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COLLECTIVE EXCITATIONS IN THE 2D PLANAR PHASE OF SUPERFLUID HELIUM 3.

[In Russian. / En russe.]

Author(s) : BRUSOV P. N., LOMAKOV M. V.

Type of article: Article

Summary

FOR THE FIRST TIME THE COMPLETE SPECTRUM OF COLLECTIVE EXCITATIONS IN THE 2D PLANAR PHASE OF SUPERFLUID HELIUM 3 IS CALCULATED. IN ORDER TO CALCULATE THE SPECTRUM, THE PATH INTEGRATION METHOD DEVELOPED BY BRUSOV AND POPOV IS USED. THE SPECTRUM CONTAINS THE MODES KNOWN BEFORE FROM THE A-PHASE SPECTRUM (IE GOLDSTONE, CLAPPING AND PAIR-BREAKING), AS WELL AS THE NEW MODES EXISTING ONLY IN THE 2D PHASE. NOTEWORTHY IS THAT THE FREQUENCES OF CLAPPING AND PAIR-BREAKING MODES EXHIBITING THE LINEAR ZEEMAN EFFECT IN THE A-PHASE ARE INDEPENDENT OF MAGNETIC FIELD IN THE 2D PHASE. THE COLLECTIVE MODE ENERGIES ARE COMPLEX, WHAT IS ASSOCIATED WITH A VANISHING OF THE GAP IN THE SINGLE-PARTICLE SPECTRUM ALONG THE FIXED DIRECTION, ON THE ANALOGY TO THE CASE OF THE A-PHASE.

Details

  • Original title: [In Russian. / En russe.]
  • Record ID : 1992-0929
  • Languages: Russian
  • Source: Z. eksp. teor. Fiz. - vol. 100 - n. 3
  • Publication date: 1991/09
  • Document available for consultation in the library of the IIR headquarters only.

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