Quantum Optics and Fundamentals of Physics

Peřina, Jan; Hradil, Z.; Jurčo, Branislav

doi:10.1007/978-94-011-0932-1

Cited by 111 publications

(108 citation statements)

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“…Nonlinear interaction then leads to the spontaneous generation of two down-converted fields (the signal and the idler) which are mutually strongly correlated [1]. Such a correlation can be conveniently described in terms of the two-photon amplitude A 12 which is defined as a matrix element of the product of electric-field operatorsÊ (+) 1 (z 1 , t 1 ) andÊ (+) 2 (z 2 , t 2 ) sandwiched between the entangled two-photon state |ψ (2) (for details, see Appendix A) and the vacuum state |vac :…”

Section: Spontaneous Parametric Down-conversion With An Ultrashormentioning

confidence: 99%

“…Significant consideration has recently been given to the process of spontaneous parametric down-conversion in nonlinear crystals pumped by cw lasers [1,2,3,4]. The nonclassical properties of entangled two-photon light generated by this process have been used in many experimental schemes to elucidate distinctions between the predictions of classical and quantum physics [5].…”

Section: Introductionmentioning

confidence: 99%

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Dispersion in femtosecond entangled two-photon interference

et al. 1999

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We theoretically investigate the quantum interference of entangled two-photon states generated in a nonlinear crystal pumped by femtosecond optical pulses. Interference patterns generated by the polarization analog of the Hong-Ou-Mandel interferometer are studied. Attention is devoted to the effects of the pump-pulse profile (pulse duration and chirp) and the second-order dispersion in both the nonlinear crystal and the interferometer's optical elements. Dispersion causes the interference pattern to have an asymmetric shape. Dispersion cancellation occurs in some cases.

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Section: Spontaneous Parametric Down-conversion With An Ultrashormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dispersion in femtosecond entangled two-photon interference

et al. 1999

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“…The physicists went through a long way from the first pioneering experiments showing basic properties of entangled photon pairs [spectral (temporal) and polarization correlations of photons comprising a pair, see, e.g. [1,2]] to the recent sophisticated experimental setups that demonstrate quantum teleportation [3], quantum cloning [4], test Bell and other nonclassical inequalities [5,6], or generate Greenberger-Horne-Zeilinger states [7]. Usefulness of the fragile entangled photon pairs has also been verified in applications like quantum cryptography [8] and absolute metrology [9] to name a few.…”

Section: Introductionmentioning

confidence: 99%

Quantum properties of counterpropagating two-photon states generated in a planar waveguide

Peřina

2008

Phys. Rev. A

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A nonlinear planar waveguide pumped by a beam orthogonal to its surface may serve as a versatile source of photon pairs. Changing pump-pulse duration, pump-beam transverse width, and angular decomposition of pump-beam frequencies characteristics of a photon pair including spectral widths of signal and idler fields, their time durations as well as degree of entanglement of two fields can be changed significantly. Using the measured spectral widths of the down-converted fields and width of a coincidence-count dip in a Hong-Ou-Mandel interferometer entropy of entanglement can be determined.

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“…These highly correlated particles are favourable for testing many interesting features of quantum mechanics [2].…”

Section: Introductionmentioning

confidence: 99%

Experimental verification of energy correlations in entangled photon pairs

et al. 2003

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Properties of entangled photon pairs generated in spontaneous parametric down-conversion are investigated in interference experiments. Strong energy correlations are demonstrated in a direct way. If a signal photon is detected behind a narrow spectral filter, then interference appears in the Mach-Zehnder interferometer placed in the route of the idler photon, even if the path difference in the interferometer exceeds the coherence length of the light. Narrow time correlations of the detection instants are demonstrated for the same photon-pair source using the Hong-Ou-Mandel interferometer. Both these two effects may be exhibited only by an entangled state.

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Quantum Optics and Fundamentals of Physics

Cited by 111 publications

References 0 publications

Dispersion in femtosecond entangled two-photon interference

Dispersion in femtosecond entangled two-photon interference

Quantum properties of counterpropagating two-photon states generated in a planar waveguide

Experimental verification of energy correlations in entangled photon pairs

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