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DTSTART:20260609T080000Z
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TRANSP:OPAQUE
LOCATION:ICFO Auditorium
SUMMARY:ICFO | PHILIPP STAMMER
CLASS:PUBLIC
DESCRIPTION:Photons and Information are notions indispensable for modern qu
 antum technologies\, and their interplay provides the foundation of unders
 tanding the quantum nature of light. In particular\, photons are robust in
 formation carrier and substantiate the inherent discreteness of the electr
 omagnetic radiation field. The information of photons\, and their intrinsi
 c quantum fluctuations\, are manifested in the measurement of correlation 
 functions of the field. Central to the understanding of photon fluctuation
 s is the quantum theory of optical coherence\, and the photon signature ca
 n reveal itself in different properties. Furthermore\, the measurement of 
 correlations is needed from an information theoretic perspective to distin
 guish classical from quantum signatures. These concepts ultimately lead to
  the original goal of the present Thesis:\nHow can we understand the notio
 n of photons and information in a modern strong field quantum optics persp
 ective?\nStrong field quantum optics aims for the generation\, characteriz
 ation and the control of quantum light\, beyond the conventional wisdom of
  strong field physics. In the traditional approach to strong field phenome
 na\, in particular the photon up-conversion process of high-order harmonic
  generation\, the field was merely treated classically. And hence\, the no
 tion of the photon could not exist in such descriptions. However\, recent 
 advances in the field of strong field quantum optics have revealed new sig
 natures unaccountable by classical theory. This includes the generation of
  genuine non-classical states of light from strong field phenomena\, revea
 ling the intrinsic entanglement between all field modes in the process of 
 high-order harmonic generation\, or finding quantum signatures in the phot
 on emission process itself via photon anti-bunching. In this Thesis\, we r
 eveal all such properties of the generated light field\, and establish the
  underlying theories for the description of these phenomena. This includes
  the development of the quantum theory of optical coherence for high-order
  harmonic generation\, as well as introducing new quantum information theo
 retic perspectives to strong field quantum optics. Therefore\, the work pr
 esented in this Thesis provides the foundation for the modern formulation 
 of quantum optical phenomena in strong field physics.\nThesis Director: Pr
 of. Dr. Maciej Lewenstein
DTSTAMP:20260603T211729Z
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