Journal
OPTICS EXPRESS
Volume 29, Issue 6, Pages 9685-9698Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.417294
Keywords
-
Categories
Funding
- Russian Science Foundation [20-72-10057]
- Russian Science Foundation [20-72-10057] Funding Source: Russian Science Foundation
Ask authors/readers for more resources
Interaction with dephasing reservoirs can contribute to the creation of a long-lived entangled state, with the weight of the subradiant state approaching unity if certain conditions are met. This result opens the door for the creation of entangled states with extended lifetimes, paving the way for practical implementation of quantum computations.
Creation of entangled states of quantum systems with low decoherence rates is a cornerstone in practical implementation of quantum computations. Processes of separate dephasing in each qubit in experimentally feasible systems is commonly accepted to destroy entanglement. In this work, we consider a system of two strongly coupled qubits that interact with dephasing reservoirs. We demonstrate that interaction with dephasing reservoirs can contribute to the formation of a long-lived mixed entangled state with nonzero concurrence. The weight of the subradiant state in this mixed state tends toward unity if the dephasing rate is much larger than the radiative rate and less than the coupling constant between qubits. The lifetime of this state is proportional to the exponent of the ratio of the coupling constant to environmental temperature and can be, by orders of magnitude, larger than the system's characteristic dephasing and dissipation times. Therefore, high dephasing, along with strong coupling, contributes to the creation of an entangled state with a long lifetime. This result paves the way for creation of long-lived entangled states. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available