Dephasing effects on quantum correlations and teleportation in presence
of state dependent bath
- URL: http://arxiv.org/abs/2307.01104v1
- Date: Mon, 3 Jul 2023 15:31:19 GMT
- Title: Dephasing effects on quantum correlations and teleportation in presence
of state dependent bath
- Authors: Mehboob Rashid, Muzaffar Qadir Lone, Prince A Ganai
- Abstract summary: We analyze the effect of state dependent bath on the quantum correlations and the fidelity of a single qubit teleportation.
It is shown that due to the presence of initial system-bath correlations, the system maintains quantum correlations for long times.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum information protocols are often designed in the ideal situation with
no decoherence. However, in real setup, these protocols are subject to the
decoherence and thus reducing fidelity of the measurement outcome. In this
work, we analyze the effect of state dependent bath on the quantum correlations
and the fidelity of a single qubit teleportation. We model our system-bath
interaction as qubits interacting with a common bath of bosons, and the state
dependence of the bath is generated through a projective measurement on the
joint state in thermal equilibrium. The analytic expressions for the time
evolution of entanglement, Negativity and average fidelity of quantum
teleportation are calculated. It is shown that due to the presence of initial
system-bath correlations, the system maintains quantum correlations for long
times. Furthermore, due to the presence of finite long time entanglement of the
quantum channel, the average fidelity is shown to be higher than its classical
value.
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