Jacques C.R. Bloch

• Institute for Theoretical Physics
  University of Regensburg
  93040 Regensburg, Germany
  
• Tel.: +49 941 943-2018
• Fax: +49 941 943-3887
• E-Mail: jacques.bloch@physik.uni-regensburg.de
• web: http://homepages.uni-regensburg.de/~blj05290

Biographical sketch

• Since 2014 Staff member,  Institute for Theoretical Physics,University of Regensburg, Germany
• 2005-2013 Postdoctoral Fellow,  Institute for Theoretical Physics, University of Regensburg, Germany
• 2005 Postdoctoral Fellow,  Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
• 2004 Postdoctoral Fellow,  Billinge Group, Michigan State University, USA
• 2003-2004 Postdoctoral Fellow, WIAS Berlin, Germany
• 2001-2002 Postdoctoral Fellow, University of Tübingen, Germany
• 1999-2000 Research Fellow, University of Edinburgh, United Kingdom
• 1998-99 Postdoctoral Fellow, Argonne National Laboratory, USA
• 1996-98 Postdoctoral Fellow, University of Groningen, The Netherlands
• 1992-96 Ph.D., University of Durham, United Kingdom
• 1989-92 Software Project Manager, EPIM DATA, Belgium
• 1987-88 Research Assistant, Ghent University, Belgium
• 1986-87 Software Analyst, ESOP, Belgium
• 1984 M.Sc. in Computer Sciences, Ghent University, Belgium
• 1982 B.Sc. in Physics, Ghent University, Belgium

Publications

• Order-separated tensor-network method for QCD in the strong-coupling expansion,
  Thomas Samberger, Jacques Bloch, Robert Lohmayer, and Tilo Wettig, J. High Energ. Phys. 2026, 50 (2026) arXiv:2603.24487.


• Tensor-network formulation of QCD in the strong-coupling expansion,
  Thomas Samberger, Jacques Bloch, Robert Lohmayer, and Tilo Wettig, Nucl. Phys. B 1024 (2026) 117267 [arXiv:2508.09891].


• Grassmann higher-order tensor renormalization group approach for two-dimensional strong-coupling QCD,
  Jacques Bloch and Robert Lohmayer, Nuclear Physics B 986 (2023) 116032 [arXiv:2206.00545].


• Improved local truncation schemes for the higher-order tensor renormalization group method,
  Jacques Bloch, Robert Lohmayer, Maximilian Meister, and Michael Nunhofer, Nuclear Physics B 986 (2023) 116032 [arXiv:2210.02266].


• Grassmann tensor-network method for strong-coupling QCD,
  Jacques Bloch and Robert Lohmayer, Proceedings of The 39th International Symposium on Lattice Field Theorym PoS (LATTICE2022) 004 [arXiv:2210.08935].


• Tensor renormalization group study of the three-dimensional O(2) model,
  Jacques Bloch and Rhagav G. Jha, Robert Lohmayer, and Maximilian Meister, Phys. Rev. D 104 (2021) 94517 [arXiv:2105.08066].


• Tensor-network simulation of the strong-coupling U(N) model,
  Pascal Milde, Jacques Bloch, and Robert Lohmayer, Proceedings of The 38th International Symposium on Lattice Field Theory, PoS (LATTICE2021) 462 [arXiv:2112.01906].


• Effective ℤ₃ model for finite-density QCD with tensor networks,
  Jacques Bloch, Robert Lohmayer, Sophia Schweiß, and Judah Unmuth-Yockey, Proceedings of The 38th International Symposium on Lattice Field Theory, PoS (LATTICE2021) 062 [arXiv:2110.09499].


• Tensor-network study of the 3d O(2) model at non-zero chemical potential and temperature,
  Jacques Bloch, Robert Lohmayer, and Maximilian Meister, Proceedings of The 38th International Symposium on Lattice Field Theory, PoS (LATTICE2021) 285 [arXiv:2112.01414].


• Progress on Complex Langevin simulations of a finite density matrix model for QCD,
  Jacques Bloch, Jonas Glesaaen, Jacobus Verbaarschot, Savvas Zafeiropoulos, in 35th International Symposium on Lattice Field Theory (Lattice 2017) Granada, Spain, June 18-24, 2017, 2018, arXiv.1801.06456.


• Complex Langevin simulation of a random matrix model at nonzero chemical potential,
  Jacques Bloch, Jonas Glesaaen, Jacobus Verbaarschot, Savvas Zafeiropoulos, accepted for publication in JHEP [arXiv.1712.07514].


• Selected inversion as key to a stable Langevin evolution across the QCD phase boundary, Jacques Bloch and Olaf Schenk, 35th International Symposium on Lattice Field Theory (Lattice 2017) Granada, Spain, June 18-24, 2017, 2017, arXiv.1707.08874.


• Reweighted complex Langevin and its application to two-dimensional QCD,
  Jacques Bloch, Johannes Meisinger, and Sebastian Schmalzbauer, Proceedings of the 34rd International Symposium on Lattice Field Theory (Lattice 2016), Southampton, UK, July 24-30, 2016, PoS (LATTICE2016) (2016) 046 [arXiv:1701.01298].


• Reweighting complex Langevin trajectories,
  Jacques Bloch, Phys. Rev. D95 (2017) 054509 [arXiv:1701.00986].


• Complex Langevin simulations of a finite density matrix model for QCD,
  Jacques Bloch, Jonas Glesaaen, Owe Philipsen, Jacobus Verbaarschot, Savvas Zafeiropoulos, Proceedings of the 12th Quark Confinement and the Hadron Spectrum conference, Thessaloniki, 28.08-04.09.2016, EPJ Web of Conferences 137, 07030 (2017) [arXiv.1612.04621].


• Complex Langevin Dynamics in 1+1d QCD at Non-Zero Densities, Sebastian Schmalzbauer and Jacques Bloch, Proceedings of the 34th International Symposium on Lattice Field Theory (Lattice 2016), Southampton, UK, July 24-30, 2016, PoS (LATTICE2016) 362 [arXiv:1611.00702].


• Complex Langevin in low-dimensional QCD: the good and the not-so-good,
  J.C.R. Bloch, J. Mahr, and S. Schmalzbauer, Proceedings of the 33rd International Symposium on Lattice Field Theory (Lattice 2015) PoS (LATTICE2015) 158 [arXiv:1508.05252] [pdf].


• Positivity of center subsets for QCD,
  J.C.R. Bloch and F. Bruckmann, Phys. Rev. D93 (2016) 014508 [arXiv:1508.03522] [pdf].


• QPACE 2 and domain decomposition on the Intel Xeon Phi,
  Arts, P. & others, Proceedings of the 32nd International Symposium on Lattice Field Theory (Lattice 2014), PoS (LATTICE2014) 021 [arXiv:1502.04025] [pdf].


• Sign problem and subsets in one-dimensional QCD,
  J.C.R. Bloch, F. Bruckmann, and T. Wettig, Proceedings of the 31nd International Symposium on Lattice Field Theory (Lattice 2013), Mainz, Germany, July 29 - August 3, 2013, PoS (LATTICE2013) 194 [arXiv:1310.6645] [pdf].


• Subset method for one-dimensional QCD,
  J.C.R. Bloch, F. Bruckmann, and T. Wettig, JHEP 10 (2013) 140 [arXiv:1307.1416] [pdf].


• Subsets of configurations and canonical partition functions,
  J.C.R. Bloch, F. Bruckmann, M. Kieburg, K. Splittorff, and J.J.M. Verbaarschot, Phys. Rev. D 87 (2013) 034510 [arXiv:1211.3990] [pdf].


• A subset solution to the sign problem in random matrix simulations,
  J.C.R. Bloch, Phys. Rev. D 86 (2012) 074505 [arXiv:1205.5500] [pdf].


• Level spacings for weakly asymmetric real random matrices and application to two-color QCD with chemical potential,
  J.C.R. Bloch, F. Bruckmann, N. Meyer, S. Schierenberg, JHEP 08 (2012) 066 [arXiv:1204.6259] [pdf].


• Evading the sign problem in random matrix simulations,
  J.C.R. Bloch, proceedings of the XXIX International Symposium on Lattice Field Theory (Lattice 2011), Squaw Valley, USA, July 10-16 2011, PoS(Lattice 2011) 184 [arXiv:1111.4876] [pdf].
  
  
• Evading the sign problem in random matrix simulations,
  J.C.R. Bloch, Phys. Rev. Lett. 107 (2011) 132002 [arXiv:1103.3467] [pdf].
  
  
• The QCD sign problem and dynamical simulations of random matrices,
  J.C.R. Bloch and T. Wettig, JHEP 05 (2011) 048 [arXiv:1102.3715] [pdf].
  
  
• Geometry dependence of RMT-based methods to extract the low-energy constants Sigma and F,
  Ch. Lehner, J.C.R. Bloch, S. Hashimoto and T. Wettig, JHEP 05 (2011) 115 [arXiv:1101.5576] [pdf].
  
  
• A nested Krylov subspace method to compute the sign function of large complex matrices,
  J.C.R. Bloch and S. Heybrock, Comput. Phys. Commun. 182 (2011) 878-889 [arXiv:0912.4457] [pdf].
  
  
• A nested Krylov subspace method for the overlap operator,
  J.C.R. Bloch, S. Heybrock, proceedings of the XXVII International Symposium on Lattice Field Theory, Bejing, China, July 26-31 2009, PoS(LAT2009) 025 [arXiv:0910.2918] [pdf].
  
  
• Krylov subspace methods and the sign function: multishifts and deflation in the non-Hermitian case,
  J.C.R. Bloch, T. Breu, A. Frommer, S. Heybrock,  K. Schäfer, T. Wettig, proceedings of the XXVII International Symposium on Lattice Field Theory, Bejing, China, July 26-31 2009, PoS(LAT2009) 043 [arXiv:0910.2927] [pdf].
  
  
• Random matrix analysis of the QCD sign problem,
  J.C.R. Bloch and T. Wettig, proceedings of the XXVII International Symposium on Lattice Field Theory, Bejing, China, July 26-31 2009, PoS(LAT2009) 186 [arXiv:0910.1206] [pdf].
  
  
• Short-recurrence Krylov subspace methods for the overlap Dirac operator at nonzero chemical potential,
  J.C.R. Bloch, T. Breu, A. Frommer, S. Heybrock,  K. Schäfer, T. Wettig, Comput. Phys. Commun. 181 (2010) 1378 [arXiv:0910.1048] [pdf].
  
  
• Random matrix analysis of the QCD sign problem for general topology,
  J.C.R. Bloch and T. Wettig, JHEP 03 (2009) 100 [arXiv:0812.0324] [pdf].
  
  
• Comparing iterative methods to compute the overlap Dirac operator at nonzero chemical potential,
  J.C.R. Bloch, T. Breu, and T. Wettig, proceedings of the XXVI International Symposium on Lattice Field Theory, Williamsburg, Virginia, USA, July 14-19 2008, PoS(LATTICE 2008) 027 [arXiv:0810.4228] [pdf].
  
  
• Distributions of individual Dirac eigenvalues for QCD at non-zero chemical potential: RMT predictions and lattice results,
  G. Akemann, J.C.R. Bloch, L. Shifrin, and T. Wettig, proceedings of the XXV International Symposium on Lattice Field Theory, Regensburg, Germany, 30 Jul - 4 Aug 2007, PoS(LATTICE 2007) 224 [arXiv:0711.0629] [pdf].
  
  
• Individual complex Dirac eigenvalue distributions from random matrix theory and comparison to quenched lattice QCD with a quark chemical potential,
  G. Akemann, J.C.R. Bloch, L. Shifrin, and T. Wettig, Phys. Rev. Lett. 100 (2008) 032002 [arXiv:0710.2865] [pdf].
  
  
• An iterative method to compute the overlap Dirac operator at nonzero chemical potential,
  J.C.R. Bloch, A. Frommer, B. Lang, and T. Wettig, proceedings of the XXV International Symposium on Lattice Field Theory, Regensburg, Germany, 30 Jul - 4 Aug 2007, PoS(LATTICE 2007) 169 [arXiv:0710.0341] [pdf].
  
  
• Domain-wall and overlap fermions at nonzero quark chemical potential,
  J.C.R. Bloch and T. Wettig, Phys. Rev. D 76 (2007) 114511 [arXiv:0709.4630] [pdf].
  
  
• An iterative method to compute the sign function of a non-Hermitian matrix and its application to the overlap Dirac operator at nonzero chemical potential,
  J.C.R. Bloch, A. Frommer, B. Lang, and T. Wettig, Comput. Phys. Commun. 177 (2007) 933 [arXiv:0704.3486] [pdf].
  
  
• Nonzero chemical potential in the overlap Dirac operator and comparison to random matrix theory,
  J.C.R. Bloch and T. Wettig, proceedings of the 24th International Symposium on Lattice Field Theory (Lattice 2006), Tucson, Arizona, 23-28 Jul 2006, PoS LAT2006 (2006) 206 [hep-lat/0609020] [pdf].
  
  
• Overlap Dirac operator at nonzero chemical potential and random matrix theory,
  J.C.R. Bloch and T. Wettig, Phys. Rev. Lett. 97 (2006) 012003 [hep-lat/0604020] [pdf].
  
  
• PDFfit2 and PDFgui: Computer programs for studying nanostructure in crystals,
  C. L. Farrow, P. Juhas, J. W. Liu, D. Bryndin, J.C.R. Bloch, Th. Proffen and S. J. L. Billinge, J. Phys.: Condens. Matter 19 (2007) 335219 [pdf].
  
  
• Non-transcriptional pathway features reconstructed from secondary effects of RNA interference,
  F. Markowetz, J.C.R. Bloch, R. Spang, Bioinformatics 2005 21: 4026-4032 [pdf].
  
  
• Propagators and running coupling from SU(2) lattice gauge theory,
  J.C.R. Bloch, A. Cucchieri, K. Langfeld, T. Mendez, Nucl. Phys. B 687 (2004) 76 [hep-lat/0312036] [pdf].
  
  
• Regarding proton form factors,
  J.C.R. Bloch, A. Krassnigg and C.D. Roberts, Few Body Syst. 33 (2003) 219 [nucl-th/0306059] [pdf].
  
  
• Two-loop Improved Truncation of the Ghost-Gluon Dyson-Schwinger Equations:
  Multiplicatively Renormalizable Propagators and Nonperturbative Running Coupling, J.C.R. Bloch, Few Body Syst. 33 (2003) 111 [hep-ph/0303125] [pdf].
  
  
• Vortex induced confinement and the IR properties of Green functions,
  K. Langfeld, J.C.R. Bloch, A. Cucchieri, J. Gattnar, T. Mendes, H. Reinhardt, talk given at 5th International Conference on Quark Confinement and the Hadron Spectrum, Gargnano, Brescia, Italy, 10-14 Sep 2002 [hep-th/0209173] [pdf].
  
  
• Running coupling constant and propagators in SU(2) Landau gauge,
  J.C.R. Bloch, A. Cucchieri, K. Langfeld, T. Mendez, talk given at 20th International Symposium on Lattice Field Theory (LATTICE 2002), Boston, Massachusetts, 24-29 Jun 2002, Nucl. Phys. Proc. Suppl. 119 (2003) 736 [hep-lat/0209040] [pdf].
  
  
• Multiplicative renormalizability and quark propagator,
  J.C.R. Bloch, Phys. Rev. D 66 (2002) 034032 [hep-ph/0202073] [pdf].
  
  
• Multiplicative renormalizability of gluon and ghost propagators in QCD,
  J.C.R. Bloch, Phys. Rev. D 64 (2001) 116011 [hep-ph/0106031] [pdf].
  
  
• Selected nucleon form factors and a composite scalar diquark,
  J.C.R. Bloch, C.D. Roberts and S.M. Schmidt, Phys. Rev. C 61 (2000) 065207 [nucl-th/9911068] [pdf].
  
  
• Memory effects and thermodynamics in strong field plasmas,
  J.C.R. Bloch, C.D. Roberts and S.M. Schmidt, Phys. Rev. D 61 (2000) 117502 [nucl-th/9910073] [pdf].
  
  
• K → π π and a light scalar meson,
  J.C.R. Bloch, M.A. Ivanov, T. Mizutani, C.D. Roberts and S.M. Schmidt, Phys. Rev. C 62 (2000) 025206 [nucl-th/9910029] [pdf].
  
  
• Nucleon form factors and a nonpointlike diquark,
  J.C.R. Bloch, C.D. Roberts, S.M. Schmidt, A. Bender, M.R. Frank, Phys. Rev. C 60 (1999) 062201(R) [nucl-th/9907120] [pdf].
  
  
• Diquark condensation and the quark-quark interaction,
  J.C.R. Bloch, C.D. Roberts and S.M. Schmidt, Phys. Rev. C 60 (1999) 065208 [nucl-th/9907086] [pdf].
  
  
• Pair creation: back-reactions and damping,
  J.C.R. Bloch, V.A. Mizerny, A.V. Prozorkevich, C.D. Roberts, S.M. Schmidt, S.A. Smolyansky and D.V. Vinnik, Phys. Rev. D 60 (1999) 116011 [nucl-th/9907027 ] [pdf].
  
  
• Describing a₁ and b₁ decays,
  J.C.R. Bloch, Yu.L. Kalinovsky, C.D. Roberts and S.M. Schmidt, Phys. Rev. D 60 (1999) 111502 (R) [nucl-th/9906038] [pdf].
  
  
• QCD in the Infrared with Exact Angular Integrations,
  D. Atkinson and J.C.R. Bloch, Mod. Phys. Lett. A 13 (1998) 1055 [hep-ph/9802239] [pdf].
  
  
• Running Coupling in Non-Perturbative QCD - I. Bare Vertices and y-max Approximation,
  D. Atkinson and J.C.R. Bloch, Phys. Rev. D 58 (1998) 094036 [hep-ph/9712459] [pdf].
  
  
• Numerical Investigation of Fermion Mass Generation in QED,
  J.C.R. Bloch, Ph.D. thesis - University of Durham, November 1995 [hep-ph/0208074] [pdf].
  
  
• Can the photon quadratic divergence be cancelled numerically ?,
  J.C.R. Bloch and M.R. Pennington, Mod. Phys. Lett. A 10 (1995) 1225 [hep-ph/9501411] [pdf].
  
  
• Critical coupling in strong QED with weak gauge dependence,
  D. Atkinson, J.C.R. Bloch, V.P. Gusynin, M.R. Pennington and M. Reenders, Phys. Lett. B 329 (1994) 117 [pdf].
  
  
• Influence of 2p-2h Ground State Correlations on Charge Distributions of Doubly-Closed Shell Nuclei,
  M. Waroquier, J.C.R. Bloch, G. Wenes and K. Heyde, Phys. Rev. C 28 (1983) 1791 [pdf].