8.5.2017 13.15-14.00 QA,
(University of Hannover)
Fundamental energy costs for quantum erasure and quantum measurement
Landauer's Principle concerns the energy cost for erasing information, and establishes a fundamental relation between thermodynamics and information theory. I will explain its importance, and then present a precise statement and proof of it, employing a microscopic picture rather than the usual thermodynamic argumentation. This formulation yields novel improvements of the usual Landauer's
In the second part of my talk, I will look at the energy costs of another primitive quantum operation, namely quantum measurements. The most relevant result in this direction is a strong bound on the energy cost of projective measurements. Its derivation rests on the full Stinespring-like implementation, whereas the usual state-transformation approach from thermodynamics does not suffice. We finally apply this result to determine the energy costs of actual quantum error correction and Zeno control protocols.
Talk based on arXiv:1306.4352 and arXiv:1609.06981.