Institute of Plasma Physics - project detail 00252

Observations of exceptional points in atomic physics using XUV laser pulses
Project ID:	GA20-21179S
Provider:	Czech Science Foundation
Period:	Jan 01, 2020 - Dec 31, 2022
Recipient -- coordinator:	Institute of Physics of the CAS, v. v. i. -- Mgr. Petra Ruth Kaprálová, Ph.D.
Co-recepient(s) / PI(s):	Institute of Plasma Physics, Czech Academy of Sciences, Prague -- Ing. Miroslav Krůs, Ph.D.
Co-investigators from IPP	M. Kozlová, M. Šindelka, D. Mašlárová, , D. Grund
Aims of the project: This interdisciplinary quantum physics project studies fundamental atomic quantum processes via from-femtosecond-to-picosecond XUV laser pulses coupled to atomic systems. It sets out the ambitious goal of the experimental observation of the so called exceptional points in atomic physics; nowadays, the exceptional points represent hot topic in experimental quantum physics with 6 Nature papers in last several years. Such points are encountered in the parameter space of non-Hermitian quantum Hamiltonians. In the past decade it has been shown theoretically that the exceptional points play an important role in non-Hermitian physics from optics through atomic to nuclear physics, in quantum phase transitions and quantum chaos. Within this project we also expect, from experimental and instrumental viewpoint, the contribution to an unprecedented stabilization (deep cooling) of a broadband laser oscillator and even the whole amplification chain for the very accurate measurement necessary for resolving the fingerprints of exceptional points.
Results:
Šindelka M., Stránský P., Cejnar P.: Equations of motion governing the dynamics of the exceptional points of parameterically dependent nonhermitian Hamiltonians. Journal of Physics A-Mathematical and Theoretical 56 [14] (2023) č. článku 145201. [ Abstract ] [ Link ]
Moiseyev N., Šindelka M.: Tuning quantum-classical correspondence for atomic and molecular systems in a cavity. Journal of Physics A-Mathematical and Theoretical 55 [22] (2022) č. článku 224014. [ Abstract ] [ Link ]
Kaprálová-Žďánská P., Šindelka M., Moiseyev N.: Coalescence of two branch points in complex time marks the end of rapid adiabatic passage and the start of Rabi oscillations. Journal of Physics A-Mathematical and Theoretical 55 [28] (2022) č. článku 284001. [ Abstract ] [ Link ]
Uhlířová T., Zamastil J., Benda J.: Calculation of atomic integrals between relativistic functions by means of algebraic methods. Computer Physics Communications 280 [November] (2022) č. článku 108490. [ Abstract ] [ Link ]
Moiseyev N., Vendrell O., Cederbaum L. S., Šindelka M.: Polariton entering a continuum: Giant diffuse polaritonic resonance. Physical Review A 106 [5] (2022) č. článku L051101. [ Abstract ] [ Link ]
Moiseyev N., Šindelka M.: Transfer of information through waveguides near an exceptional point. Physical Review A 103 [3] (2021) č. článku 033518. [ Abstract ] [ Link ]
Stránský P., Šindelka M., Cejnar P.: Continuum analogs of excited-state quantum phase transitions. Physical Review A 103 [6] (2021) č. článku 062207. [ Abstract ] [ Link ]
Šindelka M., Ben-Asher A., Moiseyev N.: Acceleration-gauge Hamiltonian for a laser-driven particle with a position-dependent mass. Physical Review A 103 [5] (2021) č. článku 053117. [ Abstract ] [ Link ]
Ben-Asher A., Šimsa D., Uhlířová T., Šindelka M., Moiseyev N.: Laser control of resonance tunneling via an exceptional point. Physical Review Letters 124 [25] (2020) 1-6, č. článku 253202. [ Abstract ] [ Link ]
Stránský P., Šindelka M., Kloc M., Cejnar P.: Complex Density of Continuum States in Resonant Quantum Tunneling. Physical Review Letters 125 [2] (2020) č. článku 020401. [ Abstract ] [ Link ]