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Quantum computation and W -state generation using superconducting flux qubits coupled to a cavity without geometric and dynamical manipulation

Based on superconducting quantum interference devices (SQUID's) coupled to a cavity, we propose a scheme for implementing a quantum phase-shift gate and generating a W state by an adiabatic evolution of dark eigenstates, without any contributions from dynamical and geometric gates. The Sole req...

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Published in:	Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2007-03, Vol.75 (3), Article 032347
Main Authors:	Song, Ke-Hui, Xiang, Shao-Hua, Liu, Qiong, Lu, De-Hua
Format:	Article
Language:	English
Subjects:	ADIABATIC APPROXIMATION CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS EIGENSTATES MICROWAVE RADIATION PHASE SHIFT QUANTUM COMPUTERS QUANTUM ENTANGLEMENT QUANTUM MECHANICS QUBITS SQUID DEVICES
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creator	Song, Ke-Hui Xiang, Shao-Hua Liu, Qiong Lu, De-Hua
description	Based on superconducting quantum interference devices (SQUID's) coupled to a cavity, we propose a scheme for implementing a quantum phase-shift gate and generating a W state by an adiabatic evolution of dark eigenstates, without any contributions from dynamical and geometric gates. The Sole requirement is of adiabatically increasing or decreasing Rabi frequencies of classical microwave pluses. Thus, the manipulation is robust against certain types of errors. We also analyze the experimental possibility that identical coupling can be achieved between SQUID qubits and cavity fields, and the cavity decay can be ignored in certain conditions. Based on a simple operation, our scheme may be realized in this solid-state system.
doi_str_mv	10.1103/PhysRevA.75.032347
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source	American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects	ADIABATIC APPROXIMATION CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS EIGENSTATES MICROWAVE RADIATION PHASE SHIFT QUANTUM COMPUTERS QUANTUM ENTANGLEMENT QUANTUM MECHANICS QUBITS SQUID DEVICES
title	Quantum computation and W -state generation using superconducting flux qubits coupled to a cavity without geometric and dynamical manipulation
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