Reservoir-engineered spin squeezing: macroscopic even-odd effects and hybrid-systems implementations

Martin Koppenhoefer; Peter Groszkowski; Hoi-Kwan Lau; Aashish A. Clerk

doi:10.1117/12.2616978

9 March 2022 Reservoir-engineered spin squeezing: macroscopic even-odd effects and hybrid-systems implementations

Martin Koppenhoefer, Peter Groszkowski, Hoi-Kwan Lau, Aashish A. Clerk

Proceedings Volume PC12016, Optical and Quantum Sensing and Precision Metrology II; PC120160Q (2022) https://doi.org/10.1117/12.2616978
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We revisit the dissipative approach to producing and stabilizing spin-squeezed states of an ensemble of N two-level systems, providing a detailed analysis of two surprising yet generic features of such protocols. The first is a macroscopic sensitivity of the steady state to whether N is even or odd. We discuss how this effect can be avoided (if the goal is parity-insensitive squeezing), or could be exploited as a new kind of sensing modality to detect the addition or removal of a single spin. The second effect is an anomalous emergent long timescale and a "prethermalized" regime that occurs for even weak single-spin dephasing. We also discuss a general hybrid-systems approach for implementing dissipative spin squeezing that does not require squeezed input light or complex multi-level atoms, but instead makes use of bosonic reservoir-engineering ideas. Our protocol is compatible with a variety of platforms, including trapped ions, NV defect spins coupled to diamond optomechanical crystals, and spin ensembles coupled to superconducting microwave circuits.

Conference Presentation

Citation Download Citation

Martin Koppenhoefer, Peter Groszkowski, Hoi-Kwan Lau, and Aashish A. Clerk "Reservoir-engineered spin squeezing: macroscopic even-odd effects and hybrid-systems implementations", Proc. SPIE PC12016, Optical and Quantum Sensing and Precision Metrology II, PC120160Q (9 March 2022); https://doi.org/10.1117/12.2616978

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