A sufficient set of experimentally implementable thermal operations for small systems

Christopher Perry , Piotr Ćwikliński , Janet Anders , Michał Horodecki , Jonathan Oppenheim


Recent work using tools from quantum information theory has shown that for small systems where quantum effects become prevalent, there is not one thermodynamical second law but many. Derivations ofthese laws assume that an experimenter has very precise control of the system and heat bath. Here we show that these multitude of laws can be saturated using two very simple operations: changing the energy levels of the system and thermalizing over any two system energy levels. Using these two operations, one candistill the optimal amount of work from a system, as well as perform the reverse formation process. What ismore, using only these two operations and one ancilla qubit in a thermal state, one can transform any stateinto any other state allowable by the second laws. We thus have the result that the second laws hold for fine-grained manipulation of system and bath, but can be achieved using very coarse control. This brings the fullarray of thermal operations towards a regime accessible by experiment, and establishes the physicalrelevance of these second laws, potentially opening a new direction of studies.
Author Christopher Perry
Christopher Perry,,
, Piotr Ćwikliński (FMPI / ITPA)
Piotr Ćwikliński,,
- Institute of Theoretical Physics and Astrophysics
, Janet Anders
Janet Anders,,
, Michał Horodecki (FMPI / ITPA)
Michał Horodecki,,
- Institute of Theoretical Physics and Astrophysics
, Jonathan Oppenheim
Jonathan Oppenheim,,
Journal seriesPhysical Review X, ISSN 2160-3308, (A 45 pkt)
Issue year2018
Publication size in sheets0.6
ASJC Classification3100 General Physics and Astronomy
URL https://journals.aps.org/prx/pdf/10.1103/PhysRevX.8.041049
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)45
ScoreMinisterial score = 45.0, ArticleFromJournal
Ministerial score (2013-2016) = 45.0, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 3.073; WoS Impact Factor: 2017 = 14.385 (2) - 2017=12.441 (5)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.