Dark‐State Induced Quantum Nonreciprocity
Abstract
With the development of quantum technologies and their broad applications, the phenomenon of reciprocity breaking has been evolving from an effective tool in classical wave optics and electrodynamics to a promising instrument also for the field of quantum computing and quantum information processing. In this work, nonreciprocal wave phenomena that arise in atom‐like quantum systems are studied. Different approaches to isolation and nonreciprocity in quantum systems are reviewed, with a focus on a specific class of passive devices where nonreciprocity is induced by the system nonlinearity, without the need of an external bias. It is then discussed how to model these effects and what their underlying physics is, outlining how the existence of a slowly‐decaying subradiant state is critical to obtain large nonreciprocal responses. The susceptibility of these devices to changes in the environment is analyzed, together with the opportunities that come from including temporal modulations.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 28, 2022
- Source ID
- 10.1002/qute.202100112
Entities
People
- Alex Krasnok
- Andrea Alù
- Michele Cotrufo
- Nikita Nefedkin
Organizations
- Air Force Office of Scientific Research
- City University of New York
- Florida International University
- Simons Foundation