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Open Quantum Systems Decoherence
Decoherence in a mathcal{PT}-symmetric qubit
arXiv
Authors: Junaid Majeed Bhat, Muzaffar Qadir Lone, Sanjoy Datta, Ahmad Farouk
Year
2017
Paper ID
24648
Status
Preprint
Abstract Read
~2 min
Abstract Words
98
Citations
N/A
Abstract
We investigate the decoherence in a mathcal{PT}-symmetric qubit coupled with a bosonic bath. Using cannonical transformations, we map the non-Hermitian Hamiltonian representing themathcal{PT}-symmetric qubit to a spin boson model. Identifying the parameter α that demarcates the hermiticity and non-hermiticity in the model, we show that the qubit does not decohere at the transition from real eigen spectrum to complex eigen spectrum. Using a general class of spectral densities, the strong suppression of decoherence is observed due to both vaccum and thermal fluctuations of the bath, and initial correlations as we approach the transition point.
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- This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
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- We investigate the decoherence in a mathcalPT-symmetric qubit coupled with a bosonic bath.
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