Statistical Physics and Condensed Matter

Flow Equations for Hamiltonians

Papers from the Institute for Theoretical Physics at the University Heidelberg

(in chronological order)

  1. F. Wegner:
    Flow equations for Hamiltonians.
    Ann. Physik, Leipzig 3, 77 (1994)
    Abstract
  2. S.K. Kehrein, A. Mielke:
    Flow equations for the Anderson Hamiltonian.
    cond-mat/9405034,
    J. Phys. A - Math. Gen. 27, 4259-4279 (1994); corrigendum 27, 5705 (1994)
    Abstract
  3. S.K. Kehrein, A. Mielke, and P. Neu:
    Flow equations for the spin-boson problem.
    Z. Phys. B 99, 269 (1996)
    Abstract
  4. S.K. Kehrein, A. Mielke:
    Theory of the Anderson impurity model: The Schrieffer-Wolff transformation re-examined.
    cond-mat/9510145,
    Ann. Phys. (NY) 252, 1 (1996)
    Abstract
  5. S.K. Kehrein, A. Mielke:
    On the spin-boson model with a sub-Ohmic bath.
    cond-mat/9602029,
    Phys. Lett. A 219, 313 (1996).
    Abstract
  6. P. Lenz, F. Wegner:
    Flow equations for electron-phonon interactions.
    cond-mat/9604087,
    Nucl. Phys. B482 [FS] (1996) 693-712
    Abstract
  7. S.K. Kehrein, A. Mielke:
    Low temperature equilibrium correlation functions in dissipative quantum systems.
    Ann. Physik (Leipzig) 6, 90 (1997)
    Abstract
  8. A. Mielke:
    Similarity renormalization of the electron-phonon coupling.
    Preprint HD-TVP-96-9, cond-mat/9609065
    Ann. Physik (Leipzig) 6, 215-233 (1997)
    Abstract
  9. S.K. Kehrein, A. Mielke:
    Diagonalization of system plus environment Hamiltonians.
    J. Stat. Phys. 90, 889-898 (1998), cond-mat/9701123
    Abstract
  10. J. Stein:
    Flow equations and the strong-coupling expansion for the Hubbard model.
    J. Stat. Phys. 88 (1997) 487 (Postscript-File)
    Abstract
  11. A. Mielke:
    Calculating critical temperatures of superconductivity from a renormalized Hamiltonian.
    Europhys. Lett. 40, 195-200 (1997) Abstract
  12. A. Kabel, F. Wegner:
    Flow Equations for Hamiltonians: Crossover from Luttinger to Landau-Liquid Behaviour in the n-Orbital Model.
    Z. Phys. B 103 (1997) 555
    Abstract
  13. F. Wegner:
    Flow Equations for Hamiltonians.
    Proceedings of the Bar-Ilan 1997 Minerva Workshop on Mesoscopics, Fractals, and Neural Networks, Eilat
    Phil. Mag. B 77 (1998) 1249
    Abstract
  14. F. Wegner:
    Hamiltonian Flow in Condensed Matter Physics.
    in M. Grangé et al (eds.), New Non-Perturbative Methods and Quantization on the Light Cone, Les Houches School 1997, Editions de Physique/Springer Vol. 8 (1998) 33
    Abstract
  15. E.L. Gubankova, F. Wegner:
    Flow equations for QED in the light front dynamics
    Phys. Rev. D 58 (1998) 025012
    hep-th/9710233
    Abstract
  16. A. Mielke:
    Flow equations for band-matrices.
    preprint HD-TVP-98-01, quant-ph/9803040
    Eur. Phys. J. B 5, 605-611 (1998)
    Abstract
  17. J. Stein:
    Flow equations and extended Bogoliubov transformation for the Heisenberg antiferromagnet near the classical limit.
    Eur. Phys. J. B 5 (1998) 193 (Postscript-File)
    Abstract
  18. M. Ragwitz and F. Wegner:
    Flow Equations for Electron-Phonon Interactions: Phonon Damping.
    Eur. Phys. J. B 8 (1999) 9
    Abstract
  19. D. Cremers and A. Mielke:
    Flow equations for the Henon-Heiles Hamiltonian.
    preprint HD-TVP-98-04, quant-ph/9809086
    Physica D 126, 123-135 (1999)
    Abstract
  20. E.L. Gubankova, H.C. Pauli, F.J. Wegner:
    Light-cone Hamiltonian flow for positronium, preprint MPI-H-V33-1998.
    Abstract
  21. H. J. Pirner, B. Friman:
    Hamiltonian Flow Equations for the Lipkin model.
    Phys. Lett. B434, 231 (1998), nucl-th/9804039
    Abstract
  22. A. B. Bylev, H. J. Pirner:
    Hamiltonian Flow Equations for a Dirac Particle in an external Potential
    Phys. Lett. B428, 329 (1998), hep-th/9712203
    Abstract
  23. J. Stein:
    Flow equations and the Ruderman-Kittel-Kasuya-Yosida interaction.
    Eur. Phys. J. B 12 (1999) 5 (Postscript-File)
    Abstract
  24. J. Stein:
    Flow equations and new weak-coupling solution for the spin-polaron in a quantum antiferromagnet.
    Europhys. Lett. 50 (2000) 68 (Postscript-File)
    Abstract
  25. J. Stein:
    Unitary flow of the bosonized large-N Lipkin model.
    J. Phys. G 26 (2000) 377 (Postscript-File)
    Abstract
  26. F. Wegner:
    Flow Equations for Hamiltonians.
    Renormalization Group Theory in the new Millenium. II (Proceedings of the RG 2000 in Taxco, Mexico) Physics Reports 348 (2001) 77
    Abstract
  27. F. Wegner:
    Flow Equations for Hamiltonians.
    in H.C. Pauli and L.C.L. Hollenberg (eds.), Non-Perturbative QCD and Hadron Phenomenology, Nucl. Phys. B (Proc. Suppl.) 90 (2000) 141
    Abstract
  28. F. Wegner:
    Flow Equations for Hamiltonians.
    in B. Kramer (ed.), Advances in Solid State Physics 40 (2000) 113
    Abstract
  29. A. Mielke:
    Diagonalization of Dissipative Quantum Systems I: Exact Solution of the Spin-Boson Model with an Ohmic bath at alpha=1/2.
    preprint (2000).
    Abstract
  30. I. Grote, E. Körding, F. Wegner:
    Stability Analysis of the Hubbard Model.
    J. Low Temp. Phys. 126 (2002) 1385. cond-mat/0106604
    Abstract
  31. V. Hankevych, I. Grote and F. Wegner:
    Pomeranchuk and other Instabilities in the t-t' Hubbard model at the Van Hove Filling.
    Phys. Rev. B 66 (2002) 094516.     cond-mat/0205213
    Abstract
  32. V. Hankevych and F. Wegner:
    Superconductivity and Instabilities in the t-t' Hubbard Model.
    Acta Phys. Pol. B 34 (2003) 497, Erratum 34 (2003) 1591
    Contributed paper to the International Conference on Strongly Correlated Electron Systems SCES'02 in Cracov, cond-mat/0205597.
    Abstract
  33. T. Stauber, A. Mielke:
    Equilibrium Correlation Functions of the Spin-Boson Model with Sub-Ohmic Bath.
    Phys. Lett. A 305 (2002) 275-280
    cond-mat/0207414.
    Abstract
  34. V. Hankevych and F. Wegner:
    Possible Phases of the Two-Dimensional t-t' Hubbard Model.
    Eur. Phys. Journal B 31 (2003) 497
    cond-mat/0207612.
    Abstract
  35. T. Stauber, A. Mielke:
    Flow Equations for Hamiltonians: Contrasting Different Flow Equations for a Numerically Solvable Model.
    J. Phys. A 36 (2003) 2707-2736 cond-mat/0209643.
    Abstract
  36. T. Stauber:
    Universal Asymptotic Behavior in Flow Equations of Dissipative Systems.
    Phys. Rev. B 68 (2003) 125102
    cond-mat/0211596.
    Abstract
  37. T. Stauber:
    Tomonaga-Luttinger model with impurity at weak two-body interaction.
    Phys. Rev. B 68 (2003) 125102
    cond-mat/0211598.
    Abstract
  38. T. Stauber:
    One-dimensional conductance through an arbitrary delta impurity
    Phys. Rev. B 69 (2004) 113315
    cond-mat/0301586.
    Abstract
  39. E. Koerding, F. Wegner:
    Flow Equations and Normal Ordering
    J. Phys. A 39 (2006) 1231-1237 cond-mat/0509801.
    Abstract
  40. F. Wegner:
    Flow Equations and Normal Ordering: A Survey
    J. Phys. A 39 (2006) 8221-8230 cond-mat/0511660.
    Abstract

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July 2003