Quantum decoherence with the Unruh single-particle state having right and left components

Abstract

We investigate the effects of quantum decoherence generated by the Unruh effect in non-inertial frames under an amplitude damping channel and a phase damping channel, respectively, when the Unruh single particle has right and left components. We not only consider the influence of acceleration on entanglement, but also consider the influence of different rates between right and left components of the Unruh single-particle state on entanglement. We find that when the Unruh single-particle state has right and left components, i.e. |1⟩_U = q _L|0⟩_I|1⟩_II + q _R|1⟩_I|0⟩_II, |q _R|² + |q _L|² = 1, with q _L ≠ 0, there appears the sudden death of entanglement, which occurs earlier under both the amplitude damping channel and the phase damping channel with the increase of acceleration than that when the Unruh single-particle state only has a right component (q _R = 1, q _L = 0). We also find that the initial entanglement decreases with decrease of q _R from 1 to 1/2^1/2.

Keywords:

• quantum decoherence
• amplitude damping
• phase damping
• non-inertial frames

Acknowledgements

This project was supported by the National Natural Science Foundation of China under Grant Nos. 11064016 and 61068001.