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quant-ph2020★ 5 cited
Parametrized protocol achieving the Heisenberg limit in the optical domain via dispersive atom-light interactions
Yuguo Su, Xiaoguang Wang
The strong and collective atom-light interactions in cavity-QED systems perform manifold benefits in quantum-enhanced measurements. Here, we study the time-reversal protocol that h…
quant-ph2020★ 9 cited
Spin squeezing and concurrence under Lee-Yang dephasing channels
Yuguo Su, Hongbin Liang, Xiaoguang Wang
The Lee-Yang zeros are one-to-one mapping to zeros in the coherence of a probe spin coupled to a many-body system. Here, we study the spin squeezing under two different types of Le…