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Program of the International CECAM-Workshop
Correlated electron physics beyond the Hubbard model

Bremen Center for Computational Materials Science - BCCMS 
University of Bremen, February 4th - February 8th 2019

Monday, February 4th 2019, H+ Hotel Bremen (formerly known as RAMADA Ueberseehotel)

18:00

21:00

 

Arrival and Registration

Tuesday, February 5th 2019 (House of Science Bremen, Downtown)

08:00

08:50

 

Registration

08:50

09:00

 

Opening and welcome, Tim Wehling

Session:

 

Dynamical Mean Field Theory and diagrammatic extensions thereof

 

 

Chair:

09:00

09:40

 

Philipp Werner, University of Fribourg, Switzerland
Ab-initio GW+DMFT simulation of correlated materials


09:40


10:20

Alexander Lichtenstein, University of Hamburg, Germany
Non-local electron vorrelations within dual variable approach

10:20

10:50

 

Coffee Break

10:50

11:30

 

Erik van Loon, Radboud University, Nijmegen, The Netherlands
Dual boson approach to spatial correlations

11:30

12:10

 

James LeBlanc, Memorial University of Newfoundland, St. John’s,
Canada
Non-local correlations via two-particle extensions of DMFT - beyond single-particle observables

12:10

12:15

 

Group Photo

12:15

13:50

 

Lunch Break (Restaurant Q1) and Coffee


13:50


14:30

Adriano Amaricci,  International School for Advanced Studies (SISSA), Trieste, Italy
Charge ordering and Wigner-Mott transition in extended Hubbard model

Session:

 

Quantum Cluster Approaches

 

 

 

 

Chair:

14:30

15:10

 

Emanuel Gull, University of Michigan, Ann Arbor, Michigan, USA
Properties of the charge ordered phase of the extended Hubbard model – results from cluster DMFT with non-local interactions

15:10

15:50

 

André-Marie Tremblay, University of Sherbrooke, Québec, Canada
Antagonistic effects of nearest-neighbor repulsion on the
superconducting pairing dynamics in the doped Mott insulator regime

15:50

16:20

 

Coffee Break

16:20

17:00

 

Markus Aichhorn, Graz University of Technology, Austria
Non-local correlations and interactions in the variational cluster approach

17:00

17:40

 

TBA

17:40

18:20

 

Thomas Ayral, École Polytechnique, Palaiseau, France
The Fierz convergence criterion: a controlled approach to strongly-interacting systems with small embedded clusters

18:20

19:00

 

Round Table Discussion
Diagrammatic and cluster extensions of DMFT: where are we?

19:30

21:30

 

Welcome Reception (TBA)

Wednesday, February 6th 2019 (House of Science Bremen, Downtown)

Session:

 

Coupled cluster, FCIQMC and related quantum chemical
approaches

 

 

 

 

Chair:

09:00

09:40

 

Lucas K. Wagner, University of Illinois at Urbana-Champaign,
Illinois, USA
Model Hamiltonians from ab-initio quantum Monte Carlo calculations

09:40

10:20

 

George Booth, University of Cambridge, United Kingdom
Ab initio screened environments coupled to strong correlation: new approaches inspired by quantum chemistry

10:20

10:50

 

Coffee Break

10:50

11:30

 

Dominika Zgid, University of Michigan, Ann Arbor, Michigan, USA
Self-energy embedding method with applications to molecules and solids

11:30

12:10

 

TBA

12:10

13:50

 

Lunch Break (Restaurant Q1) and Coffee

Session:

 

Constrained many-body perturbation theory, density functional theory and related methods I

 

 

 

 

Chair:

13:50

14:30

 

Matteo Cococcioni, Swiss Federal Institute of Technology, Lausanne, Switzerland
Ab initio modeling of transition metal compunds using the extended DFT+U+V with self-consistent Hubbard parameters

14:30

15:10

 

Ferdi Aryasetiawan, Lund University, Sweden
The impact of long-range interaction on the electronic structure of correlated materials

15:10

15:50

 

Malte Rösner, University of Southern California, Los Angeles, USA
cRPA simulations of layered materials

15:50

16:20

 

Coffee Break


16:20


17:00

TBA

17:00

17:40

 

Malte Schüler, University of Bremen, Germany
The Peierls-Feynman variational principle: applications to the extended Hubbard model and real materials

17:40

18:20

 

Round Table Discussion
Towards real materials: all ab-initio versus hybrid approaches in the wave function, Green function and density functional domain

18:40

 

 

 

Bus Pickup to Conference Dinner

(Venue: H+ Hotel, Wachtstraße)

19:00

22:30

 

Conference Dinner (Restaurant Juergenshof)

Thursday, February 7th 2019 (House of Science Bremen, Downtown)

Session:

 

Lattice Quantum Monte Carlo

 

 

 

 

Chair:

09:00

09:40

 

Stefan Wessel, RWTH Aachen University, Germany
Extended Hubbard models on square and honeycomb lattices: results from DQMC in the sign-free regime

09:40

10:20

 

Tom Devereaux, Stanford University, California, USA
Superconductivity in extended Hubbard models

10:20

10:50

 

Coffee Break

10:50

11:30

 

Shiwei Zhang, College of William & Mary, Williamsburg, Virginia, USA
Ground-state properties of the hydrogen chain, and beyond

11:30

12:10

 

Sandro Sorella, International School for Advanced Studies (SISSA), Trieste, Italy
Ab-initio molecular dynamics and structural optimization by quantum Monte Carlo

12:10

13:50

 

Lunch Break (Restaurant Q1) and Coffee

Session:

 

Diagrammatic Monte Carlo

 

 

 

 

Chair:

13:50

14:30

 

Boris Svistunov, University of Massachusetts Amherst, Massachusetts, USA
Polynomial complexity despite the fermionic sign

14:30

15:10

 

Nikolai Prokof'ev, University of Massachusetts Amherst, Massachusetts, USA
Stability of Dirac liquids with strong Coulomb interaction

Session:

 

Functional Renormalization Group

15:10

15:50

 

Sabine Andergassen, University of Tübingen, Germany
Realistic effective interactions from the functional renormalization group

15:50

16:30

 

Shan-Wen Tsai, University of California Riverside, California, USA
Effects of retardation in the functional renormalization group approach to interacting electrons

16:30

17:10

 

Carsten Honerkamp, RWTH Aachen University, Germany
Screened interactions from functional renormalization

17:10

17:50

 

Round Table Discussion
Numerically exact versus approximate approaches. 1.) Extended Hubbard model as benchmark system. 2.) Promising and practical approaches to multiband problems as arising in real materials?

19:00

21:30

 

Poster Session + Catering Buffet (House of Science)

Friday, February 8th 2019 (House of Science Bremen, Downtown)

Session:

Constrained many-body perturbation theory, density functional theory and related methods II

 

 

 

 

Chair:

09:00

09:40

 

TBA

09:40

10:20

 

Nicola Marzari, Swiss Federal Institute of Technology, Lausanne, Switzerland
Koopmans consistent approaches to spectral properties of correlated electron systems

10:20

10:50

 

Coffee Break

10:50

11:30

 

Mark van Schilfgaarde, King’s College London, United Kingdom
The quasi particle self-consistent GW+DMFT approach

11:30

12:30

 

Concluding Round Table Discussion
How to approach correlated materials with non-local interactions realistically: next steps

12:30

12:45

 

Closing words and Departure