Super dense coding in one-axis twisting model
نویسندگان
چکیده
منابع مشابه
Spin squeezing in a generalized one-axis twisting model
We investigate the dependence of spin squeezing on the polar angle of the initial coherent spin state |θ0, φ0〉 in a generalized one-axis twisting model, where the detuning δ is taken into account. We show explicitly that regardless of δ and φ0, previous results of the ideal one-axis twisting is recovered as long as θ0 = π/2. For a small departure of θ0 from π/2, however, the achievable variance...
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We investigate the quantum Fisher information (QFI) of symmetric states for spin-s particles. We derive the maximal QFI, and find that quantum spin correlations are essential ingredients of the maximal QFI. We make applications to the generalized one-axis twisting model. The results show that the redistributions of uncertainties on the basis of the quantum correlations in the multiqubit system ...
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We present a detailed analysis of spin squeezing of the one-axis twisting model with a many-body phase dephasing, which is induced by external field fluctuation in a two-mode Bose-Einstein condensates. Even in the presence of the dephasing, our analytical results show that the optimal initial state corresponds to a coherent spin state |θ0, φ0〉 with the polar angle θ0 = π/2. If the dephasing rat...
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ژورنال
عنوان ژورنال: Revista Mexicana de Física
سال: 2020
ISSN: 2683-2224,0035-001X
DOI: 10.31349/revmexfis.66.356