183 citations · 569 across the 11 of their papers we have counts for
11 papers
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…
Unitary death of Schrödinger's cat
Pavel Stránský, Pavel Cejnar, Radim Filip
We analyze dynamics of the Rabi model describing interactions of a qubit with a single soft-mode oscillator. We show that the model with a slightly violated parity generates symmet…
Mechanism of dynamical phase transitions: The complex-time survival amplitude
Ángel L. Corps, Pavel Stránský, Pavel Cejnar
Dynamical phase transitions are defined through non-analyticities of the survival probability of an out-of-equilibrium time-evolving state at certain critical times. They ensue fro…
Complex density of continuum states in resonant quantum tunneling
Pavel Stránský, Milan Šindelka, Michal Kloc +1
We introduce a complex-extended continuum level density and apply it to one-dimensional scattering problems involving tunneling through finite-range potentials. We show that the re…
Positive quantum Lyapunov exponents in experimental systems with a regular classical limit
Saúl Pilatowsky-Cameo, Jorge Chávez-Carlos, Miguel A. Bastarrachea-Magnani +4
Quantum chaos refers to signatures of classical chaos found in the quantum domain. Recently, it has become common to equate the exponential behavior of out-of-time order correlator…
Quantum and Classical Lyapunov Exponents in Atom-Field Interaction Systems
Jorge Chávez-Carlos, B. López-del-Carpio, Miguel A. Bastarrachea-Magnani +4
The exponential growth of the out-of-time-ordered correlator (OTOC) has been proposed as a quantum signature of classical chaos. The growth rate is expected to coincide with the cl…