Results 261 to 270 of about 3,069,996 (290)

Photon localisation in parametric down-conversion

Quantum Optics: Journal of the European Optical Society Part B, 1989
A full multimode theory for parametric down-conversion is used to calculate the two-photon detection amplitude. From this amplitude a heuristic argument is given for the configuration space extent of the single photons that are involved. These single phonons have a configuration space localisation consistent with an asymptotic fall off with distance r ...
E R Pike, S Sarkar
openaire   +1 more source

Nanoscale Spontaneous Parametric Down-Conversion

OSA Nonlinear Optics 2021, 2021
We generate entangled photons via spontaneous parametric down-conversion (SPDC) in subwavelength films of nonlinear materials and all-dielectric nonlinear metasurfaces. The SPDC spectra reveal resonances: Fabry-Perot in the first case and Mie in the second case.
openaire   +1 more source

Quantum correlations in parametric down-conversion

International Conference on Quantum Information, 2007
We focus on conditional and unconditioned joint distributions of the signal-mode photon numbers in two down-converters on the possible condition that the idler-mode photon number is known. Respective negative and positive correlations are explained.
V. Peřinová, A. Lukš
openaire   +1 more source

Interferometry of spontaneous parametric down conversion

Technical Digest. Summaries of papers presented at the Quantum Electronics and Laser Science Conference. Postconference Technical Digest (IEEE Cat. No.01CH37172), 2002
Summary form only given. The interference of spontaneous radiation emitted from two macroscopic regions (a nonlinear analogy of the Mach-Zehnder interferometer) is considered. The interferometer is based on two nonlinear crystals, excited in series by a common laser pump. The crystals are separated by a layer with an unknown dispersion law.
D.Y. Korystov, S.P. Kulik, S.V. Ivanchenko, A.N. Penin   +3 more
openaire   +1 more source

A single photon source using parametric down conversion

2003 European Quantum Electronics Conference. EQEC 2003 (IEEE Cat No.03TH8665), 2003
Experimental realization of a gated parametric down conversion (GPDC) and the achievement of the highest value of P(1) (probability to find one photon in certain output pulse) among the reported single photon sources as far as the authors' knowledge, is presented.
Shigeki Takeuchi, Ryo Okamoto, Keiji Sasaki   +2 more
openaire   +1 more source

Quantum entanglement swapping with spontaneous parametric down conversion

SPIE Proceedings, 2003
Two remote parties that have never interacted each other can be entangled through entanglement swapping operation done by a third party. Currently existing entanglement swapping experiments are done probabilistically by postselection, i.e., once a successful swapping is verified, the resultant entanglement is destructed.
Xiang-Bin Wang, B. S. Shi, A. Tomita, K. Matsumoto   +3 more
openaire   +1 more source

Phase tristability in parametric three-photon down-conversion

Optics Letters, 2020
This Letter shows that the parametric processes of spontaneous three-photon down-conversion is accompanied by phase tristability of the sub-harmonic signal. The oscillations of the signal in a resonant cavity are modeled through an analytically solvable second-order nonlinear oscillator.
openaire   +2 more sources

SCALING PROPERTIES OF MULTIPARTITE ENTANGLEMENT IN PARAMETRIC DOWN-CONVERSION

International Journal of Quantum Information, 2011
We quantify and compare the quantum multipartite entanglement generated in two different physical systems involving parametric down-conversion of a multimode pumping field. In particular, we focus our attention on its scaling properties with respect to the number N of modes involved in the processes.
Patera, Giuseppe, Kolobov, Mikhail I.
openaire   +2 more sources

Down-conversion processes and the parametric approximation

Optics Communications, 1995
It is shown that the applicability of the parametric approximation to the processes of photon down-conversion depends on the value of frequency detuning between pump and signal field modes. It is found that for the multi-photon down-conversion processes the threshold value of detuning exists.
openaire   +1 more source

Chirped pulses and squeezing in parametric down-conversion

Physical Review A, 1988
, Ekert, , Rzaewski
openaire   +2 more sources