Speaker
Description
We report recent progress on the measurement of the coherent fraction of a two-dimensional Bose gas in thermal equilibrium. We have created a homogeneous exciton-polariton gas in equilibrium, realizing the textbook paradigm of a uniform Bose Gas in two-dimensions. Under these conditions, we have measured the coherent fraction of this Bose gas from very low density up to density well above the condensation threshold. These measurements reveal a consistent power law for the coherent fraction over nearly three orders of its magnitude. The same power law is seen in numerical simulations solving the two-dimensional Gross-Pitaevskii equation for the equilibrium coherence; these simulations also show that the power law corresponds to the coherence length in the system growing with a power law of 1.6 as a function of the total density. This power law has not been predicted by prior analytical theories.
This work has been supported by the National Science Foundation through Grant DMR-2306977.
Relevant publications (optional)
https://arxiv.org/abs/2308.05100
https://www.science.org/doi/full/10.1126/sciadv.adi6762
Short bio (50 words) or link to website
I am a fifth-year graduate student working with Dr. David Snoke at the University of Pittsburgh.
| Career stage | Student |
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