Protecting Spin Squeezing with Square Noise

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• 作者：Ji-Ying Zhang ; Yong-Chang Zhang ; Shan Wu…
• 关键词：Squeezed spin states ; Square noise ; Pulse sequence
• 刊名：International Journal of Theoretical Physics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：56
• 期：2
• 页码：521-529
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics, general; Quantum Physics; Elementary Particles, Quantum Field Theory; Theoretical, Mathematical and Computational Physics;
• 出版者：Springer US
• ISSN：1572-9575
• 卷排序：56

文摘

Here we provide two schemes to eliminate the square noise in the collective angular momentum during the generation of one-axis twisting (OAT) squeezed spin states (SSSs) by using the Radio frequency (RF) pulses. The first scheme can effectively overcome the detrimental noise and gives us a bare OAT Hamiltonian at last. The second one may also remove the noise well enough and finally offers us a two-axis twisting (TAT) Hamiltonian. In other words, it can both protect and enhance the OAT Hamiltonian. The corresponding theoretical analysis and numerical simulations are presented in the paper.