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Quantum Information Processing

Preparation of entangled W states with cat-state qubits in circuit QED

  • 01-08-2020
Published in:
Authors
Yu Zhang
Tong Liu
Yang Yu
Chui-Ping Yang
Published in
Quantum Information Processing | Issue 8/2020

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Abstract

Cat-state qubits (qubits encoded with cat states) have recently attracted much attention because of their enhanced lifetimes with quantum error correction. We here consider a circuit QED system consisting of three superconducting qutrits, each coupled to an individual cavity but all coupled to a common cavity. We show that entangled W states of three cat-state qubits hosted by the three individual cavities can be prepared with only a few basic operations. The higher energy level of the qutrits is not occupied; thus, decoherence from this level of the qutrits is greatly suppressed. In addition, the W states can be prepared deterministically. Numerical simulations show that high-fidelity production of the W states of three cat-state qubits is feasible with current circuit QED technology. This proposal is quite general and can be applied to create the proposed W states, with each cavity being a microwave or optical cavity and each qutrit being a three-level natural or artificial atom.

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previous article Evolution reconstruction of deviate Bell states by extending the novel Fourier-based method
next article Optimal economical telecloning of equatorial qubits
Title
Preparation of entangled W states with cat-state qubits in circuit QED
Authors
Yu Zhang
Tong Liu
Yang Yu
Chui-Ping Yang
Publication date
01-08-2020
Publisher
Springer US
Published in
Quantum Information Processing / Issue 8/2020
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-020-02715-4
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