A sufficient set of experimentally implementable thermal operations for small systems
Christopher Perry , Piotr Ćwikliński , Janet Anders , Michał Horodecki , Jonathan Oppenheim
AbstractRecent 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.
|Journal series||Physical Review X, ISSN 2160-3308, (A 45 pkt)|
|Publication size in sheets||0.6|
|License||Journal (articles only); published final; ; with publication|
|Score|| = 45.0, ArticleFromJournal|
= 45.0, ArticleFromJournal
|Publication indicators||: 2017 = 3.073; : 2017 = 14.385 (2) - 2017=12.441 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.