Phys. Rev. Lett. 101, 033602 (2008) [4 pages]Fundamental Quantum Limit to the Multiphoton Absorption Rate for Monochromatic LightReceived 4 February 2008; published 17 July 2008 The local multiphoton absorption rate for an arbitrary quantum state of monochromatic light, taking into account the photon number, momentum, and polarization degrees of freedom, is shown to have an upper bound that can be reached by coherent fields. This surprising result rules out any quantum enhancement of the multiphoton absorption rate by momentum entanglement. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.033602
DOI:
10.1103/PhysRevLett.101.033602
PACS:
42.50.Ar, 42.50.Dv, 42.50.St
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