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Chinese Physics Letters

Quantum State Transfer between Charge and Flux Qubits in Circuit-QED

吴琴琴, 廖洁桥, 匡乐满

Published Jan 1, 2008• 0 citations
OpenAlex

Abstract

我们建议一个计划在混合电路量 electrodynamics (证完) 实现量状态转移由超导的费用 qubit，流动 qubit，和一根传播线组成的系统共鸣器(TLR ) 。量状态在费用 qubit 之间转，流动 qubit 能被把 TLR 用作数据总线认识到，这被显示出。

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We propose a scheme to enable a controllable cross-Kerr interaction between microwave photons in a circuit quantum electrodynamics (QED) system. In this scheme we use two transmission-line resonators (TLRs) and one superconducting quantum interference device (SQUID) type charge qubit, which acts as an artificial atom. It is shown that in the dispersive regime of the circuit-QED system, a controllable cross-Kerr interaction can be obtained by properly preparing the initial state of the qubit, and a large cross-phase shift between two microwave fields in the two TLRs can then be reached. Based on this cross-Kerr interaction, we show how to create a macroscopic entangled state between the two TLRs.