Idealized Einstein-Podolsky-Rosen states from non-phase-matched parametric down-conversion

Okoth C, Kovlakov E, Boensel F, Cavanna A, Straupe S, Kulik SP, Chekhova M (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Physical Review A American Physical Society

Book Volume: 101

Journal Issue: 1

DOI: 10.1103/PhysRevA.101.011801

Abstract

The most common source of entangled photons is spontaneous parametric down-conversion (SPDC). The degree of energy and momentum entanglement in SPDC is determined by the nonlinear interaction volume. By reducing the length of a highly nonlinear material, we relax the longitudinal phase-matching condition and reach record levels of transverse momentum entanglement. The degree of entanglement is estimated using both correlation measurements and stimulated emission tomography in wave-vector space. The high entanglement of the state in wave-vector space can be used to massively increase the quantum information capacity of photons, but more interestingly the equivalent state measured in position space is correlated over distances far less than the photon wavelength. This property promises to improve the resolution of many quantum imaging techniques beyond the current state of the art.

Authors with CRIS profile

Cameron Okoth Lehrstuhl für Experimentalphysik (Optik) Maria Chekhova Lehrstuhl für Experimentalphysik (Optik)

Involved external institutions

Lomonosov Moscow State University / Московский государственный университет имени М.В.Ломоносова RU Russian Federation (RU) Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

Okoth, C., Kovlakov, E., Boensel, F., Cavanna, A., Straupe, S., Kulik, S.P., & Chekhova, M. (2020). Idealized Einstein-Podolsky-Rosen states from non-phase-matched parametric down-conversion. Physical Review A, 101(1). https://doi.org/10.1103/PhysRevA.101.011801

MLA:

Okoth, Cameron, et al. "Idealized Einstein-Podolsky-Rosen states from non-phase-matched parametric down-conversion." Physical Review A 101.1 (2020).

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