Magnetic field induced symmetry breaking in nonequilibrium quantum networks
Name
Thingna_2020_New_J._Phys._22_083026.pdf
Description
Published version
Size
1.94 MB
Format
Unknown
Checksum (MD5)
fdd07e994c650d6430385b2c5a2c6e8e
Author(s)
Thingna, Juzar
Manzano, Daniel
Cao, Jianshu
Date Issued
August 2020
Journal
New Journal of Physics
Publisher
IOP Publishing
Citation
Thingna, Juzar, Manzano, Daniel and Cao, Jianshu. 2020. "Magnetic field induced symmetry breaking in nonequilibrium quantum networks." New Journal of Physics, 22 (8).
Version
Final published version
Abstract
© 2020 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. We study the effect of an applied magnetic field on the nonequilibrium transport properties of a general cubic quantum network described by a tight-binding Hamiltonian with specially designed couplings to the leads that preserve open-system symmetries. We demonstrate that the symmetry of open systems can be manipulated by the direction of the magnetic field. Starting with all the symmetries preserved in absence of a field, the anisotropic and isotropic fields systematically break the symmetries, influencing all nonequilibrium properties. For simple cubic systems, we are able to identify the steady states that comprise of pure states, bath-dependent states (nonequilibrium steady states), and also nonphysical states. As an application, we show numerically for large cubic networks that the symmetry breaking can control nonequilibrium currents and that different environmental interactions can lead to novel features which can be engineered in artificial super-lattices and cold atoms.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/1367-2630/aba0e4
