Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session N08: Long-Range or Anisotropic Interactions
8:00 AM–10:00 AM,
Thursday, June 6, 2024
Room: 203B
Chair: W. Vincent Liu, University of Pittsburgh
Abstract: N08.00010 : From conditional phase to quantum vortices of photons*
9:48 AM–10:00 AM
Presenter:
Bankim Chandra Das
(Weizmann Institute of Science)
Authors:
Bankim Chandra Das
(Weizmann Institute of Science)
Lee Drori
(Weizmann Institute of Science)
Tomer D ZOHAR
(Weizmann Institute of Science)
Gal Winer
(Weizmann institute of Science)
Eilon Poem
(Weizmann Institute of Science)
Alexander N Poddubny
(Weizmann institute of Science)
Ofer Firstenberg
(Weizmann Institute of Science)
We report on the realization of quantum vortices of photons that result from a strong photon-photon interaction in a quantum nonlinear optical medium. The interaction causes faster phase accumulation for co-propagating photons, producing a quantum vortex-antivortex pair within the two-photon wave function.
For counter-propagating photons, a conditional phase and a non-trivial intensity correlation between the photons are also observed. Furthermore, if the photons have different parity, they exchange their parity by the long-range dipole-dipole exchange interaction by imprinting a pi/2 conditional phase.
For three photons, the strong interaction leads to an even richer topological structure of the three-photon wavefunction. The point vortices lead to the formation of vortex lines, and a central vortex ring attests to a genuine three-photon interaction. It also produces chiral asymmetric interactions between the photons.
The wavefunction topology, governed by two- and three-photon bound states, imposes a conditional phase shift of pi-per-photon, a potential resource for deterministic quantum logic operations.
*We acknowledge financial support from the Israel Science Foundation, the US-Israel Binational Science Foundation (BSF) and US National Science Foundation (NSF), the European Research Council starting investigator grant QPHOTONICS 678674, the Minerva Foundation with funding from the Federal German Ministry for Education and Research, the Estate of Louise Yasgour, and the Laboratory in Memory of Leon and Blacky Broder
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