Manipulating the flow of thermal noise in quantum devices Journal Article

Author(s): Barzanjeh, Shabir; Aquilina, Matteo; Xuereb, André
Article Title: Manipulating the flow of thermal noise in quantum devices
Affiliation IST Austria
Abstract: There has been significant interest recently in using complex quantum systems to create effective nonreciprocal dynamics. Proposals have been put forward for the realization of artificial magnetic fields for photons and phonons; experimental progress is fast making these proposals a reality. Much work has concentrated on the use of such systems for controlling the flow of signals, e.g., to create isolators or directional amplifiers for optical signals. In this Letter, we build on this work but move in a different direction. We develop the theory of and discuss a potential realization for the controllable flow of thermal noise in quantum systems. We demonstrate theoretically that the unidirectional flow of thermal noise is possible within quantum cascaded systems. Viewing an optomechanical platform as a cascaded system we show here that one can ultimately control the direction of the flow of thermal noise. By appropriately engineering the mechanical resonator, which acts as an artificial reservoir, the flow of thermal noise can be constrained to a desired direction, yielding a thermal rectifier. The proposed quantum thermal noise rectifier could potentially be used to develop devices such as a thermal modulator, a thermal router, and a thermal amplifier for nanoelectronic devices and superconducting circuits.
Journal Title: Physical Review Letters
Volume: 120
Issue 6
ISSN: 1079-7114
Publisher: American Physical Society  
Date Published: 2018-02-07
Start Page: Article number: 060601
DOI: 10.1103/PhysRevLett.120.060601
Notes: We acknowledge funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 732894 (FETPRO HOT). S. B. acknowledges support under the Marie Skłodowska-Curie Actions programme, Grant Agreement No. 707438 (MSCA-IF-EF-ST SUPEREOM).
Open access: yes (OA journal)