Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published March 1, 2019 | Submitted + Published
Journal Article Open

Topological frequency conversion in a driven dissipative quantum cavity

Abstract

Recent work [Martin et al., Phys. Rev. X 7, 041008 (2017)] shows that a spin coupled to two externally supplied circularly polarized electromagnetic modes can effectuate a topological, quantized transfer of photons from one mode to the other. Here, we study the effect in the case when only one of the modes is externally provided, while the other is a dynamical quantum mechanical cavity mode. Focusing on the signatures and stability under experimentally accessible conditions, we show that the effect persists down to the few-photon quantum limit and that it can be used to generate highly entangled "cat states" of cavity and spin. By tuning the strength of the external drive to a "sweet spot," the quantized pumping can arise starting from an empty (zero-photon) cavity state. We also find that inclusion of external noise and dissipation does not suppress but rather stabilizes the conversion effect, even after multiple cavity modes are taken into account.

Additional Information

© 2019 American Physical Society. Received 18 December 2018; revised manuscript received 5 March 2019; published 25 March 2019. F.N. acknowledges financial support from the Villum Foundation and the Danish National Research Foundation. Work at Argonne National Laboratory was supported by the Department of Energy, Office of Science, Materials Science and Engineering Division. G.R. is grateful for support from the Institute of Quantum Information and Matter, an NSF Frontier center funded by the Gordon and Betty Moore Foundation, the Packard Foundation, and from the ARO MURI W911NF-16-1-0361 "Quantum Materials by Design with Electromagnetic Excitation" sponsored by the U. S. Army. I.M. and G.R. are grateful for the hospitality of the Aspen Center for Physics, supported by National Science Foundation Grant No. PHY-1607611.

Attached Files

Published - PhysRevB.99.094311.pdf

Submitted - 1811.02222.pdf

Files

PhysRevB.99.094311.pdf
Files (5.8 MB)
Name Size Download all
md5:b424d0b74a50423c9f9f59b78f10d6a7
1.5 MB Preview Download
md5:5024584f86ea5d52cf4bcc2c73808bde
4.2 MB Preview Download

Additional details

Created:
August 19, 2023
Modified:
October 20, 2023