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A double-Gaussian model and the Schmidt modes are found for the biphoton wave function characterizing spontaneous parametric down-conversion with the degenerate collinear phase-matching of the type I and with a pulsed pump. The obtained…

Quantum Physics · Physics 2015-05-13 M. V. Fedorov , Yu. M. Mikhailova , P. A. Volkov

We describe one-dimensional photonic crystals that support a guided mode suitable for atom trapping within a unit cell, as well as a second probe mode with strong atom-photon interactions. A new hybrid trap is analyzed that combines optical…

Optics · Physics 2013-09-17 C. -L. Hung , S. M. Meenehan , D. E. Chang , O. Painter , H. J. Kimble

We present a theory to describe the instantaneous emission rate of electron transport in quantum-coherent conductors. Due to the Pauli exclusion principle, electron emission events are usually correlated. This makes the emission rate is not…

Mesoscale and Nanoscale Physics · Physics 2023-06-14 Y. Yin

We demonstrate paired generation of a single photo-electron in a quantum dot and a single photon from a single polarization-entangled photon pair that is generated by spontaneous parametric down conversion. The electron is reated in a GaAs…

The temperature dependence of the refractive indices of potassium titanyl phosphate (KTP) are shown to enable quasi-phasematched type II spontaneous parametric downconversion (SPDC) with low temperature sensitivity. Calculations show the…

Quantum Physics · Physics 2021-08-11 Xin-Yi Pan , Christian Kurtsiefer , Alexander Ling , James A. Grieve

Over the last few decades, the predominant strategies for controlling spontaneous emission have involved tailoring the spatial surroundings of quantum emitters or atoms to create resonant or spatially periodic photonic structures. However,…

The construction of a single photon source using gated parametric fluorescence is reported with the measurement results of the photon number distribution. A beamlike twin-photon method is used in order to achieve high collection efficiency.…

Quantum Physics · Physics 2009-11-10 Shigeki Takeuchi , Ryo Okamoto , Keiji Sasaki

The LPM suppression of photon emission rates from the quark gluon plasma have been studied at different physical conditions of the plasma given by temperature and chemical potentials.The integral equation for the transverse vector function…

High Energy Physics - Phenomenology · Physics 2009-11-07 S. V. S. Sastry

I consider an exact model of atomic spontaneous dipole emission and classical dipole radiation in a finite photonic band-gap structure. The full 3D or 2D problem is reduced to a finite 1D model, and then this is solved for analytically…

Quantum Physics · Physics 2009-10-31 Jonathan P. Dowling

We derive an analytical form of the Schmidt modes of spontaneous parametric down-conversion (SPDC) biphotons in both Cartesian and polar coordinates. We show that these correspond to Hermite-Gauss (HG) or Laguerre-Gauss (LG) modes only for…

Quantum Physics · Physics 2012-08-02 Filippo M. Miatto , Thomas Brougham , Alison M. Yao

We show that exclusive production of a pair of high transverse momentum photons in pion-nucleon collisions can be systematically studied in QCD factorization approach if the photon's transverse momentum $q_T$ with respect to the colliding…

High Energy Physics - Phenomenology · Physics 2022-08-24 Jian-Wei Qiu , Zhite Yu

We compute the thermal photon spectrum in the Pb+Pb collisions at the CERN SPS energy using thermal emission rates and a hydrodynamic description for the evolution of produced hot matter and compare our results with the measurements of the…

Nuclear Theory · Physics 2009-11-07 P. Huovinen , P. V. Ruuskanen , S. S. Rasanen

The Landau-Pomeranchuk-Migdal effects on photon emission from the quark gluon plasma have been studied as a function of photon mass, at a fixed temperature of the plasma. The integral equations for the transverse vector function (${\bf…

High Energy Physics - Phenomenology · Physics 2008-11-26 S. V. Suryanarayana

We verify transverse spatial entanglement of photon-pairs generated in spontaneous parametric down conversion using a nonlinear interferometric technique without relying on any coincidence detection. We experimentally demonstrate the…

Semiconductor's energy band and its degeneracy are altered when an external magnetic field varies, analogously to the appearance of Landau levels. Such alternation leads to the variation of energy levels and thus quantum-mechanical…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 She-Sheng Xue

The interaction of an ensemble of atoms with common vacuum modes may lead to an enhanced emission into these modes. This phenomenon, known as superradiance, highlights the coherent nature of spontaneous emission, resulting in macroscopic…

We study the spontaneous emission of charged bosons from supercritical Coulomb potentials and charged black holes. We find the exact emission rate from the Bogoliubov transformation by applying the tunneling boundary condition on the Jost…

High Energy Physics - Theory · Physics 2015-06-18 Sang Pyo Kim

In this paper, we analyze spontaneous parametric down conversion in a 2D slant strip type periodically poled planar waveguide and show that such a configuration has efficiencies higher than in the case of bulk crystals with the possibility…

Quantum Physics · Physics 2017-01-04 Divya Bharadwaj , K. Thyagarajan

We report on the demonstration of correlated photon pair generation in quasi-phase-matched superlattice AlGaAs waveguides with a high coincidence-to-accidental ratio (CAR); with a continuous (CW) pump, the observed CAR (>100) is more than…

In this paper we study photon pairs generated in a nonlinear cavity, composed of a nonlinear crystal surrounded by mirrors, by the process of spontaneous parametric downconversion. We analyze two different regimes: singly-resonant cavities…

Quantum Physics · Physics 2010-06-02 Yasser Jeronimo-Moreno , Saul Rodriguez-Benavides , Alfred B. U'Ren