Entanglement concentration and purification of two-mode squeezed microwave photons in circuit QED

2018/02/16 by Hao Zhang, Ahmed Alsaedi, Tasawar Hayat +1
Computer Science · Physics and Astronomy · #Circuit quantum electrodynamics #Mechanical and Optical Resonators #Microwave #Photon #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum optics #Quantum optics and atomic interactions #Quantum sensor #Resonator #quant-ph

paper · pdf · doi:10.1016/j.aop.2018.02.007

published as Annals of Physics 391, 112-119 (2018) · 7 pages, 4 figures

openalex publication_date 2018/02/16 · arxiv created 2018/03/01 · arxiv updated 2018/03/02 · openalex created_date 2018/03/29 · openalex updated_date 2026/08/05

Abstract

We present a theoretical proposal for a physical implementation of entanglement concentration and purification protocols for two-mode squeezed microwave photons in circuit quantum electrodynamics (QED). First, we give the description of the cross-Kerr effect induced between two resonators in circuit QED. Then we use the cross-Kerr media to design the effective quantum nondemolition (QND) measurement on microwave-photon number. By using the QND measurement, the parties in quantum communication can accomplish the entanglement concentration and purification of nonlocal two-mode squeezed microwave photons. We discuss the feasibility of our schemes by giving the detailed parameters which can be realized with current experimental technology. Our work can improve some practical applications in continuous-variable microwave-based quantum information processing.

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