究研究所）；Luxembourg Institute of Science and Technology (LIST)（卢森堡科学与技术研究所）；University of Luxembourg（卢森堡大学）；Helmholtz-Zentrum Dresden-Rossendorf（德累斯顿-罗斯多夫亥姆霍兹中心）
Toward scalable quantum computations of atomic nuclei
University of Tennessee（田纳西大学）；Oak Ridge National Laboratory（橡树岭国家实验室）；European Organization for Nuclear Research (CERN)（欧洲核子研究组织（CERN））；University of Geneva（日内瓦大学）
Nuclear spins in quantum dots are promising candidates for fast and scalable quantum memory. By utilizing the hyperfine interaction between the central electron and its surrounding nuclei, quantum information can be transferred to the collective state of the nuclei and be stored for a long time. However, nuclear spin fluctuations in a partially polarized nuclear bath deteriorate the quantum memory fidelity. Here we introduce a noise-resistant protocol to realize fast and high-fidelity quantum memory through Hamiltonian engineering. With analytics and numerics, we show that high-fidelity quantu…
Localized electronic and nuclear spin qubits in the solid state constitute a promising platform for storage and manipulation of quantum information, even at room temperature. However, the development of scalable systems requires the ability to entangle distant spins, which remains a challenge today. We propose and analyze an efficient, heralded scheme that employs a parity measurement in a decoherence free subspace to enable fast and robust entanglement generation between distant spin qubits mediated by a hot mechanical oscillator. We find that high-fidelity entanglement at cryogenic and even …
Coherent many-body states are highly promising for robust and scalable quantum information processing. While far-reaching theoretical predictions have been made for various implementations, direct experimental evidence of their appealing properties can be challenging. Here, we demonstrate coherent optical manipulation of the nuclear spin ensemble in the lead halide perovskite semiconductor FAPbBr$_3$ (FA=formamidinium), targeting a long-postulated collective dark state that is insensitive to optical pumping. Via optical orientation of localized hole spins we drive the nuclear many-body system …
