Observation of an analogue to the Cosmic Hubble Friction in a Bose Einstein Condensate
ORAL
Abstract
We have simulated the cosmological Hubble friction using a toroidal Bose-Einstein condensate (BEC) of 23Na atoms. Where scalar fields in a BEC (such as phonons) have behavior analogous to cosmological scalar fields. We have observed both damping and growth of the phonon field when the toroidal BEC is expanded or contracted respectively. This is analogous to the damping or enhancement of cosmological fields due to Hubble friction. Furthermore, the measured strength of the Hubble friction is in agreement with recently published theory. In addition, we have also performed a systematic study of the Doppler shifts due to the phonon dynamics.
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Publication: In preparation.
Presenters
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Swarnav Banik
University of Maryland, College Park
Authors
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Swarnav Banik
University of Maryland, College Park
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Monica Galan
Joint Quantum Institute, University of Maryland College Park
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Hector Martinez
Joint Quantum Institute, University of Maryland College Park
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Madison J Anderson
University of Maryland, College Park, Joint Quantum Institute, University of Maryland College Park
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Stephen Eckel
NIST, Gaithersburg, MD
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Ian Spielman
University of Maryland, College Park
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Gretchen K Campbell
National Institute of Standards and Technology