Prof. Dr. Nils Blümer

Publications

• H. Shinaoka, F. Assaad, N. Blümer, and P. Werner
  Quantum Monte Carlo impurity solvers for multi-orbital problems and frequency-dependent interactions
  Eur. Phys. J. Spec. Top. 226, 2499 (2017).

• P. Pudleiner, T. Schäfer, D. Rost, G. Li, K. Held, and N. Blümer
  Momentum structure of the self-energy and its parametrization for the two-dimensional Hubbard model
  Phys. Rev. B 93, 195134 (2016) [arXiv:1602.03748].

• T. Schäfer, F. Geles, D. Rost, G. Rohringer, E. Arrigoni, K. Held, N. Blümer, M. Aichhorn, and A. Toschi
  Fate of the false Mott-Hubbard transition in two dimensions
  Phys. Rev. B 91, 125109 (2015) [arXiv:1405.7250].

• D. Rost and N. Blümer
  Deciding the fate of the false Mott transition in two dimensions by exact quantum Monte Carlo methods
  J. Phys.: Conf. Ser. 640, 012047 (2015).

• E. V. Gorelik and N. Blümer
  Tunable nanomagnetism in moderately cold fermions on optical lattices
  Phys. Rev. A 89, 063622 (2014) [arXiv:1405.0404].

• Chia-Chen Chang, Richard T. Scalettar, Elena V. Gorelik, and Nils Blümer
  Discriminating antiferromagnetic signatures in ultracold fermions by tunable geometric frustration
  Phys. Rev. B 88, 195121 (2013) [arXiv:1306.4687].

• D. Rost, F. Assaad, and N. Blümer
  Quasi continuous-time impurity solver for the dynamical mean-field theory with linear scaling in the inverse temperature
  Phys. Rev. E 87, 053305 (2013) [arXiv:1303.2004].

• E. Jakobi, N. Blümer, and P.G.J. van Dongen
  Orbital-selective Mott transitions in a doped two-band Hubbard model with crystal field splitting
  Phys. Rev. B 87, 205135 (2013) [arXiv:1301.7252].

• N. Blümer and E. V. Gorelik
  Mott transitions in the half-filled SU(2M) symmetric Hubbard model
  Phys. Rev. B 87, 085115 (2013) [arXiv:1212.4485].

• D. Rost, E. V. Gorelik, F. Assaad, and N. Blümer
  Momentum-dependent pseudogaps in the half-filled two-dimensional Hubbard model
  Phys. Rev. B 86, 155109 (2012) [arXiv:1205.6788].

• E. V. Gorelik, D. Rost, T. Paiva, R. Scalettar, A. Klümper, and N. Blümer
  Universal probes for antiferromagnetic correlations and entropy in cold fermions on optical lattices
  Phys. Rev. A 85, 061602(R) (2012) [arXiv:1201.5576].

• Nils Blümer
  Hirsch-Fye Quantum Monte Carlo Method for Dynamical Mean-Field Theory
  in The LDA+DMFT approach to strongly correlated materials Eds: Eva Pavarini, Erik Koch, Dieter Vollhardt, and Alexander Lichtenstein, Forschungszentrum Jülich GmbH, Institute for Advanced Simulations, ISBN 978-3-89336-734-4 (2011).

• Elena V. Gorelik and Nils Blümer
  Antiferromagnetism of Lattice Fermions in an Optical Trap: the Dynamical Mean-Field Perspective
  J. Low Temp. Phys. 165, 195 (2011).

• E. V. Gorelik, T. Paiva, R. Scalettar, A. Klümper, and N. Blümer
  Double occupancy as a universal probe for antiferromagnetic correlations and entropy in cold fermions on optical lattices
  [arXiv:1105.3356].

• N. Blümer and E. V. Gorelik
  Quantum Monte Carlo simulations of antiferromagnetism in ultracold fermions on optical lattices within real-space dynamical mean-field theory
  Comp. Phys. Comm. 118, 115 (2011) [arXiv:1006.2716].

• E. V. Gorelik, I. Titvinidze, W. Hofstetter, M. Snoek, and N. Blümer
  Néel transition of lattice fermions in a harmonic trap: a real-space dynamical mean-field study
  Phys. Rev. Lett. 105, 065301 (2010) [arXiv:1004.4857].

• E. Jakobi, N. Blümer, and P. van Dongen
  Orbital-selective Mott transitions in a doped two-band Hubbard model
  Phys. Rev. B 80, 115109 (2009) [arXiv:0906.2996].

• E. V. Gorelik, N. Blümer
  Mott transitions in ternary flavor mixtures of ultracold fermions on optical lattices
  Phys. Rev. A 80, 051602(R) (2009) [arXiv:0904.4610]. Selected for Virtual Journal of Atomic Quantum Fluids (Volume 1, Issue 6): abstract.

• N. Blümer
  Multigrid Hirsch-Fye quantum Monte Carlo method for dynamical mean-field theory
  arXiv:0801.1222.

• N. Blümer
  Numerically exact Green functions from Hirsch-Fye quantum Monte Carlo simulations
  arXiv:0712.1290.

• N. Blümer
  Efficiency of quantum Monte Carlo impurity solvers for dynamical mean-field theory
  Phys. Rev. B 76, 205120 (2007) [arXiv:0708.1749v3].

• P.G.J. van Dongen, C. Knecht, and N. Blümer
  Magnetic phase diagram of the anisotropic multi-band Hubbard model
  phys. stat. sol. (b) 244, 2331 (2007).

• N. Blümer, C. Knecht, K. Pozgajcic, and P.G.J. van Dongen
  Orbital-selective Mott transitions in two-band Hubbard models
  J. Magn. Magn. Mat. 310, 922 (2007) [cond-mat/0609758].

• K. Held, I.A. Nekrasov, G. Keller, V. Eyert, N. Blümer, A.K. McMahan, R.T. Scalettar, Th. Pruschke, V.I. Anisimov, and D. Vollhardt
  Realistic investigations of correlated electron systems with LDA+DMFT
  phys. stat. sol. (b) 243, 2599 (2006) [Psi-k Newsletter #56, p. 65-103 (April 2003)].

• P. G. J. van Dongen, C. Knecht, and N. Blümer
  Orbital-selective Mott transitions in the 2-band J_z-model: a high-precision quantum Monte Carlo study
  phys. stat. sol. (b) 243, 116 (2006) [cond-mat/0507682].

• C. Knecht, N. Blümer, and P.G.J. van Dongen
  Reply to "Comment on `Orbital-selective Mott transitions in the anisotropic two-band Hubbard model at finite temperatures'"
  cond-mat/0506450.

• C. Knecht, N. Blümer, and P.G.J. van Dongen
  Orbital-selective Mott transitions in the anisotropic two-band Hubbard model at finite temperatures
  Phys. Rev. B 72, 081103(R) (2005) [cond-mat/0505106].

• M. Kollar, M. Eckstein, K. Byczuk, N. Blümer, P. van Dongen, M. H. Radke de Cuba, W. Metzner, D. Tanaskovic, V. Dobrosavljevic, G. Kotliar, and D. Vollhardt
  Green functions for nearest- and next-nearest-neighbor hopping on the Bethe lattice
  Ann. Phys. (Leipzig) 14, 642 (2005) [cond-mat/0504637].

• N. Blümer and E. Kalinowski
  Ground state of the frustrated Hubbard model within DMFT: energetics of Mott insulator and metal from ePT and QMC
  Physica B 359-361, 648 (2005) [cond-mat/0407442].

• N. Blümer and E. Kalinowski
  Mott insulator: Tenth-order perturbation theory extended to infinite order using a quantum Monte Carlo scheme
  Phys. Rev. B 71, 195102 (2005) [cond-mat/0404568].

• N. Blümer and P. G. J. van Dongen
  Transport properties of correlated electrons in high dimensions
  in "Concepts in Electron Correlation", Eds.: Alex C. Hewson, Veljko Zlatic, NATO Science Series, ISBN 1-4020-1419-8, Kluwer (2003) [cond-mat/0303204].

• M. Jourdan, N. Blümer, and H. Adrian
  Superconductivity of SrTiO_3-δ
  Eur. Phys. J. B 33, 25 (2003) [cond-mat/0212649].

• N. Blümer
  Mott-Hubbard Metal-Insulator Transition and Optical Conductivity in High Dimensions
  Thesis, University of Augsburg (2002) and Shaker, Aachen, ISBN 3-8322-2320-7 (2003).

• K. Held, I.A. Nekrasov, G. Keller, V. Eyert, N. Blümer, A.K. McMahan, R.T. Scalettar, T.Pruschke, V.I. Anisimov, and D. Vollhardt
  The LDA+DMFT Approach to Materials with Strong Electronic Correlations
  Quantum Simulations of Complex Many-Body Systems: From Theory to Algorithms,
  Eds.: J. Grotendorst, D. Marx, and A. Muramatsu,
  NIC Series 10, 175 (Forschungszentrum Jülich, 2002) [EKM-TP3/28-01].

• N. Blümer, K. Held, G. Keller, and D. Vollhardt
  Metal-Insulator Transition and Realistic Modelling of Correlated Electron Systems
  NIC Symposium 2001, Eds.: Horst Rollnik, Dietrich Wolf,
  NIC Series 9, 347 (Forschungszentrum Jülich, 2002) [EKM-TP3/26-01].

• K. Held, I.A. Nekrasov, N. Blümer, V.I. Anisimov, and D. Vollhardt
  Realistic modeling of strongly correlated electron systems: An introduction to the LDA+DMFT approach
  Int. J. Mod. Phys. B 15, 2611 (2001) [EKM-TP3/20-00, cond-mat/0010395].

• D. Vollhardt, N. Blümer, K. Held, and M. Kollar
  Metallic Ferromagnetism - an Electronic Correlation Phenomenon
  Lecture Notes in Physics, Vol. 580, (Springer, Heidelberg, 2001) p. 191-207 [EKM-TP3/30-00, cond-mat/0012203].

• I.A. Nekrasov, K. Held, N. Blümer, A.I. Poteryaev, V.I. Anisimov, and D. Vollhardt
  Calculation of photoemission spectra of the doped Mott insulator La_1-xSr_xTiO₃ using LDA+DMFT(QMC)
  Eur. Phys. J. B 18, 55 (2000) [EKM-TP3/07-00, cond-mat/0005207].

• J. Schlipf, M. Jarrell, P. G. J. van Dongen, N. Blümer, S. Kehrein, Th. Pruschke, D. Vollhardt
  Absence of hysteresis at the Mott-Hubbard metal-insulator transition in infinite dimensions
  Phys. Rev. Lett. 82, 4890 (1999) [EKM-TP3/01-99, cond-mat/9902267].

• D. Vollhardt, N. Blümer, K. Held, M. Kollar, J. Schlipf, M. Ulmke, and J. Wahle
  Metallic ferromagnetism: Progress in our understanding of an old strong-coupling problem
  Advances in Solid State Physics 38, 383 (1999) [EKM-TP3/09-98, cond-mat/9804112].

• J. Wahle, N. Blümer, J. Schlipf, K. Held, and D. Vollhardt
  Microscopic conditions favoring itinerant ferromagnetism
  Phys. Rev. B 58, 12749 (1998) [EKM-TP3/09-97, cond-mat/9711242].

• K. Held, M. Ulmke, N. Blümer, and D. Vollhardt
  Correlated-electron theory of strongly anisotropic metamagnets
  Phys. Rev. B 56, 14469 (1997) [EKM-TP3/03-97, cond-mat/9704209].

• D. Vollhardt, N. Blümer, K. Held, M. Kollar, J. Schlipf, and M. Ulmke
  Non-perturbative approaches to magnetism in strongly correlated electron systems
  Z. Phys. B 103, 283 (1997) [EKM-TP3/01-97, cond-mat/9701150].

• N. Blümer
  Quanten-Monte-Carlo-Untersuchungen von magnetischen Phasen im Hubbard-Modell mit Nächst-Nachbar-Wechselwirkungen
  Diplomarbeit, RWTH Aachen (1996).