SC12 Home > SC12 Schedule > SC12 Presentation - Simulating Forced Evaporative Cooling Utilising a Parallel Direct Simulation Monte Carlo Algorithm

SCHEDULE: NOV 10-16, 2012

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Simulating Forced Evaporative Cooling Utilising a Parallel Direct Simulation Monte Carlo Algorithm

SESSION: Doctoral Showcase - Early Research Showcase

EVENT TYPE: Doctoral Showcase

TIME: 3:30PM - 5:00PM

SESSION CHAIR: Wojtek James Goscinski

Presenter(s):Christopher Jon Watkins

ROOM:155-F

ABSTRACT:
Atomic spins moving in position-dependent magnetic fields are at the heart of many ultracold atomic physics experiments. A mechanism known as a Majorana spin flip, causes loss from these magnetic traps. Though often avoided by various means, they play a larger role in a new form of hybrid trap - comprising a magnetic quadrupole superposed on an optical dipole potential. Previously, the spin-flip mechanism was modelled with a finite sized hole from which atoms are expelled from the trap. Instead, we numerically model the coupled spin and motional dynamics of an ensemble of atoms in a magnetic quadrupole field. Directly tracking the spin dynamics provides insight into the spin-flip mechanism and its effect on the velocity distribution of atoms remaining in the trap. The high computational demand of this simulation has prompted the parallelisation on Graphics Processing Units using NVIDIAs Compute Unified Device Architecture.

Chair/Presenter Details:

Wojtek James Goscinski (Chair) - Monash University

Christopher Jon Watkins - Monash University

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