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Physica A Statistical Mechanics and its Applications

On the ground state of the two-dimensional non-ideal bose gas

Yu. E. Lozovik, Vladimir I. Yudson

Published Sep 1, 1978• 68 citations
Publisher
DOI
10.1016/0378-4371(78)90170-x

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The ideal Bose gas in a highly anisotropic harmonic potential is studied. It is found that Bose-Einstein condensation occurs in two distinct steps as the temperature is lowered. In the first step the specific heat shows a sharp feature, but the system still occupies many one-dimensional quantum states. In the second step, at a significantly lower temperature, the ground state becomes macroscopically occupied. It should be possible to verify these predictions using present-day atom traps. The two-step behavior can occur in a rather general class of anisotropic traps, including the box potential.