5 research outputs found
Effects of mismatched transmissions on two-mode squeezing and EPR correlations with a slow light medium
We theoretically discuss the preservation of squeezing and continuous
variable entanglement of two mode squeezed light when the two modes are
subjected to unequal transmission. One of the modes is transmitted through a
slow light medium while the other is sent through an optical fiber of unit
transmission. Balanced homodyne detection is used to check the presence of
squeezing. It is found that loss of squeezing occurs when the mismatch in the
transmission of the two modes is greater than 40% while near ideal squeezing is
preserved when the transmissions are equal. We also discuss the effect of this
loss on continuous variable entanglement using strong and weak EPR criteria and
possible applications for this experimental scheme.Comment: 7 pages, 4 figure
Ghost Interference with Optical Parametric Amplifier
The 'Ghost' interference experiment is analyzed when the source of entangled
photons is a multimode Optical Parametric Amplifier(OPA) whose weak limit is
the two-photon Spontaneous Parametric Downconversion(SPDC) beam. The visibility
of the double-slit pattern is calculated, taking the finite coincidence time
window of the photon counting detectors into account. It is found that the
coincidence window and the bandwidth of light reaching the detectors play a
crucial role in the loss of visibility on coincidence detection, not only in
the 'Ghost' interference experiment but in all experiments involving
coincidence detection. The differences between the loss of visibility with
two-mode and multimode OPA sources is also discussed.
PACS: 42.65.Yj, 42.50.Dv, 42.65.L
Linear optical quantum information processing, imaging, and sensing
We investigate linear optical approaches to quantum information processing, clarifying how linear optics and projective measurements can be used to create designer optical nonlinearities at the few photon level. We apply the lessons learned to develop optimized schemes for generating entangled photonic states for quantum imaging, with super-resolution below the Rayleigh limit, and for quantum sensing, with supersensitivity below the shot-noise limit. © OSA