Entanglement distillation from Gaussian input states by coherent photon addition
Abstract
The entanglement between Gaussian entangled states can be increased by non-Gaussian operations. We design a new scheme named coherent photon addition, which can coherently add one photon generated by spontaneous parametric down conversation process to Gaussian quadrature-entangled light pulses created by a non-degenerate optical parametric amplifier. This operation can increase the entanglement of input two-mode Gaussian states as an entanglement distillation, and provides us a new method of non-Gaussian operation. This scheme can also help us to study the decoherence of adding one to two-mode Gaussian states from coherent photon addition to normal photon addition.
- Publication:
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arXiv e-prints
- Pub Date:
- September 2009
- DOI:
- 10.48550/arXiv.0909.3282
- arXiv:
- arXiv:0909.3282
- Bibcode:
- 2009arXiv0909.3282Z
- Keywords:
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- Quantum Physics;
- Physics - Optics
- E-Print:
- 5 pages, 1 figures