Results 41 to 50 of about 3,503,750 (176)

Nonperturbative theory of spontaneous parametric down-conversion in open and dispersive optical systems

open access: yesPhysical Review Research, 2023
We develop a nonperturbative formulation based on the Green's function quantization method that can describe spontaneous parametric down-conversion in the high-gain regime in nonlinear optical structures with arbitrary amount of loss and dispersion. This
Aleksa Krstić   +2 more
doaj   +1 more source

Mie resonances in the spectrum of spontaneous parametric down-conversion

open access: yes, 2022
Paper FTh1O.5We report on the first-time generation of biphotons via spontaneous parametric down-conversion driven by Mie-type resonances in subwavelength metasurfaces.
Younesi, M.   +8 more
core   +1 more source

Multi-qubit production in spontaneous parametric down conversion [PDF]

open access: yesFrontiers in Optics + Laser Science 2021, 2021
We present a novel yet simple approach to produce multiple entangled photon pairs through spontaneous parametric down conversion (SPDC). We have designed Gaussian masks to subdivide the pump beam before passing it through a nonlinear medium. In this way, we are able to observe simultaneous separate down converted emission cones with spatial overlap ...
Heitert, Phillip   +3 more
openaire   +2 more sources

Understanding High-Gain Twin-Beam Sources Using Cascaded Stimulated Emission

open access: yesPhysical Review X, 2020
We present a new method for the spectral characterization of pulsed twin-beam sources in the high-gain regime, using cascaded stimulated emission. We show an implementation of this method for a periodically poled potassium titanyl phosphate spontaneous ...
Gil Triginer   +7 more
doaj   +1 more source

Interaction‐Free Quantum Spectroscopy

open access: yesAdvanced Photonics Research, 2021
Interaction‐free measurement (IFM)‐based single‐photon interference is developed as a powerful platform for revealing object information in quantum metrology, where the presence of a sample is identified without photon “touching” in an interferometer ...
Yu Chen   +5 more
doaj   +1 more source

Imaging high-dimensional spatial entanglement with a camera [PDF]

open access: yes, 2012
The light produced by parametric down-conversion shows strong spatial entanglement that leads to violations of EPR criteria for separability. Historically, such studies have been performed by scanning a single-element, single-photon detector across a ...
Leach, J.   +17 more
core   +1 more source

Telecom quantum photonic interface for a 40Ca+ single-ion quantum memory

open access: yesnpj Quantum Information, 2023
Entanglement-based quantum networks require quantum photonic interfaces between stationary quantum memories and photons, enabling entanglement distribution.
Elena Arenskötter   +5 more
doaj   +1 more source

On the geometry of spatial biphoton correlation in spontaneous parametric down conversion [PDF]

open access: yesMathematical Methods in the Applied Sciences, 2014
Analytical expressions are derived for the distribution rates of spatial coincidences in the counting of photons produced by spontaneous parametric down conversion. Gaussian profiles are assumed for the wave function of the idler and signal light created in type‐I spontaneous parametric down conversion.
Procopio, L. M.   +2 more
openaire   +3 more sources

Polarization Sensitive Imaging with Qubits

open access: yesApplied Sciences, 2022
We compare reconstructed quantum state images of a birefringent sample using direct quantum state tomography and inverse numerical optimization technique.
Vitaly Sukharenko, Roger Dorsinville
doaj   +1 more source

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