Dissipative stabilization of entangled qubit pairs in quantum arrays with a single localized dissipative channel

Year: 2023

Authors: Angeletti J., Zippilli S., Vitali D.

Autors Affiliation: Univ Camerino, Sch Sci & Technol, Phys Div, I-62032 Camerino, MC, Italy; Univ Naples Federico II, Dept Phys, I-80126 Naples, Italy; INFN, Sez Perugia, I-06123 Perugia, Italy; CNR, INO, I-50125 Florence, Italy.

Abstract: We study the dissipative stabilization of entangled states in arrays of quantum systems. Specifically, we are interested in the states of qubits (spin-1/2) which may or may not interact with one or more cavities (bosonic modes). In all cases only one element, either a cavity or a qubit, is lossy and irreversibly coupled to a reservoir. When the lossy element is a cavity, we consider a squeezed reservoir and only interactions which conserve the number of cavity excitations. Instead, when the lossy element is a qubit, pure decay and a properly selected structure of XY-interactions are taken into account. We show that in all cases, in the steady state, many pairs of distant, non-directly interacting qubits, which cover the whole array, can get entangled in a stationary way, by means of the interplay of dissipation and local interactions.

Journal/Review: QUANTUM SCIENCE AND TECHNOLOGY

Volume: 8 (3)      Pages from: 35020-1  to: 35020-16

More Information: We acknowledge the support of PNRR MUR project PE0000023-NQSTI (Italy), and of the European Union Horizon 2020 Programme for Research and Innovation through the Project No. 862644 (FET Open QUARTET).
KeyWords: dissipative; entanglement; arrays; quantum; qubit; cavity
DOI: 10.1088/2058-9565/acd4e3

Citations: 3
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