Thermodynamical Cost of Accessing Quantum Information

Details Thermodynamical Cost of Accessing Quantum Information Thermodynamical Cost of Accessing Quantum Information

2004-07-19

arxiv.org/abs/quant-ph/0407151v2

J. Phys. A 38, 7175 (2005)

Physics

Quantum Physics

3 figures

Scientific paper

10.1088/0305-4470/38/32/007

Thermodynamics is a macroscopic physical theory whose two very general laws are independent of any underlying dynamical laws and structures. Nevertheless, its generality enables us to understand a broad spectrum of phenomena in physics, information science and biology. Recently, it has been realised that information storage and processing based on quantum mechanics can be much more efficient than their classical counterpart. What general bound on storage of quantum information does thermodynamics imply? We show that thermodynamics implies a weaker bound than the quantum mechanical one (the Holevo bound). In other words, if any post-quantum physics should allow more information storage it could still be under the umbrella of thermodynamics.

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