Thomas Barthel

Charles H. Townes Assistant Professor        

Department of Physics
Duke University
PO box 90305
Durham, NC 27708, USA

contact:   +1 919 660-2965
+49 176 56708553
office 287

         



I am interested in quantum many-particle systems. In particular:


Publications. -- Please don't hesitate to contact me, if you want to point out or ask something.
chronological topical


  "One-dimensional quantum systems at finite temperatures can be simulated efficiently on classical computers"
T. Barthel
arXiv:1708.09349, pdf
 

  "Symmetric minimally entangled typical thermal states for canonical and grand-canonical ensembles"
M. Binder and T. Barthel
arXiv:1701.03872, pdf, Phys. Rev. B 95, 195148 (2017)
 

  "Matrix product purifications for canonical ensembles and quantum number distributions"
T. Barthel
arXiv:1607.01696, pdf, Phys. Rev. B 94, 115157 (2016)
 

  "Finite-temperature effects on interacting bosonic one-dimensional systems in disordered lattices"
L. Gori, T. Barthel, A. Kumar, E. Lucioni, L. Tanzi, M. Inguscio, G. Modugno, T. Giamarchi, C. D'Errico, and G. Roux
arXiv:1512.04238, pdf, Phys. Rev. A 93, 033650 (2016)
 

  "A matrix product algorithm for stochastic dynamics on locally tree-like graphs"
T. Barthel, C. De Bacco, and S. Franz
arXiv:1508.03295, pdf
 

  "Phase Diagram of an Extended Quantum Dimer Model on the Hexagonal Lattice"
T. M. Schlittler, T. Barthel, G. Misguich, J. Vidal, and R. Mosseri
arXiv:1507.04643, pdf, Phys. Rev. Lett. 115, 217202 (2015)
 

  "Phase diagram of the hexagonal lattice quantum dimer model: order parameters, ground-state energy, and gaps"
T. M. Schlittler, R. Mosseri, and T. Barthel
arXiv:1501.02242, pdf
 

  "Minimally entangled typical thermal states versus matrix product purifications for the simulation of equilibrium states and time evolution"
M. Binder and T. Barthel
arXiv:1411.3033, pdf, Phys. Rev. B 92, 125119 (2015)
 

  "Bound states and entanglement in the excited states of quantum spin chains"
J. Mölter, T. Barthel, U. Schollwöck, and V. Alba
arXiv:1407.0066, pdf, J. Stat. Mech. P10029 (2014),
Special Issue "Quantum Entanglement in Condensed Matter Physics" J. Stat. Mech. 2014
 

  "Multispinon continua at zero and finite temperature in a near-ideal Heisenberg chain"
B. Lake, D. A. Tennant, J.-S. Caux, T. Barthel, U. Schollwöck, S. E. Nagler, and C. D. Frost
arXiv:1307.4071, pdf, Phys. Rev. Lett. 111, 137205 (2013)
 

  "Domain-wall melting in ultracold-boson systems with hole and spin-flip defects"
J. C. Halimeh, A. Wöllert, I. P. McCulloch, U. Schollwöck, and T. Barthel
arXiv:1307.0513, pdf, Phys. Rev. A 89, 063603 (2014)
 

  "Algebraic versus exponential decoherence in dissipative many-particle systems"
Z. Cai and T. Barthel
arXiv:1304.6890, pdf, Phys. Rev. Lett. 111, 150403 (2013),
covered by Phys.org "Quantum particles find safety in numbers" phys.org, 10/16/2013
 

  "Precise evaluation of thermal response functions by optimized density matrix renormalization group schemes"
T. Barthel
arXiv:1301.2246, pdf, New J. Phys. 15, 073010 (2013)
 

  "Scaling of the thermal spectral function for quantum critical bosons in one dimension"
T. Barthel, U. Schollwöck, and S. Sachdev
arXiv:1212.3570, pdf
 

  "Quasi-locality and efficient simulation of Markovian quantum dynamics"
T. Barthel and M. Kliesch
arXiv:1111.4210, pdf, Phys. Rev. Lett. 108, 230504 (2012)
 

  "Solving condensed matter ground state problems by semidefinite relaxations"
T. Barthel and R. Hübener
arXiv:1106.4966, pdf, Phys. Rev. Lett. 108, 200404 (2012)
 

  "Dissipative quantum Church-Turing theorem"
M. Kliesch, T. Barthel, C. Gogolin, M. Kastoryano, and J. Eisert
arXiv:1105.3986, pdf, Phys. Rev. Lett. 107, 120501 (2011),
see also D. Browne "Viewpoint: Quantum simulation hits the open road" Physics 4, 72 (2011)
 

  "Real-space renormalization yields finitely correlated states"
T. Barthel, M. Kliesch, and J. Eisert
arXiv:1003.2319, pdf, Phys. Rev. Lett. 105, 010502 (2010)
 

  "Contraction of fermionic operator circuits and the simulation of strongly correlated fermions"
T. Barthel, C. Pineda, and J. Eisert
arXiv:0907.3689, pdf, Phys. Rev. A 80, 042333 (2009),
also in Virtual Journal of Nanoscale Science and Technology 20, Issue 20 (2009),
and in Virtual Journal of Quantum Information 9, Issue 11 (2009)
 

  "Unitary circuits for strongly correlated fermions"
C. Pineda, T. Barthel, and J. Eisert
arXiv:0905.0669, pdf, Phys. Rev. A 81, 050303(R) (2010)
 

  "Spectral functions in one-dimensional quantum systems at finite temperature using the density matrix renormalization group"
T. Barthel, U. Schollwöck, and S. R. White
arXiv:0901.2342, pdf, Phys. Rev. B 79, 245101 (2009)
 

  "Magnetism, coherent many-particle dynamics, and relaxation with ultracold bosons in optical superlattices"
T. Barthel, C. Kasztelan, I. P. McCulloch, and U. Schollwöck
arXiv:0809.5141, pdf, Phys. Rev. A 79, 053627 (2009)
 

  "Quasiperiodic Bose-Hubbard model and localization in one-dimensional cold atomic gases"
G. Roux, T. Barthel, I. P. McCulloch, C. Kollath, U. Schollwöck, and T. Giamarchi
arXiv:0802.3774, pdf, Phys. Rev. A 78, 023628 (2008)
 

  "Dephasing and the steady state in quantum many-particle systems"
T. Barthel and U. Schollwöck
arXiv:0711.4896, pdf, Phys. Rev. Lett. 100, 100601 (2008),
also in Virtual Journal of Quantum Information 8, Issue 3 (2008)
 

  "Entanglement entropy in collective models"
J. Vidal, S. Dusuel, and T. Barthel
arXiv:cond-mat/0610833, pdf, J. Stat. Mech. P01015 (2006)
 

  "Entanglement entropy beyond the free case"
T. Barthel, S. Dusuel, and J. Vidal
arXiv:cond-mat/0606436, pdf, Phys. Rev. Lett. 97, 220402 (2006),
also in Virtual Journal of Nanoscale Science and Technology 14, Issue 24 (2006)
 

  "Entanglement scaling in critical two-dimensional fermionic and bosonic systems"
T. Barthel, M.-C. Chung, and U. Schollwöck
arXiv:cond-mat/0602077, pdf, Phys. Rev. A 74, 022329 (2006)
 

  "Entanglement and boundary critical phenomena"
H.-Q. Zhou, T. Barthel, J. O. Fjærestad, and U. Schollwöck
arXiv:cond-mat/0511732, pdf, Phys. Rev. A 74, 050305(R) (2006),
also in Virtual Journal of Nanoscale Science and Technology 14, Issue 23 (2006)
 



Talks.
  • 1D quantum systems at finite temperature can be simulated efficiently on classical computers -- Munich 06/2017, Orsay 07/2017, Paris 07/2017
  • Entanglement and computational complexity for 1D quantum many-body systems -- Durham 03/2017, Wilmington 04/2017
  • A novel matrix product algorithm for stochastic dynamics on networks -- Baltimore 03/2016
  • Accurate T>0 response functions for strongly-correlated quasi-1D systems using DMRG -- Durham NC 09/2015
  • Devil's staircase in a quantum dimer model on the hexagonal lattice -- Aachen 05/2015, Göttingen 06/2015
  • Strongly-correlated systems at finite T: METTS versus purifications -- Berlin 03/2015,
  • Quantum dimers on the honeycomb lattice, phase diagram with devil's staircase -- Berlin 03/2015,
  • Finite-temperature DMRG simulations of the Bose-Hubbard model -- Palaiseau 01/2015
  • Efficient parametrization and simulation of condensed matter systems using tensor network states -- Durham NC 04/2014
  • Simulating condensed matter systems with tensor network states and discovery of algebraic decoherence -- Charlottesville 01/2014, Lyon 03/2014, Saclay 03/2014
  • Tensor network state techniques for condensed matter systems and applications -- Garching 11/2013
  • Algebraic versus exponential decoherence in dissipative many-particle systems -- Garching 10/2013, Orsay 11/2013, Paris 11/2013, Augsburg 01/2014, Houston 02/2014, Toulouse 04/2014, Durham NC 04/2014
  • DMRG, tDMRG, matrix product states, and matrix product operators -- Munich 10/2013
  • Optimized tDMRG schemes for the computation of T>0 response functions and applications -- Turunç-Marmaris 08/2013, Munich 10/2013
  • Domain-wall melting in ultracold boson systems with defects -- Munich 07/2013
  • Tensor network state techniques and entanglement in condensed matter systems -- Paris 04/2013
  • Universal thermal spectral function for quantum critical bosons and optimized tDMRG schemes for T>0 response functions -- Dresden 01/2013
  • Lieb-Robinson bound on the speed of information transfer and consequences -- Munich 10/2012
  • Solving condensed matter and chemistry ground state problems by semidefinite relaxations -- Dresden 09/2012
  • Dynamics of open quantum systems: Quasi-locality and efficient simulation -- Frankfurt am Main 12/2011, Munich 02/2012, Stuttgart 03/2012, Heidelberg 04/2012, Durban 09/2012
  • Semidefinite relaxations of the condensed matter groundstate problem -- Potsdam 07/2011, Stuttgart 03/2012, Heidelberg 04/2012, Paris 09/2012, Munich 11/2012
  • Entanglement in condensed matter groundstates -- Santa Barbara 11/2010
  • Fermionic tensor network states for the simulation of molecules -- Zürich 03/2010
  • Entanglement in many body systems and tensor network state methods -- Santa Barbara 01/2010, Günzburg 05/2010, Dresden 06/2010, Golm 07/2010, Beijing 09/2010
  • Verschränkung in Vielteilchensystemen und Simulationsmethoden -- Aachen 12/2009
  • Quantum Monte Carlo methods and the sign problem -- Potsdam 11/2009
  • Simulating higher-dimensional fermionic systems on classical computers -- Potsdam 05/2009
  • Magnetism and many-particle dynamics with bosons in an optical superlattice -- Dresden 03/2009, Berlin 06/2009
  • Disorder and localization for ultracold bosons in incommensurate 1d superlattices -- Munich 10/2008
  • Dephasing and the steady state in quantum many-particle systems -- Aachen 11/2007, Berlin 02/2008, New Orleans 03/2008, Heidelberg 03/2008
  • Entanglement entropy in many-particle groundstates -- Aachen 07/2007
  • Matrix product state algorithms -- Altenberg 02/2005



Course webpages.


Tutoring and problem sets.

have a nice day!