Related Experiment Video
Updated: Mar 13, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Scaling of thermal hysteretic behavior in a parametrically modulated cold atomic system
Wanhee Lee1, Ji-Hyoun Kim1, Jong Geun Hwang1
1Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea.
Abstract:
We observe the hysteresis of a spontaneous symmetry breaking (SSB) transition in a parametrically modulated magneto-optical trap by sweeping the total number of atoms and study thermal hysteretic behavior in the system by measuring the scaling exponent of hysteresis. It is shown that the relaxation time of the order parameter in the SSB transition becomes larger near the critical number. The scaling exponent of the hysteresis area with number sweeping rate is found to be 0.64±0.04, which is consistent with the value in the mean-field model.
More Related Videos
11:11Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
Published on: May 2, 2016
08:55Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Related Concept Videos
Atomic Spectroscopy: Effects of Temperature
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
Temperature Dependent Deformation
Le Chatelier's Principle: Changing Temperature
To understand this phenomenon, consider the elementary reaction:
Atomic Nuclei: Nuclear Spin State Population Distribution
Thermal expansion and Thermal stress: Problem Solving
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55...
Atomic Nuclei: Nuclear Relaxation Processes