Franz Wegner 2006 J. Phys. A: Math. Gen. 39 8221 doi:10.1088/0305-4470/39/25/S29
Franz Wegner
Show affiliationsFirst we give an introduction to the method of diagonalizing or block-diagonalizing continuously a Hamiltonian and explain how this procedure can be used to analyse the two-dimensional Hubbard model. Then we give a short survey on applications of this flow equation on other models. Finally we outline, how symmetry breaking can be introduced by means of a symmetry breaking of the normal ordering, not of the Hamiltonian.
05.30.Fk Fermion systems and electron gas
03.65.Yz Decoherence; open systems; quantum statistical methods
Quantum gases, liquids and solids
Issue 25 (23 June 2006)
Received 30 November 2005, in final form 8 February 2006
Published 7 June 2006
Franz Wegner 2006 J. Phys. A: Math. Gen. 39 8221
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