The Quantum State of an Ideal Propagating Laser Field

Details The Quantum State of an Ideal Propagating Laser Field The Quantum State of an Ideal Propagating Laser Field

2001-04-08

arxiv.org/abs/quant-ph/0104036v3

PRL 88, 027902 (2002)

Physics

Quantum Physics

4 pages RevTeX, to appear in PRL. For an extended version see quant-ph/0111157

Scientific paper

10.1103/PhysRevLett.88.027902

We give a quantum information-theoretic description of an ideal propagating CW laser field and reinterpret typical quantum-optical experiments in light of this. In particular we show that contrary to recent claims [T. Rudolph and B. C. Sanders, Phys. Rev. Lett. 87, 077903 (2001)], a conventional laser can be used for quantum teleportation with continuous variables and for generating continuous-variable entanglement. Optical coherence is not required, but phase coherence is. We also show that coherent states play a priveleged role in the description of laser light.

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