4 papers
The use of Peres lattices in periodically driven systems
Lukáš Honsa, Jan StÅeleÄek, Jakub Novotný +1
We demonstrate the strength of the method of Peres lattices in periodically driven quantum systems. The method, which has previously been used mostly in stationary systems, enables…
Quantum geometry of connected state manifolds: When diabolic points act as bridges between eigenstate manifolds
Jan StÅeleÄek, Jakub Novotný, Pavel Cejnar
Parametric Hamiltonians often exhibit point-like spectral degeneracies (diabolic points, or conical intersections), which can lead to singularities in the Provost-Vallee metric of…
Tracing complex zeros of the quantum survival amplitude: How the energy distribution controls dynamical phase transitions
Jakub Novotný, Jan StÅeleÄek, Pavel Stránský +1
Motivated by the advance of dynamical quantum phase transitions (DQPTs), we analyze the zeros of the complex-time survival (Loschmidt) amplitude in finite quantum systems and devel…
Excited-state quantum phase transitions in constrained systems
Jakub Novotný, Pavel Stránský, Pavel Cejnar
We extend the standard semiclassical theory of Excited-State Quantum Phase Transitions (ESQPTs), based on a classification of stationary points in the classical Hamiltonian, to con…