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Topological frequency conversion in a driven dissipative quantum cavity

Nathan, Frederik and Martin, Ivar and Refael, Gil (2019) Topological frequency conversion in a driven dissipative quantum cavity. Physical Review B, 99 (9). Art. No. 094311. ISSN 2469-9950. doi:10.1103/PhysRevB.99.094311.

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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.

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URLURL TypeDescription Paper
Martin, Ivar0000-0002-2010-6449
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.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Villum FoundationUNSPECIFIED
Danish National Research FoundationUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Army Research Office (ARO)W911NF-16-1-0361
Issue or Number:9
Record Number:CaltechAUTHORS:20190325-132537557
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:94123
Deposited By: Tony Diaz
Deposited On:25 Mar 2019 20:53
Last Modified:16 Nov 2021 17:02

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