Institut für Theoretische Physik




M. Qin, T. Schäfer, S. Andergassen, P. Corboz, and E. Gull

The Hubbard model: A computational perspective

Annual Review of Condensed Matter Physics 13, 275 (2022)


T. Schäfer, N. Wentzell, F. Simkovic, Y.-Y. He, C. Hille, M. Klett, C. J. Eckhardt, B. Arzhang, V. Harkov, F.-M. Le Regent, A. Kirsch, Yan Wang, A. J. Kim, E. Kozik, E. A. Stepanov, A. Kauch, S. Andergassen, P. Hansmann, D. Rohe, Y. M. Vilk, J. P. F. LeBlanc, S. Zhang, A.-M. S. Tremblay, M. Ferrero, O. Parcollet, and A. Georges

Tracking the footprints of spin fluctuations: A multi-method, multi-messenger study of the two-dimensional Hubbard model

Phys. Rev. X 11, 011058 (2021)


S. Andergassen, V. Meden, H. Schoeller, J. Splettstösser, and M. R. Wegewijs

Charge transport through single molecules, quantum dots, and quantum wires

Nanotechnology 21, 272001 (2010)



Recent publications


E. Moghadas, N. Dräger, A. Toschi, J. Zang, M. Medvidović, D. Kiese, A. J. Millis, A. M. Sengupta, S. Andergassen, and D. Di Sante

Compressing the two-particle Green's function using wavelets: Theory and application to the Hubbard atom


F. Carnazza, F. Carollo, S. Andergassen, G. Martius, M. Klopotek, and I. Lesanovsky

Machine learning stochastic differential equations for the evolution of order parameters of classical many-body systems in and out of equilibrium



M. Meixner, H. Menke, M. Klett, S. Heinzelmann, S. Andergassen, P. Hansmann, and T. Schäfer

Mott transition and pseudogap of the square-lattice Hubbard model: results from center-focused cellular dynamical mean-field theory

SciPost Phys. 16, 059 (2024)


S. Heinzelmann, A. Toschi, and S. Andergassen

Entangled magnetic, charge, and superconducting pairing correlations in the two-dimensional Hubbard model: a functional renormalization-group analysis



G. Cemin, F. Carnazza, S. Andergassen, G. Martius, F. Carollo, and I. Lesanovsky

Inferring interpretable dynamical generators of local quantum observables from projective measurements through machine learning

Phys. Rev. Applied 21, L041001 (2024)


P. Tscheppe, J. Zang, M. Klett, S. Karakuzu, A. Celarier, Z.Cheng, T. A. Maier, M. Ferrero, A. J. Millis, and T. Schäfer

Magnetism and Metallicity in Moiré Transition Metal Dichalcogenides

PNAS 121, 3 (2024)


K. Fraboulet and J.-P. Ebran

Addressing energy density functionals in the language of path-integrals II: Comparative study of functional renormalization group techniques applied to the (0+0)-D O(N)-symmetric φ4-theory

Eur. Phys. J. A 60, 45 (2024)


K. Fraboulet and J.-P. Ebran

Addressing energy density functionals in the language of path-integrals I: Comparative study of diagrammatic techniques applied to the (0+0)-D O(N)-symmetric φ4-theory

Eur. Phys. J. A 59, 91 (2023)


K. Fraboulet, S. Heinzelmann, P. M. Bonetti, A. Al-Eryani, D. Vilardi, A. Toschi, and S. Andergassen

Single-boson exchange functional renormalization group application to the two-dimensional Hubbard model at weak coupling

Eur. Phys. J. B 95, 202 (2022)


D. Maile, J. Ankerhold, S. Andergassen, W. Belzig, and G. Rastelli

Engineering the speedup of quantum tunneling in Josephson systems via dissipation

Phys. Rev. B 106, 045408 (2022)


F. Carnazza, F. Carollo, D. Zietlow, S. Andergassen, G. Martius, and I. Lesanovsky

Machine learning Markovian quantum master equations of few-body observables in interacting spin chains

New J. Phys. 24 073033 (2022)


P. Chalupa-Gantner, F. B. Kugler, C. Hille, J. von Delft, S. Andergassen, and A. Toschi 

Fulfillment of sum rules and Ward identities in the multiloop functional renormalization group solution of the Anderson impurity model

Phys. Rev. Research 4, 023050 (2022)


P. M. Bonetti, A. Toschi, C. Hille, S. Andergassen, and D. Vilardi

Single boson exchange representation of the functional renormalization group for strongly interacting many-electron systems

Phys. Rev. Research 4, 013034 (2022)


D. Maile, S. Andergassen, W. Belzig, and G. Rastelli

Exponential speedup of incoherent tunneling via dissipation

Phys. Rev. Research 3, 033019 (2021)


P. P. Mazza, D. Zietlow, F. Carollo, S. Andergassen, G. Martius, and I. Lesanovsky

Machine learning time-local generators of open quantum dynamics

Phys. Rev. Research 3, 023084 (2021)


P. Chalupa, T. Schäfer, M. Reitner, S. Andergassen, and A. Toschi

Fingerprints of the local moment formation and its Kondo screening in the generalized susceptibilities of many-electron problems

Phys. Rev. Lett. 126, 056403 (2021)


M. Klett, N. Wentzell, T. Schäfer, F. Simkovic, O. Parcollet, S. Andergassen, and P. Hansmann

Real-space cluster dynamical mean-field theory: Center-focused extrapolation on the one- and two particle levels

Phys. Rev. Research 2, 033476 (2020)


N. Wentzell, G. Li, A. Tagliavini, C. Taranto, G. Rohringer, K. Held, A. Toschi, and S. Andergassen

High-frequency asymptotic of the vertex function: Diagrammatic parametrization and algorithmic implementation

Phys. Rev. B 102, 085106 (2020) 


C. Hille, D. Rohe, C. Honerkamp, and S. Andergassen

Pseudogap opening in the two-dimensional Hubbard model: a functional renormalization group analysis

Phys. Rev. Research 2, 033068 (2020) 


C. Hille, F. B. Kugler, C. J. Eckhardt, Y.-Y. He, A. Kauch, C. Honerkamp, A. Toschi, and S. Andergassen

Quantitative functional renormalization-group description of the two-dimensional Hubbard model

Phys. Rev. Research 2, 033372 (2020)


D. Maile, S. Andergassen, and G. Rastelli

Effects of a dissipative coupling to the momentum of a particle in a double well potential

Phys. Rev. Research 2, 013226 (2020) 


A. Anthore, D. M. Kennes, E. Boulat, S. Andergassen, F. Pierre, and V. Meden

Universality at work - the local sine-Gordon model, lattice fermions, and quantum circuits

Eur. Phys. J. Special Topics 229, 663 (2020)


D. Maile, S. Andergassen, W. Belzig, and G. Rastelli

Dissipative frustration in a one-dimensional Josephson junction chain

Proceedings 12, 51 (2019)


A. Tagliavini, C. Hille, F. B. Kugler, S. Andergassen, A. Toschi, and C. Honerkamp

Multiloop functional renormalization group for the two-dimensional Hubbard model: Loop convergence of the response functions

SciPost Phys. 6, 009 (2019) 


D. Kennes, S. Andergassen, and V. Meden

Schaltkreise für Quantenphasenübergänge

Physik Journal 17, 20 (2018)


A. Tagliavini, S. Hummel, N. Wentzell, S. Andergassen, A. Toschi, and G. Rohringer

Efficient Bethe-Salpeter equations' treatment in dynamical mean-field theory

Phys. Rev. B 97, 235140 (2018)


M. Klett, H. Cartarius, D. Dast, J. Main, and G. Wunner

Topological edge states in the Su-Schrieffer-Heeger model subject to balanced particle gain and loss

Eur. Phys. J. D 72, 214 (2018)


I. Maldonado, J. Villavicencio, L. D. Contreras-Pulido, E. Cota, and J. A. Maytorena

Dephasing effects on ac-driven triple quantum dot systems

Phys. Rev. B 97, 195310 (2018)


D. Maile, S. Andergassen, W. Belzig, and G. Rastelli

Quantum phase transition with dissipative frustration

Phys. Rev. B 97, 155427 (2018) 


X. Cao, T. Ayral, Z. Zhong, O. Parcollet, D. Manske, and P. Hansmann

Chiral d-wave superconductivity in a triangular surface lattice mediated by long-range interaction

Phys. Rev. B 97, 155145 (2018) 


M. Klett, H. Cartarius, D. Dast, J. Main, and G. Wunner

Relation between PT-symmetry breaking and topologically nontrivial phases in the Su-Schrieffer-Heeger and Kitaev models

Phys. Rev. A 95, 053626 (2017) 


Y. Lu, Z. Zhong, M. W. Haverkort, and P. Hansmann

Origins of band and spin order in rare-earth nickelate bulk and heterostructures

Phys. Rev. B 95, 195117 (2017)  


G. W. Winkler, M. Ganahl, D. Schuricht, H. G. Evertz, and S. Andergassen

Interaction effects in a microscopic quantum wire model with strong spin-orbit interaction

New J. Phys. 19, 063009 (2017) 


Z. Zhong and P. Hansmann

Band alignment and charge transfer in complex oxides

Phys. Rev. X 7, 011023 (2017)


A. Dorda, M. Ganahl, S. Andergassen, W. von der Linden, and E. Arrigoni

Thermoelectric response of a correlated impurity in the nonequilibrium Kondo regime

Phys. Rev. B 94, 245125 (2016) 


N. Wentzell, S. Florens, T. Meng, V. Meden, and S. Andergassen

Magneto-electric spectroscopy of Andreev bound states in Josephson quantum dots

Phys. Rev. B 94, 0885151 (2016) 


G. Li, N. Wentzell, P. Pudleiner, P. Thunström, and K. Held

Efficient implementation of the parquet equations: Role of the reducible vertex function and its kernel approximation

Phys. Rev. B 93, 165103 (2016) 


A. Valli, T. Schäfer, P. Thunström, G. Rohringer, S. Andergassen, G. Sangiovanni, K. Held, and A. Toschi

Dynamical vertex approximation in its parquet implementation: Application to Hubbard nano-rings

Phys. Rev. B 91, 115115 (2015)


N. Wentzell, C. Taranto, A. Katanin, A. Toschi, and S. Andergassen

Correlated starting points for the functional renormalization group

Phys. Rev. B 91, 045120 (2015) 


S. Andergassen, D. Schuricht, M. Pletyukhov, and H. Schoeller

Dynamical transport in correlated quantum dots: A renormalization-group analysis

AIP Conference Proceedings 1633, 231 (2014)


I. Pizorn, V. Eisler, S. Andergassen, and M. Troyer

Real time evolution at finite temperatures with operator space matrix product states

New J. Phys. 16, 073007 (2014) 


C. Taranto, S. Andergassen, J. Bauer, K. Held, A. Katanin, W. Metzner, G. Rohringer, and A. Toschi

From infinite to two dimensions through the functional renormalization group

Phys. Rev. Lett. 112, 196402 (2014)


S. Donsa, S. Andergassen, and K. Held

Double quantum dot as a minimal thermoelectric generator

Phys. Rev. B 89, 125103 (2014)


S. Y. Müller, M. Pletyukhov, D. Schuricht, and S. Andergassen

Magnetic field effects on the finite-frequency noise and ac conductance of a Kondo quantum dot out of equilibrium

Phys. Rev. B 87, 245115 (2013)


S. Andergassen

A frustrated trio

Nature 495, 321 (2013)


D. Schuricht, S. Andergassen, and V. Meden

Local spectral properties of Luttinger liquids: Scaling versus nonuniversal energy scales

J. Phys.: Condens. Matter 25, 14003 (2012) 


S. Droste, S. Andergassen, and J. Splettstösser

Josephson current through interacting double quantum dots with spin-orbit coupling

J. Phys.: Condens. Matter 24, 425301 (2012) 


A. Gendiar, R. Krcmar, S. Andergassen, M. Daniska, and T. Nishino

Weak correlation effects in the Ising model on triangular-tiled hyperbolic lattices

Phys. Rev. E 86, 021105 (2012) 


S. Grap, V. Meden, and S. Andergassen

Interplay of Coulomb interaction and spin-orbit effects in multi-level quantum dots

Phys. Rev. B 86, 035143 (2012) 


S. Göttel, S. Andergassen, C. Honerkamp, D. Schuricht, and S. Wessel

Critical scales in anisotropic spin systems from functional renormalization

Phys. Rev. B 85, 214406 (2012) 


K. Grove-Rasmussen, S. Grap, J. Paaske, K. Flensberg, S. Andergassen, V. Meden, H. I. Jorgensen, K. Muraki, and T. Fujisawa

Unraveling the magnetic field dependence of tunnel couplings in carbon nanotube quantum dots: Tunable level renormalization

Phys. Rev. Lett. 108, 176802 (2012)


C. B. M. Hörig, D. Schuricht, and S. Andergassen

Renormalization-group analysis of a spin-1 Kondo dot: Non-equilibrium transport and relaxation dynamics

Phys. Rev. B 85, 064418 (2012)


S. Andergassen, T. A. Costi, and V. Zlatic

Mechanism for large thermoelectric power in molecular quantum dots described by the negative-U Anderson model

Phys. Rev. B 84, 241107(R) (2011) 


C. Karrasch, S. Andergassen, and V. Meden

Supercurrent through a serial quantum dot close to singlet-triplet degeneracy

Phys. Rev. B 84, 134512 (2011)


S. Andergassen, M. Pletyukhov, D. Schuricht, H. Schoeller, L. Borda

A renormalization-group analysis of the interacting resonant level model at finite bias: Generic analytic study of static properties and quench dynamics

Phys. Rev. B 83, 205103 (2011) 


S. Grap, S. Andergassen, J. Paaske, and V. Meden

Spin-orbit interaction and asymmetry effects on Kondo ridges at finite magnetic field

Phys. Rev. B 83, 115115 (2011) 


S. Y. Müller, V. Koerting, D. Schuricht, and S. Andergassen

Spin and orbital fluctuations in non-equilibrium transport through quantum dots: A renormalization-group analysis

Europhys. Lett. 92, 10002 (2010)


C. Karrasch, S. Andergassen, M. Pletyukhov, D. Schuricht, L. Borda, V. Meden, and H. Schoeller

Non-equilibrium current and relaxation dynamics of a charge-fluctuating quantum dot

Europhys. Lett. 90, 30003 (2010) 


S. Andergassen, D. Feinberg, S. Florens, M. Lavagna, S. Shiau, P. Simon, and R. Van Roermund

New trends for the Kondo effect in nanostructures

Int. J. Nanotechnology 7, 438 (2010)