3 papers
quant-ph2026
Tracing complex zeros of the quantum survival amplitude: How the energy distribution controls dynamical phase transitions
Jakub Novotný, Jan Střeleček, 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…
quant-ph2026
Chaos, thermalization and breakdown of quantum-classical correspondence in a collective many-body system
Ángel L. Corps, Sebastián Gómez, Pavel Stránský +2
We investigate thermalization and the quantum-classical correspondence in the collective Bose-Hubbard model, focusing on the four-site case. Our analysis of the classical phase-spa…
quant-ph2025
Creating multicomponent Schrödinger cat states in a coupled qubit-oscillator system
Pavel Stránský, Pavel Cejnar
We present a method for preparing various exotic modifications of Schr{ö}dinger cat states by coupling a semiclassical oscillator to a system of qubits. Varying the number of qubit…