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Journal Article

Entanglement rate for Gaussian continuous variable beams


Marquardt,  Florian
Marquardt Group, Associated Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Deng, Z. J., Habraken, S. J. M., & Marquardt, F. (2016). Entanglement rate for Gaussian continuous variable beams. New Journal of Physics, 18: 063022. doi:10.1088/1367-2630/18/6/063022.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-62B3-5
We derive a general expression that quantifies the total entanglement production rate in continuous variable systems, where a source emits two entangled Gaussian beams with arbitrary correlators. This expression is especially useful for situations where the source emits an arbitrary frequency spectrum, e.g. when cavities are involved. To exemplify its meaning and potential, we apply it to a four-mode optomechanical setup that enables the simultaneous up- and down-conversion of photons from a drive laser into entangled photon pairs. This setup is efficient in that both the drive and the optomechanical up- and down-conversion can be fully resonant.