2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Stable longitudinal spin domains in a nondegenerate ultracold gas

5 Jun 2019, 12:00
15m
BLU 10011 (Simon Fraser University)

BLU 10011

Simon Fraser University

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle) Division of Atomic, Molecular and Optical Physics, Canada / Division de la physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC) W1-1 Degenerate Quantum Gases and Cold Atoms and Molecules (DAMOPC/DCMMP) | Gaz quantiques dégénérés, molécules et atomes froids (DPAMCP/DPMCM)

Speaker

Sean Graham (Simon Fraser University)

Description

We demonstrate that linear effective magnetic fields can stabilize longitudinal spin domains in a weakly-interacting gas of $^{87}$Rb atoms above quantum degeneracy. Coherent spin-rotating interactions are modified by applying a small linear effective magnetic field that varies the local Larmor precession. Adding small linear effective magnetic fields with gradients that oppose the initial spin gradient in the domain wall stabilizes the spin domains. We experimentally determine these stabilizing gradients over a range of cloud temperatures and densities, and compare to a quantum Boltzmann theory in the hydrodynamic regime.

Primary author

Sean Graham (Simon Fraser University)

Co-authors

Dorna Niroomand (Simon Fraser University) Robert J. Ragan (University of Wisconsin - La Crosse) Jeffrey McGuirk (Simon Fraser University)

Presentation Materials