Controlling decoherence via $\mathcal{PT}$-symmetric non-Hermitian open quantum systems
Quantum Physics
2019-09-11 v1
Abstract
We have studied the effect of a non-Hermitian Bosonic bath on the dynamics of a two-level spin system. The non-Hermitian Hamiltonian of the bath is chosen such that it converges to the harmonic oscillator Hamiltonian when the non-Hermiticity is switched off. We calculate the dynamics of the spin system and found that the non-Hermiticity can have positive as well as negative effects on the coherence of the system. However, the decoherence can be completely eliminated by choosing the non-Hermiticity parameter and the phase of the system bath interaction appropriately. We have also studied the effect of this bath on the entanglement of a two-spin system when the bath is acting only on one spin.
Cite
@article{arxiv.1907.11088,
title = {Controlling decoherence via $\mathcal{PT}$-symmetric non-Hermitian open quantum systems},
author = {Sanjib Dey and Aswathy Raj and Sandeep K. Goyal},
journal= {arXiv preprint arXiv:1907.11088},
year = {2019}
}
Comments
7 pages, 1 figure