On the role of the optical phase and quantum coherence in high harmonic
generation
- URL: http://arxiv.org/abs/2309.05010v3
- Date: Thu, 30 Nov 2023 17:03:11 GMT
- Title: On the role of the optical phase and quantum coherence in high harmonic
generation
- Authors: Philipp Stammer
- Abstract summary: We consider driving the process of high harmonic generation with incoherent classical and non-classical intense light fields.
We show that harmonic radiation can be generated even in cases where the phase of the driving field is completely undetermined.
- Score: 0.0
- License: http://creativecommons.org/licenses/by-sa/4.0/
- Abstract: In this work we analyze the role of the optical phase and coherence of the
driving field in the process of high harmonic generation. We consider driving
the process of high harmonic generation with incoherent classical and
non-classical intense light fields, and show that harmonic radiation can be
generated even in cases where the phase of the driving field is completely
undetermined leading to vanishing mean electric field values. This implies that
quantum optical coherence in the driving field is not necessary for generating
high harmonic radiation, with the consequence that the emitted harmonic
radiation in those cases do likewise not exhibit quantum optical coherence. We
further show that the final quantum state of each harmonic is diagonal in the
photon number basis, from which we conclude that the measurement of the high
harmonic spectrum alone does not allow to infer on the coherence properties of
the harmonic radiation.
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