Bell-state generation for spin qubits via dissipative coupling
Bell-state generation for spin qubits via dissipative coupling
复制标题
通过耗散耦合产生自旋量子位的贝尔态
DOI:
10.1103/physrevb.106.l180406
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发表时间:
2022
影响因子:
3.7
通讯作者:
Tserkovnyak, Yaroslav
中科院分区:
文献类型:
--
作者:
Zou, Ji;Zhang, Shu;Tserkovnyak, Yaroslav
We theoretically investigate the dynamics of two spin qubits interacting with a magnetic medium. A systematic formal framework for this qubit-magnet hybrid system is developed in terms of the steady-state properties of the magnetic medium. Focusing on the induced dissipative coupling between the spin qubits, we show how a sizable long-lived entanglement can be established via the magnetic environment, in the absence of any coherent coupling. Moreover, we demonstrate that maximally entangled two-qubit states (Bell states) can be achieved in this scheme when complemented by proper postselection. In this situation, the time evolution of the entanglement is governed by a non-Hermitian Hamiltonian, where dynamical phases are separated by an exceptional point. The resultant Bell state is robust against weak random perturbations and does not require the preparation of a particular initial state. Our study may find applications in quantum information science, quantum spintronics, and for sensing of nonlocal quantum correlations.
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影响因子:
3.2
作者:
Y. Tserkovnyak
通讯作者:
Y. Tserkovnyak
DOI:
10.1209/0295-5075/101/60005
发表时间:
2012-06
期刊:
Europhysics Letters
影响因子:
--
作者:
S. McEndoo;P. Haikka;G. De Chiara;G. Palma;S. Maniscalco
通讯作者:
S. McEndoo;P. Haikka;G. De Chiara;G. Palma;S. Maniscalco
影响因子:
41.2
作者:
Balasubramanian, Gopalakrishnan;Neumann, Philipp;Wrachtrup, Joerg
通讯作者:
Wrachtrup, Joerg
影响因子:
4
作者:
A. Kamra;W. Belzig;A. Brataas
通讯作者:
A. Brataas
DOI:
10.1209/0295-5075/100/30007
发表时间:
2012
期刊:
Europhysics Letters
影响因子:
--
作者:
G. Kordas;S. Wimberger;D. Witthaut
通讯作者:
D. Witthaut