Inflationary Dynamics and Particle Production in a Toroidal Bose-Einstein Condensate
| Autor: | Anshuman Bhardwaj, Daniel E. Sheehy, Dzmitry Vaido |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Inflation (cosmology) Condensed Matter::Quantum Gases Toroid Condensed Matter::Other FOS: Physical sciences Context (language use) General Relativity and Quantum Cosmology (gr-qc) 16. Peace & justice 01 natural sciences General Relativity and Quantum Cosmology Redshift 010305 fluids & plasmas law.invention law Quantum Gases (cond-mat.quant-gas) Quantum electrodynamics 0103 physical sciences Coherent states Condensed Matter - Quantum Gases 010306 general physics Wave function Quantum Bose–Einstein condensate |
| DOI: | 10.48550/arxiv.2009.05611 |
| Popis: | We present a theoretical study of the dynamics of a Bose-Einstein condensate (BEC) trapped inside an expanding toroid that can realize an analogue inflationary universe. As the system expands, we find that phonons in the BEC undergo redshift and damping due to quantum pressure effects. We predict that rapidly expanding toroidal BEC's can exhibit spontaneous particle creation, and study this phenomenon in the context of an initial coherent state wavefunction. We show how particle creation would be revealed in the atom density and density correlations, and discuss connections to the cosmological theory of inflation. Comment: 13 pages, 6 figures |
| Databáze: | OpenAIRE |
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