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Trapped Ion Quantum Computing

Deriving the Landauer Principle From the Quantum Shannon Entropy

arXiv
Authors: Henrik J. Heelweg, Amro Dodin, Adam P. Willard

Year

2024

Paper ID

38383

Status

Preprint

Abstract Read

~2 min

Abstract Words

119

Citations

N/A

Abstract

We derive an expression for the equilibrium probability distribution of a quantum state in contact with a noisy thermal environment that formally separates contributions from quantum and classical forms of probabilistic uncertainty. A statistical mechanical interpretation of this probability distribution enables us to derive an expression for the minimum free energy costs for arbitrary (reversible or irreversible) quantum state changes. Based on this derivation, we demonstrate that - in contrast to classical systems - the free energy required to erase or reset a qubit depends sensitively on both the fidelity of the target state and on the physical properties of the environment, such as the number of quantum bath states, due primarily to the entropic effects of system-bath entanglement.

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  • We derive an expression for the equilibrium probability distribution of a quantum state in contact with a noisy thermal environment that formally separates contributions from...

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