Maxwell's Demons and Quantum Refrigerators in Superconducting Circuits

Datum

22.02.2017

Zeit

14:00 - 15:00

Sprache

en

Hauptthema

Physik

Andere Themen

Physik

Host

Jukka Pekola (Aalto University)

Beschreibung

I present experiments on superconducting nano-circuits, which test the role of information in thermodynamics. Two types of Maxwell's demons (MD), a Szilard’s Engine and an autonomous MD, were realized based on single electrons. Ideally they extract heat and do work equal to kT log(2) per operation cycle, in accordance with the Landauer principle for the cost of erasing a single bit in computation. In our experiments we achieve 75% of this bound per cycle, and the missing efficiency can be quantitatively accounted for by assigning the entropy of mutual information, due to incomplete measurement, on the same footing as other contributions of entropy. In the second part of the talk I present quantum heat engine (refrigerator) based on a superconducting qubit.

Letztmalig verändert: 22.02.2017, 08:53:03