Revised Title:Molecular Response in One Photon Absorption: Coherent Pulsed Laser vs. Thermal Incoherent Source

Details Revised Title:Molecular Response in One Photon Absorption: Coherent Pulsed Laser vs. Thermal Incoherent Source Revised Title:Molecular Response in One Photon Absorption: Coherent Pulsed Laser vs. Thermal Incoherent Source

2011-08-31

arxiv.org/abs/1109.0026v2

Physics

Quantum Physics

Revised manuscript

Scientific paper

Photoinduced biological processes occur via one photon absorption in weak incoherent CW light. Here, the nature of molecular dynamics induced by single photon absorption from a pulsed coherent laser source and from an incoherent thermal source of electromagnetic radiation are considered using a quantized radiation field. The former is shown to induce time evolution in the molecule, whereas the latter does not. Confusions in the literature regarding this issue are shown to emerge from a lack of appreciation of (a) the proper description of the absorbed photon and of (b) the role of measurement in understanding the process.

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