Forthcoming Seminars at F-1

22 Jun 2018
Yicheng ZhangInformation measures for a local quantum phase transition:
Lattice fermions in a one-dimensional harmonic trap
We use quantum information measures to study the local quantum phase transition that occurs for trapped spinless fermions in one-dimensional lattices. We focus on the case of a harmonic confinement~[1]. The transition occurs upon increasing the characteristic density and results in the formation of a band-insulating domain in the center of the trap. We show that the ground-state bipartite entanglement entropy can be used as an order parameter to characterize this local quantum phase transition.We also study excited eigenstates by calculating the average von Neumann and second Renyi eigenstate entanglement entropies, and compare the results with the thermodynamic entropy and the mutual information of thermal states at the same energy density. While at low temperatures we observe a linear increase of the thermodynamic entropy with temperature at all characteristic densities, the average eigenstate entanglement entropies exhibit a strikingly different behavior as functions of temperature below and above the transition. They are linear in temperature below the transition but exhibit activated behavior above it. Hence, at nonvanishing energy densities above the ground state, the average eigenstate entanglement entropies carry fingerprints of the local quantum phase transition.

[1] Zhang, Vidmar and Rigol, Phys. Rev. A 97, 023605 (2018)

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21 Nov 2017
Jan SkolimowskiZigzag-chain domain walls facilitate metalisation of the Mott insulator on a triangular lattice
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24 Oct 2017
Friedrich KrienConservation in strongly correlated systems - A practical viewpoint
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10 Oct 2017
Denis GolezManipulation of band gap upon photoexcitation of an excitonic insulator
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27 Jun 2017
Ana VranicThermodynamics and electron transport on a triangular lattice - comparison between Lanczos and DMFT
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4 Apr 2017
Rok ZitkoInfinite U Hubbard model in infinite dimensions: transport in the low-T regime
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22 Mar 2017
Markus AichhornStrong Correlations and Spin-Orbit Coupling: From Materials to Models
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7 Mar 2017
Alen HorvatSpin-orbit coupling in multi-orbital impurity models and its relevance for transition metal-oxides
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26 Jan 2017
Daniel BauernfeindFork Tensor Product States - Efficient Three Orbital Real Time DMFT Solver
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20 Jun, 2018 Abroad:
Invited Talk
Jernej F. Kamenik...
19 Jun, 2018 Seminar:
Jun 20: Localization in...
Tilen Čadež...
18 Jun, 2018 Seminar:
Jun 22: Information mea...
Yicheng Zhang...
11 Jun, 2018 Seminar:
Jun 12: Slow quenches i...
Lara Ulčakar...
7 Jun, 2018 Publication:
Tadic, B....
4 Jun, 2018 Seminar:
Jun 5: Validity of dyn...
Robin Steinigeweg...
1 Jun, 2018 Abroad:
Invited Talk
Jernej F. Kamenik...
31 May, 2018 Conference:
Ljubljana Corr18: C...
University of Ljubl...
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