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SUMMARY:Flow equations for Hamiltonians - Wegner\, F (Heidelberg)
DTSTART:20080826T130000Z
DTEND:20080826T140000Z
UID:TALK13230@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:This is a method to diagonalize or block-diagonalize a Hamilto
 nian by a\ncontinuous unitary transformation.\n\nAfter an introduction int
 o the method a short survey of applications are\ngiven.\nAs an example the
  elimination of the electron-phonon interaction in\nsecond order in the co
 upling is performed.\nThen a gradient-procedure which minimizes a cost-fun
 ction is shown.\nA procedure to bring the Hubbard Hamiltonian to molecular
 -field form is\ngiven as a second example.\n\nOriginal paper:\nFW\, Annale
 n der Physik (Leipzig) 3 (1994) 77\n
LOCATION:Seminar Room 1\, Newton Institute
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