Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session M09: Spinor Gases and Magnetic Phenomena
2:00 PM–4:00 PM,
Wednesday, June 2, 2021
Chair: Donald P. Fahey, US Army Research Lab
Abstract: M09.00009 : Investigating thermally robust spin entanglement of an atomic 85Rb pair in an optical tweezer*
3:36 PM–3:48 PM
Live
Presenter:
Lucile Sanchez
(Department of Physics, University of Otago, New Zealand)
Authors:
Lucile Sanchez
(Department of Physics, University of Otago, New Zealand)
Poramaporn Ruksasakchai
(The Dodd-Walls Centre for Photonic and Quantum Technologies, Department of Physics, University of Otago, Dunedin, New Zealand)
Marvin Weyland
(The Dodd-Walls Centre for Photonic and Quantum Technologies, Department of Physics, University of Otago, Dunedin, New Zealand)
Pimonpan Sompet
(Max Planck Institute for Quantum Optics)
Stuart Szigeti
(Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Canberra, ACT, 2601, Australia)
Eyal Schwartz
(University of Mississippi)
Ashton Bradley
(Department of Physics, University of Otago)
Mikkel F Andersen
(Univ of Otago)
We study hot spin-changing collision as a route to entanglement and the parameters playing a role on the coherence of the prepared state. We observe the population dynamics of the magnetic sublevels of a atomic pair of 85Rb undergoing a collision in an optical tweezer. The spin-changing collision of two thermal atoms initially prepared in m=0 in two microtraps leads to strong spin pair correlations between the states m=1 and m=-1. To distinguish between classical correlations or entanglement, we apply a Raman transition pulse coupling the two magnetic sublevels to probe the resulting pair spin state. The spin interaction during the 2-body collision depends on experimental parameters such as the depth of the trap, the bias magnetic field and the duration of the exchange. In the present investigation, we explore the role of those parameters and find the right tuning to leave the atom pair entangled by the spin-exchange collision.
*Marsden Fund Council from Government funding, administered by the Royal Society of New Zealand (Contract No. UOO1835 & No. UOO1320) and the Dodd-Walls Centre for Photonic and Quantum Technologies.
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