Fast generating W state of three superconducting qubits via Lewis-Riesenfeld invariants

doi:10.1088/1674-1056/26/6/060306

中国物理B ›› 2017, Vol. 26 ›› Issue (6): 60306-060306.doi: 10.1088/1674-1056/26/6/060306

Fast generating W state of three superconducting qubits via Lewis-Riesenfeld invariants

Lin Yu(于琳), Jing Xu(徐晶), Jin-Lei Wu(吴金雷), Xin Ji(计新)

Department of Physics, College of Science, Yanbian University, Yanji 133002, China

收稿日期:2017-01-18 修回日期:2017-03-02 出版日期:2017-06-05 发布日期:2017-06-05
通讯作者: Xin Ji E-mail:jixin@ybu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11464046).

Fast generating W state of three superconducting qubits via Lewis-Riesenfeld invariants

Lin Yu(于琳), Jing Xu(徐晶), Jin-Lei Wu(吴金雷), Xin Ji(计新)

Department of Physics, College of Science, Yanbian University, Yanji 133002, China

Received:2017-01-18 Revised:2017-03-02 Online:2017-06-05 Published:2017-06-05
Contact: Xin Ji E-mail:jixin@ybu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11464046).

摘要/Abstract

摘要： We propose a scheme for a fast generating three-qubit W state in a superconducting system by using a technique of shortcuts to adiabaticity, Lewis-Riesenfeld invariants. Three identical superconducting qubits (SQs) are connected by two coplanar waveguide resonators (CPWRs) capacitively. Under a certain limit condition, we convert the complicated SQ system into a simple three-state system. By designing experimentally accessible harmonic pulses, a three-SQ W state is implemented with quite short operation time and high fidelity. Numerical simulations prove that the scheme is robust against the parameter deviation. In addition, we also give detailed discussion about the scheme robustness against decoherence.

关键词: W state, superconducting qubits, shortcuts to adiabaticity

Abstract: We propose a scheme for a fast generating three-qubit W state in a superconducting system by using a technique of shortcuts to adiabaticity, Lewis-Riesenfeld invariants. Three identical superconducting qubits (SQs) are connected by two coplanar waveguide resonators (CPWRs) capacitively. Under a certain limit condition, we convert the complicated SQ system into a simple three-state system. By designing experimentally accessible harmonic pulses, a three-SQ W state is implemented with quite short operation time and high fidelity. Numerical simulations prove that the scheme is robust against the parameter deviation. In addition, we also give detailed discussion about the scheme robustness against decoherence.

Key words: W state, superconducting qubits, shortcuts to adiabaticity

中图分类号: (Entanglement production and manipulation)

03.67.Bg

42.50.Dv (Quantum state engineering and measurements) 42.50.Ex (Optical implementations of quantum information processing and transfer)

于琳, 徐晶, 吴金雷, 计新. Fast generating W state of three superconducting qubits via Lewis-Riesenfeld invariants[J]. 中国物理B, 2017, 26(6): 60306-060306.

Lin Yu(于琳), Jing Xu(徐晶), Jin-Lei Wu(吴金雷), Xin Ji(计新). Fast generating W state of three superconducting qubits via Lewis-Riesenfeld invariants[J]. Chin. Phys. B, 2017, 26(6): 60306-060306.

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Fast generating W state of three superconducting qubits via Lewis-Riesenfeld invariants

Fast generating W state of three superconducting qubits via Lewis-Riesenfeld invariants

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