Native spin-changing collisions plus arbitrary quadratic Zeeman shift produce universal OAT-scalable spin squeezing in spin-1 BECs, freezable by turning the shift off.
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The authors identify distinct regimes for QND measurement squeezing (short times) and deterministic squeezing (longer times) via the ratio of tensor to vector light shifts, predicting a spin variance of 0.03 in 50 ms for Yb-173.
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Universal spin-squeezing dynamics in spinor condensates
Native spin-changing collisions plus arbitrary quadratic Zeeman shift produce universal OAT-scalable spin squeezing in spin-1 BECs, freezable by turning the shift off.
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Deterministic nuclear spin squeezing and squeezing by continuous measurement using vector and tensor light shifts
The authors identify distinct regimes for QND measurement squeezing (short times) and deterministic squeezing (longer times) via the ratio of tensor to vector light shifts, predicting a spin variance of 0.03 in 50 ms for Yb-173.