11 papers
Exact dimer ground states of long-range spin chains and ladders
JÄdrzej Wardyn, MiÅosz Panfil
Interacting spin chains and ladders are known to support a plethora of quantum phases with complex ground-state phase diagrams. In this work, we study a large family of such models…
Crossover from generalized to conventional hydrodynamics in nearly integrable systems under relaxation time approximation
Saikat Santra, Maciej Åebek, MiÅosz Panfil
Upon breaking the integrability, the equations of generalized hydrodynamics (GHD) are supplemented by a Boltzmann collision term. Such terms are typically complicated and stem from…
The exact dynamical structure factor of one-dimensional hard rods and its universal random matrix behavior
Oleksandr Gamayun, MiÅosz Panfil, Miłosz Panfil
We obtain an exact analytic expression for the dynamical structure factor of one-dimensional quantum gas of hard rods. Our result is valid for an arbitrary many-body state of the s…
Generalised BBGKY hierarchy for near-integrable dynamics
Leonardo Biagetti, Maciej Lebek, Milosz Panfil +1
We study quantum and classical many-body Hamiltonian systems that combine integrable contact interactions with generic long-range two-body potentials. Starting from an ansatz for t…
Dynamic structure factor of quantum hard rods from exact form-factors
StanisÅaw KiedrzyÅski, Emilia Witkowska, MiÅosz Panfil
We study the quantum hard-rods model and obtain compact analytical expressions for density form factors, and a semi-analytical treatment for dynamic and static structure factors ca…
Burgers equation from non-thermal stationary states in nearly-integrable gases
PaweÅ Lisiak, Maciej Åebek, MiÅosz Panfil
When a gas of particles interacts with much a larger reservoir the density dynamics on large scales is typically governed by diffusion. We study this paradigmatic problem for weakl…