منابع مشابه
Spin squeezing in nonlinear spin-coherent states
We introduce the nonlinear spin-coherent state (SCS) via its ladder operator formalism and propose a type of nonlinear SCS by the nonlinear time evolution of the SCS. By a new version of spectroscopic squeezing criteria we study the spin squeezing in both the SCS and the nonlinear SCS. The results show that the SCS is not squeezed in the x, y and z directions, and the nonlinear SCS may be squee...
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Using ultrashort laser pulses, we have observed quadrature squeezing and parametric gain in quasi-phase-matched KTiOPO(4) waveguides. Using a local oscillator pulse that is 2.5 times shorter than the squeezed pulse, we observed noise reduction of 12 +/- 1% below the shot-noise level. Parametric amplification and deamplification of a coherent seed pulse have also been observed, with no indicatio...
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corresponds to interaction with external coherent field. We assume here that the nonlinearity constants χ , characterizing three oscillators, are identical. Moreover, interaction strengths between modes 1− 2 and 2− 3 are described by the same parameter ǫ, whereas external excitations in the modes 1 and 3 by α. We show that for weak excitation regime, our model behaves as three–mode nonlinear qu...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2019
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.122.090503