Friday, May 24, 2013

1305.5314 (Bogdan Opanchuk et al.)

Quantum simulations of the early universe    [PDF]

Bogdan Opanchuk, Rodney Polkinghorne, Oleksandr Fialko, Joachim Brand, Peter D. Drummond
We describe a procedure whereby a linearly coupled spinor Bose condensate can be used as a physically accessible quantum simulator of the early universe. In particular, we show how to generate a model of an unstable vacuum in a relativistic scalar field theory, which is related to the early models of inflation. There is an unstable vacuum sector whose dynamics correspond to the quantum sine-Gordon equations in one, two or three space dimensions. We give numerical simulations of the expected behavior using a truncated Wigner phase-space method, showing evidence for the dynamical formation of complex spatial clusters. The dependence on coupling strength, condensate size and dimensionality is investigated.
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