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Bose condensation in strongly monideal systems

✍ Scribed by V.I. Yukalov

Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
562 KB
Volume
100
Category
Article
ISSN
0378-4371

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✦ Synopsis

The possibility of the formation of a condensate with a finite absolute value of the momentum k0 in a strongly nonideal Bose system is considered. Such a condensate comes into existence when the one-particle spectrum of a normal system touches zero in the point ko # 0. The form of a correlation function below the condensation point shows the appearance of a long-range order, but not the infinite long-range one. In the case of liquid 'He estimates show that k0 6 1 A-', and at the temperature To -1 K this unusual condensate with a finite magnitude of the momentum turns into the conventional Bose-Einstein condensate with the zero momentum. The properties of correlation functions in the spaces of different dimensions are discussed.

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