Steady-state measurement-induced nonlocality in thermal reservoir

Abstract

We examined measurement-induced nonlocality (MIN) of a central system for which every of the constituent qubit is embedded in its respective independent thermal reservoir. By introducing anisotropy to the Heisenberg XY interaction of the qubits, we showed that the strength of the MIN can be enhanced apparently. The anisotropy of the spin interaction can also be employed to generate MIN from the initial zero-MIN states. In the infinite-time limit, the steady-state MIN is independent of the initial states and is determined solely by the anisotropic parameter of the system and the decoherence factor of the thermal reservoir.

Nonlocal advantage of quantum coherence of coupled qubits in thermal and dephasing reservoirs

“…J, ∆, and B in Ĥ equal zero). In fact, for such a special case, the decay behaviors of multipartite entanglement [69], Bell nonlocality [70], quantum discord [71] and measurement-induced nonlocality [72], have already been discussed. For the initial Bell states |Ψ ± ⟩ and |Φ ± ⟩ with n = 0, the time-evolved states are given by [70]…”

Steady-state teleportation fidelity and Bell nonlocality in dissipative environments

“…and the product states |00〉 and |11〉, for which one has ñ 22 = ñ 33 and ñ 23 = ñ 32 , then one can obtain from equation (4) that ρ(t) is independent of the system parameter J for these initial states. For the similar models, the dissipative effects on entanglement [31], quantum discord [58], and measurement-induced nonlocality [59] were investigated, while for the special case of two uncoupled qubits, its effects on entanglement [30,60,61] and teleportation [62] were also studied.…”

Impurity-assisted control of the nonlocal advantage of quantum coherence in the Heisenberg model

“…The control of quantum coherence in a physical system is of special importance for its practical application as the unavoidable interaction of a system with its surrounding environments always induce decoherence [55][56][57]. In particular, as a potential solid-state system for realizing various quantum communication and computation tasks [58][59][60][61][62], the control of entanglement [63], quantum discord [64][65][66], and measurement-induced nonlocality [67][68][69][70][71] for the spin-chain systems have been widely studied. In this work, we investigate the NAQC in the Heisenberg model.…”