Coherence measurements of polaritons in thermal equilibrium reveal a power law for two-dimensional condensates
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arXiv
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866911247645016064 |
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| author | Alnatah, Hassan Yao, Qi Beaumariage, Jonathan Mukherjee, Shouvik Tam, Man Chun Wasilewski, Zbigniew West, Ken Baldwin, Kirk Pfeiffer, Loren N. Snoke, David W. |
| author_facet | Alnatah, Hassan Yao, Qi Beaumariage, Jonathan Mukherjee, Shouvik Tam, Man Chun Wasilewski, Zbigniew West, Ken Baldwin, Kirk Pfeiffer, Loren N. Snoke, David W. |
| contents | We have created a spatially homogeneous polariton condensate in thermal equilibrium, up to very high condensate fraction. Under these conditions, we have measured the coherence as a function of momentum, and determined the total coherent fraction of this boson system from very low density up to density well above the condensation transition. These measurements reveal a consistent power law for the coherent fraction as a function of the total density 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. This power law has not been predicted by prior analytical theories. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_05100 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Coherence measurements of polaritons in thermal equilibrium reveal a power law for two-dimensional condensates Alnatah, Hassan Yao, Qi Beaumariage, Jonathan Mukherjee, Shouvik Tam, Man Chun Wasilewski, Zbigniew West, Ken Baldwin, Kirk Pfeiffer, Loren N. Snoke, David W. Quantum Gases We have created a spatially homogeneous polariton condensate in thermal equilibrium, up to very high condensate fraction. Under these conditions, we have measured the coherence as a function of momentum, and determined the total coherent fraction of this boson system from very low density up to density well above the condensation transition. These measurements reveal a consistent power law for the coherent fraction as a function of the total density 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. This power law has not been predicted by prior analytical theories. |
| title | Coherence measurements of polaritons in thermal equilibrium reveal a power law for two-dimensional condensates |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2308.05100 |