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Generating high-order quantum exceptional points in synthetic dimensions
methods for constructing high-order exceptional points (EPs) in dissipative systems introduce a simple and effective method for engineering NHHs with high-order quantum EPs Hamiltonians ...
Optics (including laser optics and quantum optics)
- 2021 •
- Jimp •
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Jimp - Článek v periodiku v databázi Web of Science
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Quantum information dynamics in a high-dimensional parity-time-symmetric system
-order exceptional point. By tracking the coherent, nonunitary evolutionNon-Hermitian systems with parity-time (PT) symmetry give rise to exceptional points (EPs) with exceptional properties that ...
Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
- 2020 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Exceptional points near first- and second-order quantum phase transitions
We study the impact of quantum phase transitions (QPTs) on the distribution of exceptional points (EPs) of the Hamiltonian in the complex-extended parameter domain. Analyzing first-and second-order QPTs in the Lipk...
Physical sciences
- 2018 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Complex symmetric Hamiltonians and exceptional points of order four and five
A systematic elementary linear-algebraic construction of non-Hermitian Hamiltonians H = H(gamma) possessing exceptional points gamma = gamma((EP)) of higher orders is proposed. The implementation of the method leading to EP...
Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
- 2018 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Complex time method for quantum dynamics when an exceptional point is encircled in the parameter space
We revisit the complex time method for the application to quantum dynamics as an exceptional point is encircled in the parameter space of the Hamiltonian. The basic idea of the complex time method is using complex contour i...
Optics (including laser optics and quantum optics)
- 2022 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Confluences of exceptional points and a systematic classification of quantum catastrophes
In the problem of classification of the parameter-controlled quantum phase transitions, attention is turned from the conventional manipulations with the energy-level mergers at exceptional points to the control of mergers o...
Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
- 2022 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Quantum Liouvillian exceptional and diabolical points for bosonic fields with quadratic Hamiltonians: The Heisenberg-Langevin equation approach
by general quadratic Hamiltonians. Quantum Liouvillian exceptional and diabolical points exceptional and diabolical points in infinitely dimensional open quantum systems. exceptional
Optics (including laser optics and quantum optics)
- 2022 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Multiply Degenerate Exceptional Points and Quantum Phase Transitions
The realization of a genuine phase transition in quantum mechanics requires that at least one of the Kato's exceptional-point parameters becomes real. A new family of finite-dimensional and time-parametrized quantum
BE - Teoretická fyzika
- 2015 •
- Jx •
- Link
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Nonclassical light at exceptional points of a quantum PT-symmetric two-mode system
exceptional points that considerably enhance the nonlinear interaction and, thus, described by a quantum quadratic Hamiltonian with additional small Kerr-like nonlinear terms, is analyzed from the point of view of...
Optics (including laser optics and quantum optics)
- 2019 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Anomalous mechanisms of the loss of observability in non-Hermitian quantum models
of quantum phase transitions are interpreted as the points of confluence of several decoupled Kato's exceptional points of equal or different orders. Such a phenomenonVia several toy-model quantu...
Particles and field physics
- 2020 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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