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

arXiv:0810.0932 · Physical Review A

Multiparameter entangled-state engineering using adaptive optics

Cristian Bonato, David S. Simon, Paolo Villoresi, Alexander V. Sergienko

Published Jun 5, 2009• 15 citations
arXivHTMLPDF

Abstract

We investigate how quantum coincidence interferometry is affected by a controllable manipulation of transverse wave vectors in type-II parametric down-conversion using adaptive optics techniques. In particular, we discuss the possibility of spatial walk-off compensation in quantum interferometry and an effect of even-order spatial aberration cancellation.

DOI
10.1103/physreva.79.062304

Related papers

Engineering Multiparameter Entangled State With Adaptive Optics

Alexander V. Sergienko, Cristian Bonato, Stefano Bonora +1 more

We discuss the possibility of actively manipulating parameters of entangled states generated by type-II parametric down conversion. We study the effect our active manipulation of wavevector distribution using adaptive mirror will have on the behavior of polarization-temporal interference. The use of an actively engineered spatial entanglement allows us to maintain a high-visibility interference despite the negative effect of spatial walk off.

International Conference on Quantum Information•Jan 1, 2008•0 citations

Generation, characterization and applications of optical entangled states

Christian Bonato

This work concerns the generation of optical entangled states by means of parametric down-conversion and their applications in the fields of quantum metrology and quantum information. Particularly we studied the manipulation of multiparameter entanglement by means of adaptive optics, demonstrating a way to improve entanglement visibility with type-II downconversion in the case of large detection apertures and a spatial counterpart to quantum dispersion-cancellation. Moreover, we worked on satellite quantum information, demonstrating the feasibility of single photon exchange between a LEO satellite and a ground station.

•Jan 1, 2008•0 citations

Even-Order Aberration Cancellation in Quantum Interferometry

Cristian Bonato, Alexander V. Sergienko, Bahaa E. A. Saleh +2 more

We report the first experimental demonstration of even-order aberration cancellation in quantum interferometry. The effect is a spatial counterpart of the spectral group velocity dispersion cancellation, which is associated with spectral entanglement. It is manifested in temporal interferometry by virtue of the multiparameter spatial-spectral entanglement. Spatially entangled photons, generated by spontaneous parametric down-conversion, were subjected to spatial aberrations introduced by a deformable mirror that modulates the wave front. We show that only odd-order spatial aberrations affect the quality of quantum interference.

arXiv:0807.2909•Physical Review Letters•Dec 2, 2008•45 citations

Spatial-dispersion cancellation in quantum interferometry

David S. Simon, Alexander V. Sergienko

We investigate cancellation of spatial aberrations induced by an object placed in a quantum coincidence interferometer with type-II parametric down conversion as a light source. We analyze in detail the physical mechanism by which the cancellation occurs and show that the aberration cancels only when the object resides in one particular plane within the apparatus. In addition, we show that for a special case of the apparatus it is possible to produce simultaneous cancellation of both even-order and odd-order aberrations in this plane.

arXiv:0911.0251•Physical Review A•Nov 10, 2009•15 citations

Multiparameter entanglement in quantum interferometry

Mete Atatüre, Giovanni Di Giuseppe, Matthew D. Shaw +3 more

The role of multiparameter entanglement in quantum interference from collinear Type-II spontaneous parametric down-conversion is explored using a variety of aperture shapes and sizes, in regimes of both ultrafast and continuous-wave pumping. We have developed and experimentally verified a theory of down-conversion which considers a quantum state that can be concurrently entangled in frequency, wavevector, and polarization. In particular, we demonstrate deviations from the familiar triangular interference dip, such as asymmetry and peaking. These findings improve our capacity to control the quantum state produced by spontaneous parametric down-conversion, and should prove useful to those pursuing the many proposed applications of down-converted light.

arXiv:quant-ph/0111024•Physical Review A•Aug 30, 2002•43 citations

Dispersion Cancellation and Manipulation in Quantum Interferometry

Alexander V. Sergienko, Olga V. Minaeva, Cristian Bonato +1 more

We demonstrate simultaneous even- and odd-order spectral dispersion cancellation in a single experiment. We also present a spatial counterpart of the dispersion cancellation effect that leads to the removal of even-order aberrations in quantum interference.

Frontiers in Optics•Jan 1, 2008•0 citations
We investigate how quantum coincidence interferometry is affected by a controllable manipulation of transverse wave vectors in type-II parametric down-conversion using adaptive optics techniques. In particular, we discuss the possibility of spatial walk-off compensation in quantum interferometry and an effect of even-order spatial aberration cancellation.
This work concerns the generation of optical entangled states by means of parametric down-conversion and their applications in the fields of quantum metrology and quantum information. Particularly we studied the manipulation of multiparameter entanglement by means of adaptive optics, demonstrating a way to improve entanglement visibility with type-II downconversion in the case of large detection apertures and a spatial counterpart to quantum dispersion-cancellation. Moreover, we worked on satellite quantum information, demonstrating the feasibility of single photon exchange between a LEO satellite and a ground station.
We report the first experimental demonstration of even-order aberration cancellation in quantum interferometry. The effect is a spatial counterpart of the spectral group velocity dispersion cancellation, which is associated with spectral entanglement. It is manifested in temporal interferometry by virtue of the multiparameter spatial-spectral entanglement. Spatially entangled photons, generated by spontaneous parametric down-conversion, were subjected to spatial aberrations introduced by a deformable mirror that modulates the wave front. We show that only odd-order spatial aberrations affect the quality of quantum interference.
We investigate cancellation of spatial aberrations induced by an object placed in a quantum coincidence interferometer with type-II parametric down conversion as a light source. We analyze in detail the physical mechanism by which the cancellation occurs and show that the aberration cancels only when the object resides in one particular plane within the apparatus. In addition, we show that for a special case of the apparatus it is possible to produce simultaneous cancellation of both even-order and odd-order aberrations in this plane.
The role of multiparameter entanglement in quantum interference from collinear Type-II spontaneous parametric down-conversion is explored using a variety of aperture shapes and sizes, in regimes of both ultrafast and continuous-wave pumping. We have developed and experimentally verified a theory of down-conversion which considers a quantum state that can be concurrently entangled in frequency, wavevector, and polarization. In particular, we demonstrate deviations from the familiar triangular interference dip, such as asymmetry and peaking. These findings improve our capacity to control the quantum state produced by spontaneous parametric down-conversion, and should prove useful to those pursuing the many proposed applications of down-converted light.