在等离子体中产生纠缠光子对和量子压缩态
Producing entangled photon pairs and quantum squeezed states in plasmas
AI总结：
本文提出利用等离子体中的相对论四波混频产生偏振纠缠光子对，并通过将泵浦失谐设为两倍等离子体频率来增强相互作用，从而产生强双模压缩态，同时抑制拉曼散射噪声以保持压缩幅度。
摘要：
等离子体能够通过相对论四波混频非线性，将两个泵浦光子转换为两个不同的光子。自发产生的光子对相对于共线泵浦方向以对称角度发射，且当它们具有相同频率时发射率最大。因此，两个正交偏振的泵浦可以通过毫米级均匀等离子体产生偏振纠缠光子对。如果泵浦失谐不同于两倍等离子体频率，则可以避免拉曼散射噪声。另一方面，泵浦失谐恰好等于两倍等离子体频率时，可以显著增强相互作用速率，从而允许产生强双模压缩态。值得注意的是，拉曼散射放大的噪声是相关的，因此可以在其中一个输出正交分量中被抑制，从而保持压缩幅度。
英文摘要：
Plasma is capable of mediating the conversion of two pump photons into two different photons through a relativistic four-wave mixing nonlinearity. Spontaneously created photon pairs are emitted at symmetric angles with respect to the colinear pump direction, and the emission rate is largest if they have identical frequency. Thus, two orthogonally polarized pumps can produce polarization-entangled photon pairs through a mm-long homogeneous plasma. The noise from Raman scattering can be avoided if the pump detuning differs from twice the plasma frequency. On the other hand, pump detuning exactly equal to twice the plasma frequency can significantly enhance the interaction rate, which allows for the production of strong two-mode squeezed states. Remarkably, the amplified noise from Raman scattering are correlated and hence can be suppressed in one of the output quadratures, thereby maintaining the squeezing magnitude.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
