Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Quantum 2.0 Conference and Exhibition

Squeezed states of waveguided sources with varying brightnesses are partially distinguishable

Martin Houde, Nicolás Quesada

Published Jan 1, 2022• 0 citations
Publisher

Abstract

Squeezed states generated by a parametric waveguided source driven by pumps with different brightness but identical profiles have partially mismatched temporal modes. Temporal-mode distinguishability can be removed at the expense of loss by frequency filtering.
DOI
10.1364/quantum.2022.qtu2a.28

Related papers

Waveguided sources of consistent, single-temporal-mode squeezed light: The good, the bad, and the ugly

Martin Houde, Nicolás Quesada

We study theoretically how the brightness of the pumps, with fixed profiles, affects the temporal mode structure of squeezed states generated by fixed parametric waveguided sources. We find that the temporal modes of these squeezed states can be partially mismatched and thus distinguishable, which is undesirable when using these states as resources for quantum computing or heralded state generation. By studying common frequency filtering techniques used experimentally, we find that although one can regain indistinguishability, it comes at the price of potentially greatly reducing the purity of the state. We consider three different source configurations: unapodized single pass, apodized single pass, and apodized double pass. We find that the double pass configuration produces optimal results with almost perfectly indistinguishable states over varying degrees of brightness.

arXiv:2209.13491•AVS Quantum Science•Feb 27, 2023•23 citations

Waveguided sources of consistent, single-temporal-mode squeezed light: the good, the bad, and the ugly

Martin Houde, Nicolás Quesada

We study how variations in pump brightness, for identical profiles, affect the temporal-mode structure of squeezed states generated by three different waveguided sources. Double-pass structures give optimal results in terms of indistinguishability and spectral purity.

•Jan 1, 2023•0 citations

Pairwise Mode-Locking of Coupled Parametric Oscillators

Leon Bello, Yaakov Shaked, Avi Pe’er

We present a source of broadband and bright, squeezed-light, using active coupling of two parametric oscillators. We demonstrate this design in a radio-frequency experiment, achieving pairwise mode-locking across the entire bandwidth between DC and the pump.

Quantum Information and Measurement (QIM)•Jan 1, 2017•1 citation

Decorrelated PDC source at telecom wavelengths with identical signal and idler

Georg Harder, Vahid Ansari, Benjamin Brecht +3 more

Parametric downconversion (PDC) in waveguides offers compact setups and high design flexibility in terms of the temporal-spectral properties of the generated photon pairs. It is thus a versatile source for a large number of quantum states with applications in quantum communication or quantum networks. One key element of those systems is the interference of quantum states from different, independent sources at e.g. beamsplitters with high visibility. Those sources should therefore not only meet demands of brightness and efficiency but also generate pure photons with identical properties, in particular in the frequency degree of freedom. In the context of PDC, such states are called decorrelated as there are no spatio-temporal correlations between signal and idler. They can be realized in bulk materials and waveguides by tailoring the pump and dispersion properties. The first source of this kind was demonstrated in bulk KDP at near-infrared wavelengths. For telecom wavelengths a bright, decorrelated source in a waveguide structure was realized in periodically poled KTP. However, in these sources the spectral properties of the signal and idler photons are still dissimilar.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•May 1, 2013•0 citations

Characterizing a Temporally Multimode Squeezed State using Frequency Resolved Optical Gating

Elina Sendonaris, Thomas Zacharias, Robert Gray +2 more

We numerically demonstrate that the squeezing parameters and temporal width of modes of a multimode squeezed state can be extracted using frequency resolved optical gating.

•Jan 1, 2025•0 citations

Spatial-temporal squeezed states of a field and phase conjugation of waves in optical parametric amplifiers and oscillators

Algis S. Piskarskas, A. Stabinis, A. Yankauskas

Optics and Spectroscopy•Apr 1, 1989•0 citations
We study theoretically how the brightness of the pumps, with fixed profiles, affects the temporal mode structure of squeezed states generated by fixed parametric waveguided sources. We find that the temporal modes of these squeezed states can be partially mismatched and thus distinguishable, which is undesirable when using these states as resources for quantum computing or heralded state generation. By studying common frequency filtering techniques used experimentally, we find that although one can regain indistinguishability, it comes at the price of potentially greatly reducing the purity of the state. We consider three different source configurations: unapodized single pass, apodized single pass, and apodized double pass. We find that the double pass configuration produces optimal results with almost perfectly indistinguishable states over varying degrees of brightness.
Parametric downconversion (PDC) in waveguides offers compact setups and high design flexibility in terms of the temporal-spectral properties of the generated photon pairs. It is thus a versatile source for a large number of quantum states with applications in quantum communication or quantum networks. One key element of those systems is the interference of quantum states from different, independent sources at e.g. beamsplitters with high visibility. Those sources should therefore not only meet demands of brightness and efficiency but also generate pure photons with identical properties, in particular in the frequency degree of freedom. In the context of PDC, such states are called decorrelated as there are no spatio-temporal correlations between signal and idler. They can be realized in bulk materials and waveguides by tailoring the pump and dispersion properties. The first source of this kind was demonstrated in bulk KDP at near-infrared wavelengths. For telecom wavelengths a bright, decorrelated source in a waveguide structure was realized in periodically poled KTP. However, in these sources the spectral properties of the signal and idler photons are still dissimilar.