Bulletin of the American Physical Society
53rd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 67, Number 7
Monday–Friday, May 30–June 3 2022; Orlando, Florida
Session K08: Nonlinear Optics and Spin Squeezing
10:30 AM–12:30 PM,
Wednesday, June 1, 2022
Room: Salon 7/8
Chair: Jonathan Wrubel, Creighton University
Abstract: K08.00002 : Two-mode squeezing in cold atomic ensembles*
10:42 AM–10:54 AM
Presenter:
Arina Tashchilina
(University of Alberta)
Authors:
Arina Tashchilina
(University of Alberta)
Barry C Sanders
(University of Science and Technology of China)
Evgeny Moiseev
(Kazan Quantum Center, Kazan National Research Technical University, Russia)
Alexander Lvovsky
(University of Calgary)
Sergey Moiseev
(Kazan Quantum Center, Kazan National Research Technical University, Russia)
Xianxin Guo
(Department of Physics, University of Oxford, Oxford OX1 3PU, UK)
In the first part of work I will overview our theoretical proposal for generation of two-mode squeezed vacuum (TMSV) through dissipation. The two signal modes interacting with the ground-state atomic coherence interfere destructively, creating TMSV with a particular squeezing parameter. The squeezing is defined by the parameters of the medium. Once the TMSV is created it stops evolving while it propagates through the lossy atomic medium.
The second part combines theoretical and experimental research. Making use of cavity-enhanced double-Λ four-wave mixing, we report –3.6 dB of squeezing (after correcting for losses), which is a record for a cold atomic ensemble. Theoretically the system is analyzed in the Heisenberg-Langevin picture. This enables us to build an intuitive and qualitative description of the experiment. Based on agreement between our experimental and theoretical results we propose routes to further increase the squeezing strength.
*This work was supported by NSERC and CIFAR.Authors appreciate support within framework project # 00075-02-2020-051/1
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