Variational approach to quantum many-body systems

Variational methods for correlated systems

Recent Publications:

  • P. Schindler, T. Guaita, T. Shi, E. Demler, J. I. Cirac, A Variational Ansatz for the Ground State of the Quantum Sherrington-Kirkpatrick Model, Phys. Rev. Lett. 129:220401 (2022). https://doi.org/10.1103/PhysRevLett.129.220401
  • T. Guaita, L. Hackl, T. Shi, E. Demler, J. I. Cirac, Generalization of group-theoretic coherent states for variational calculations, Phys. Rev. Research 3:023090 (2021). https://doi.org/10.1103/PhysRevResearch.3.023090
  • T. Shi, E. Demler, J. I. Cirac, A variational approach for many-body systems at finite temperature, Phys. Rev. Lett. 125:180602 (2020). https://doi.org/10.1103/PhysRevLett.125.180602
  • Y. Wang, I. Esterlis, T. Shi, J. I. Cirac, E. Demler, Zero-Temperature Phases of the 2D Hubbard-Holstein Model, Phys. Rev. Research 2:043258 (2020). https://doi.org/10.1103/PhysRevResearch.2.043258
  • L. Hackl, T. Guaita, T. Shi, J. Haegeman, E. Demler, I. Cirac, Geometry of variational methods: dynamics of closed quantum systems, SciPost Phys 9:048 (2020). https://doi.org/10.21468/SciPostPhys.9.4.048
  • T. Shi, J. I. Cirac, E. Demler, Ultrafast molecular dynamics in terahertz-STM experiments, Phys. Rev. Research 2:033379 (2020). https://doi.org/10.1103/PhysRevResearch.2.033379
  • Y. Ashida, T. Shi, R. Schmidt, H. R. Sadeghpour, J. I. Cirac, E. Demler, Quantum Rydberg Central Spin Model, Phys. Rev. Lett. 123:183001 (2019). https://doi.org/10.1103/PhysRevLett.123.183001
  • T. Guaita, L. Hackl, T. Shi, C. Hubig, E. Demler, J. I. Cirac, Gaussian time dependent variational principle for the Bose-Hubbard model, Phys. Rev. B 100:094529 (2019). https://doi.org/10.1103/PhysRevB.100.094529
  • T. Shi, E. Demler, I. Cirac, Variational Study of Fermionic and Bosonic Systems with Non-Gaussian States, Ann. Phys. 390:245 (2018).
  • Y. Ashida, T. Shi, M. C. Banuls, I. Cirac, E. Demler, Solving quantum impurity problems ..., Phys. Rev. Lett. 121:026805 (2018).
  • P. Sala, T. Shi, S. Kuhn, M. C. Banuls, E. Demler, J. I. Cirac, Variational study of U(1) and SU(2) lattice gauge theories, Phys. Rev. D 98:034505 (2018).