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arxiv 2208.01869 v1 pith:4XJ7OBOF submitted 2022-08-03 quant-ph physics.atom-ph

Enhancing spin squeezing using soft-core interactions

classification quant-ph physics.atom-ph
keywords spininteractionssqueezingemerginggeneratedopticalprotocolsoft-core
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose a new protocol for preparing spin squeezed states in controllable atomic, molecular, and optical systems, with particular relevance to emerging optical clock platforms compatible with Rydberg interactions. By combining a short-ranged, soft-core potential with an external drive, we can transform naturally emerging Ising interactions into an XX spin model while opening a many-body gap. The gap helps maintain the system within a collective manifold of states where metrologically useful spin squeezing can be generated at a level comparable to the spin squeezing generated in systems with genuine all-to-all interactions. We examine the robustness of our protocol to experimentally-relevant decoherence and show favorable performance over typical protocols lacking gap protection.

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