%0 Generic %1 groszkowski2021reservoirengineered %A Groszkowski, Peter %A Koppenhöfer, Martin %A Lau, Hoi-Kwan %A Clerk, A. A. %D 2021 %K squeezing theory %T Reservoir-engineered spin squeezing: macroscopic even-odd effects and hybrid-systems implementations %U http://arxiv.org/abs/2104.10363 %X 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 with single-spin sensitivity. 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.

@misc{groszkowski2021reservoirengineered, 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 with single-spin sensitivity. 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.}, added-at = {2021-05-17T09:53:17.000+0200}, author = {Groszkowski, Peter and Koppenhöfer, Martin and Lau, Hoi-Kwan and Clerk, A. A.}, biburl = {https://www.bibsonomy.org/bibtex/2ff79e48231eb33ea2a642fc08e1ee21b/marschu}, interhash = {e1e6e6f3073e3451b2876322e5346b11}, intrahash = {ff79e48231eb33ea2a642fc08e1ee21b}, keywords = {squeezing theory}, note = {cite arxiv:2104.10363Comment: 13+10 pages}, timestamp = {2021-05-17T09:53:17.000+0200}, title = {Reservoir-engineered spin squeezing: macroscopic even-odd effects and hybrid-systems implementations}, url = {http://arxiv.org/abs/2104.10363}, year = 2021 }