[phys4phys] [institut] SCL Seminar: Axel Pelster, Monday 28 September 2026, 14:00 - correction

[Marija Mitrovic Dankulov]

Dear colleagues,

I have a correction of the date. The seminar will be held on Monday, 28 
September 2026 at 14:00 in the "Zvonko Marić" lecture hall of the 
Institute of Physics Belgrade.

Best regards,
Marija

On 2026-09-21 15:01, Marija Mitrovic Dankulov wrote:
> Dear colleagues,
> 
> You are cordially invited to the SCL seminar of the Center for the
> Study of Complex Systems, which will be held on Monday, 26 September
> 2026 at 14:00 in the "Zvonko Marić" lecture hall of the Institute of
> Physics Belgrade. The talk entitled
> 
> Bogoliubov theory of 1D anyons in a lattice
> 
> will be given by Axel Pelster (Physics Department and Research Center
> OPTIMAS, RPTU Kaiserslautern-Landau, Germany). The abstract of the
> talk:
> 
> Anyons of the Hubbard type in 1D interpolate between bosonic and
> fermionic particle statistics. Their exclusion behavior is encoded in
> that of their parent particles, including statistical interactions
> dependent on the connectivity and form of the underlying Hamiltonian.
> Their exchange phase emerge via non-gaugable hopping processes that
> characteristically break spatio-temporal symmetries, away from their
> canonical limits. Both effects originate from density-dependent
> Peierls phases that are essentially non-perturbative. This results in
> a rich phenomenology but also in experimental challenges [1,2] and the
> necessity of a careful theoretical treatment [3,4].
> 
> To this end, we develop a generalized Bogoliubov theory for the
> bosonic version of the anyon-Hubbard model, maintaining periodicity in
> the statistical parameter and incorporating a condensation at finite
> momenta. We investigate the stability of the condensate and find a
> mean-field manifestation of the Pauli principle while transmuting from
> bosons to pseudo-fermions. We regularize characteristic divergences in
> the thermodynamic limit by the maximal momentum resolution of a finite
> periodic lattice. We determine the condensate depletion as well as its
> momentum self-consistently, and with this investigate excitations
> above ground-state as well as their universal parameters. We find a
> good agreement with Luttinger theory at weak coupling.
> 
> 
> References:
> 
> [1] J. Kwan, et al., Realization of one-dimensional anyons with 
> arbitrary
> statistical phase, Science 386, 1055 (2024).
> [2] S. Dhar, et al., Observing anyonization of bosons in a quantum
> gas, Nature 642, 53 (2025).
> [3] M. Bonkhoff, et al., Bosonic continuum theory of one-dimensional
> lattice anyons, Phys. Rev. Lett. 126, 163201 (2021).
> [4] M. Bonkhoff, et al., Anyonic phase transitions in the 1D extended
> Hubbard model with fractional statistics, Phys. Rev. Lett. 135, 036601
> (2025).
> 
> 
> Best regards,
> Marija Mitrović Dankulov

-- 
Marija Mitrovic Dankulov
E-mail: mitrovic at ipb.ac.rs

Scientific Computing Laboratory
Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia