If Time-Energy Entangled Photons are so Cool, Why Nobody Uses Them ?

TYPESolid State Institute Seminar
Speaker:Professor Avi Peer
Affiliation:Physics Department and BINA center for nanotechnology, Bar Ilan University, Ramat Gan
Organizer:Associate Professor Oren Cohen
Location:Solid State Auditorium(Entrance)


Time-energy entangled bi-photons (or broadband squeezed light in the continuous version), is in many ways
the  'black  sheep  of  the  family'  in  quantum  information.  Although  broadband  squeezed  light  is  easily
produced with very high optical flux, and demonstrates extreme nonclassical behavior, it is rarely used in
quantum information, mainly because of the inability to efficiently detect it with standard photo-detectors
and homodyne techniques.
I will present our measurement scheme for broadband squeezed light and time energy entangled bi-photons
that is based on quantum interference between the generation amplitudes of bi -photons in two separated
nonlinear  media.  Using  an  optical  nonlinear  medium  as  the  homodyne  device,  we  demonstrated  direct
squeezing detection for ultra-broadband two-mode squeezed light (~80nm bandwidth and ~140THz signalidler  separation),  lifting  the  inherent  bandwidth  limitation  of the  standard  homodyne  measurement  with