Analytical solutions and genuine multipartite entanglement of the three-qubit Dicke model

Analytical solutions and genuine multipartite entanglement of the three-qubit Dicke model
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三量子位迪克模型的解析解和真正的多部分纠缠

DOI:
10.1103/physreva.94.012317
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发表时间:
2016-01
期刊:
影响因子:
2.9
通讯作者:
Qing-Hu Chen
Qing-Hu Chen
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yu-Yu Zhang;Xiang-You Chen;Shu He;Qing-Hu Chen

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我们提出了三个量子比特和单模腔耦合系统的解析解超越了驻波近似(RWA)。零阶近似给出了当量子比特远离腔体失谐时的正确解。一阶近似,称为广义行波近似(GRWA),产生一个有效的可解哈密顿量与普通的RWA一个相同的形式,并表现出显着的改善,即使在共振的RWA的能级。基于这些解析本征解,我们研究了两体纠缠和真正的多体纠缠。用GRWA计算的并发和GME的动力学与数值计算的结果一致。有趣的是,众所周知的纠缠突然死亡发生在二体纠缠动力学中,而不是在GME动力学中。
We present analytical solutions to three qubits and a single-mode cavity coupling system beyond the rotating-wave approximation (RWA). The zero-th order approximation gives correct solutions when the qubits are far detuned from the cavity. The first order approximation, called generalized rotating-wave approximation (GRWA), produces an effective solvable Hamiltonian with the same form as the ordinary RWA one and exhibits substantial improvements of energy levels over the RWA even on resonance. Based on these analytical eigen-solutions, we study both the bipartite entanglement and genuine multipartite entanglement (GME). The dynamics of the concurrence and the GME using the GRWA are in consistent with the numerical ones. Interestingly, the well known sudden death of entanglement occurs in the bipartite entanglement dynamics but not in GME dynamics.
DOI: 10.1136/bmj.323.7325.1375/a
发表时间: 2001-12
期刊: BMJ : British Medical Journal
影响因子: --
作者:
K. Barraclough
通讯作者: K. Barraclough
DOI: 10.1142/9789812386199_others06
发表时间: 2019-11
期刊: Problems and Solutions on Optics
影响因子: --
作者:
Jürgen Stuhler;Andrew J. Shields
通讯作者: Jürgen Stuhler;Andrew J. Shields