检索结果-南通市图书馆

A scheme for two-photon lasing with two coupled flux qubits in circuit quantum electrodynamics

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2015年第6期24卷 353-359页

作者：黄文邹旭波郭光灿 Key Laboratory of quantum Information University of Science and Technology of China Synergetic Innovation Center of quantum Information and quantum Physics University of Science and Technology of China

We theoretically study the system of a superconducting transmission line resonator coupled to two interacting super- conducting flux qubits. It is shown that under certain conditions the resonator mode can be tuned to two-photon resonance between the ground state and the highest excited state while the middle excited states are far-off resonance. Furthermore, we study the steady-state properties of the flux qubits and resonator, such as the photon statistics, the spectrum and squeezing of the resonator, and demonstrate that two-photon laser can be implemented with current experimental technology.

关键词： circuit quantum electrodynamics two-photon laser superconducting Josephson junction

Fast generation of W state via superadiabatic-based shortcut in circuit quantum electrodynamics

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第3期30卷 61-67页

作者：王雪梅张安琪许鹏赵生妹 Institute of Signal Processing and Transmission Nanjing University of Posts and TelecommunicationsNanjing 210003China

We propose a scheme to fast prepare the three-qubit W state via superadiabatic-based shortcuts in a circuit quantumelectrodynamics (circuit QED) system. We derive the effective Hamiltonian to suppress the unwanted transitions betweendifferent eigenstates by counterdiabatic driving, and obtain the W state with high-fidelity based on the superadiabaticpassage. The numerical simulation results demonstrate that the proposed scheme can accelerate the evolution, and is moreefficient than that with the adiabatic passage. In addition, the proposed scheme is robust to the decoherence caused by theresonator decay and qubit relaxation, and does not need additional parameters, which could be feasible in experiment.

关键词： W state superadiabatic-based shortcut circuit quantum electrodynamics

Remote entangling gate between a quantum dot spin and a transmon qubit mediated by microwave photons

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第2期33卷 52-59页

作者：朱行宇朱乐天涂涛李传锋 Key Laboratory of quantum Information Chinese Academy of SciencesUniversity of Science and Technology of ChinaHefei 230026China School of Mechanical and Electronic Engineering Suzhou UniversitySuzhou 234000China Hefei National Laboratory University of Science and Technology of ChinaChinese Academy of SciencesHefei 230088China

Spin qubits and superconducting qubits are promising candidates for realizing solid-state quantum information *** a hybrid architecture that combines the advantages of different qubits on the same chip is a highly desirable but challenging *** we propose a hybrid architecture that utilizes a high-impedance SQUID array resonator as a quantum bus,thereby coherently coupling different solid-state *** employ a resonant exchange spin qubit hosted in a triple quantum dot and a superconducting transmon *** this hybrid system is highly tunable,it can operate in a dispersive regime,where the interaction between the different qubits is mediated by virtual *** utilizing such interactions,entangling gate operations between different qubits can be realized in a short time of 30 ns with a fidelity of up to 96.5%under realistic parameter *** utilizing this interaction,remote entangled state between different qubits can be prepared and is robust to perturbations of various *** results pave the way for exploring efficient fault-tolerant quantum computation on hybrid quantum architecture platforms.

关键词： hybrid quantum architectures circuit quantum electrodynamics entangling gate

Preparation of multi-photon Fock states and quantum entanglement properties in circuit QED

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2014年第4期23卷 130-134页

作者：嵇英华胡菊菊 Department of Physics Jiangxi Normal University Key Laboratory of Photoelectronics and Telecommunication of Jiangxi Province

We demonstrate the controllable generation of multi-photon Fock states in circuit quantum electrodynamics （circuit QED）. The external bias flux regulated by a counter can effectively adjust the bias time on each superconducting flux qubit so that each flux qubit can pass in turn through the circuit cavity and thereby avoid the effect of decoherence. We further investigate the quantum correlation dynamics of coupling superconducting qubits in a Fock state. The results reveal that the lower the photon number of the light field in the number state, the stronger the interaction between qubits is, then the more beneficial to maintaining entanglement between qubits it will be.

关键词： circuit quantum electrodynamics multi-photon Fock state preparation of quantum state concur-rence