Related papers: Single-Atom Verification of the Information-Theoretical Bound of Irreversibility at the Quantum Level

Single-Atom Verification of the Information-Theoretical Bound of Irreversibility at the Quantum Level

URL: http://arxiv.org/abs/2007.02027v1
Date: Sat, 4 Jul 2020 07:20:31 GMT
Title: Single-Atom Verification of the Information-Theoretical Bound of Irreversibility at the Quantum Level
Authors: J. W. Zhang, K. Rehan, M. Li, J. C. Li, L. Chen, S.-L. Su, L.-L. Yan, F. Zhou and M. Feng
Abstract summary: In a quantum mechanical fashion, we report the first theoretical prediction and experimental exploration of an information-theoretical bound on the entropy production. Our finding is fundamental to any quantum thermodynamical process and indicates much difference and complexity in quantum thermodynamics with respect to the conventionally classical counterpart.
Score: 0.11242503819703256
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Quantitative measure of disorder or randomness based on the entropy production characterizes thermodynamical irreversibility, which is relevant to the conventional second law of thermodynamics. Here we report, in a quantum mechanical fashion, the first theoretical prediction and experimental exploration of an information-theoretical bound on the entropy production. Our theoretical model consists of a simplest two-level dissipative system driven by a purely classical field, and under the Markovian dissipation, we find that such an information-theoretical bound, not fully validating quantum relaxation processes, strongly depends on the drive-to-decay ratio and the initial state. Furthermore, we carry out experimental verification of this information-theoretical bound by means of a single spin embedded in an ultracold trapped $^{40}$Ca$^{+}$ ion. Our finding, based on a two-level model, is fundamental to any quantum thermodynamical process and indicates much difference and complexity in quantum thermodynamics with respect to the conventionally classical counterpart.

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