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Coleman-Weinberg mechanism in spinor Bose-Einstein condensates

Published in Europhysics Letters. 2014, vol. 107, no. 3, p. 30004
Abstract It is argued that a continuous quantum phase transition between different ordered phases in spinor Bose-Einstein condensates predicted by the mean-field theory is vulnerable to quantum fluctuations. By analyzing Lee-Huang-Yang corrections in the condensate, we demonstrate that the so-called Coleman-Weinberg mechanism takes place in such a transition, that is, the transition becomes of the first order by quantum fluctuations. A jump to be expected in this first-order transition is induced by a correction from density fluctuations despite a transition between different magnetic properties with keeping condensation. We exemplify this with an experimentally relevant case and show that a measurement of a condensate depletion can be utilized to confirm the first-order transition.
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Research group Groupe Giamarchi
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UCHINO, Shun. Coleman-Weinberg mechanism in spinor Bose-Einstein condensates. In: Europhysics Letters, 2014, vol. 107, n° 3, p. 30004. https://archive-ouverte.unige.ch/unige:39311

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Deposited on : 2014-08-11

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