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SUMMARY:M.V. Fedorov
DTSTART:20240906T130000Z
DTEND:20240906T133000Z
DTSTAMP:20260423T005646Z
UID:QOART/26
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/QOART/26/">V
 ariations of the degree of angular entanglement in noncollinear regimes of
  Spontaneous Parametric Down-Conversion (SPDC)</a>\nby M.V. Fedorov as par
 t of Quantum Optics and Related Topics\n\n\nAbstract\nAs known\, the proce
 ss of Spontaneous Parametric Down-Conversion in birefringent crystals (SPD
 C) produces states of photon pairs [1-3] which can be entangled. The varia
 bles of the biphoton wave function can be different and characterizing dif
 ferent degrees of freedom of photons: their polarizations\, or propagation
  angles\, or frequencies of photons ω1 and ω2. In the last case one can 
 speak about spectral entanglement of sates characterized by the wave funct
 ion Ψ(ω1\, ω2). The phenomenon of spectral entanglement and its degree 
 were rather thoroughly investigated in the work [4]\, both theoretically a
 nd experimentally . On the other hand\, the double Fourier transformation 
 of Ψ(ω1\, ω2) gives the temporal biphoton wave function Φ(t1\, t2)\, i
 n which the time variables t1 and t2 can be interpreted as the arrival tim
 es of photons to detectors. In terms of the temporal wave function Φ(t1\,
  t2) one can speak about temporal entanglement of biphoton states\, which 
 is discussed in this talk.\n\n1. D.N. Klyshko\, JETP Lett\, 6\, 90 (1967).
 \n\n2. S.E. Harris\, M.K. Oshman\, and R.L. Byer\, PRL\, 18\, 732 (1967).\
 n\n3. D. Magde\, H. Marr\, PRL\, 18\, 905 (1967).\n\n4. G. Brida\, V. Cari
 cato\, M.V. Fedorov\, M. Genovese\, S.P. Kulik\, EPL\, 87\, 64003 (2009).\
 n
LOCATION:https://researchseminars.org/talk/QOART/26/
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