Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Broda, Boguslaw"'
Autor:
Broda, Bogusław
Publikováno v:
Eur. Phys. J. C 84, 413 (2024)
A general structure of unitary evolution (evaporation) of the black hole, respecting causality imposed by the event horizon (semicausality), has been derived and presented in the language of quantum circuits. The resulting consequences for the evolut
Externí odkaz:
http://arxiv.org/abs/2310.04744
Autor:
Broda, Bogusław
Publikováno v:
Phys.Lett.B 820 (2021) 136564
A new simple qubit model of black hole evaporation is proposed. The model operates on four qubits and is defined in terms of quantum gates and a quantum circuit. The chief features of the model include explicit unitarity and (most notably) causality
Externí odkaz:
http://arxiv.org/abs/2104.14901
Autor:
Broda, Bogusław
Publikováno v:
Phys. Rev. D 103, 025022 (2021)
Inspired by a recent model of Osuga and Page, we propose an explicitly unitary fermionic toy model for transferring information from a black hole to the outgoing radiation. The model treats the unitary evolution as a composition of the Hawking pair c
Externí odkaz:
http://arxiv.org/abs/2007.07536
Autor:
Broda, Bogusław
Publikováno v:
Eur. Phys. J. C 80, 418 (2020)
In a recent paper Osuga and Page have presented an explicitly unitary toy qubit transport model for transferring information from a black hole to the outgoing radiation. Following their idea we propose a unitary toy model which involves (fermionic) H
Externí odkaz:
http://arxiv.org/abs/1911.08295
Autor:
Broda, Bogusław
Publikováno v:
International Journal of Modern Physics A, Vol. 35, No. 33 (2020) 2050213 (11 pages)
In the framework of finite-dimensional Fock space models, for a predefined fixed mean number of particles $\bar{n}_{k}$, it is shown that there is a ``large'' multi-dimensional subspace $s_{\bar{n}_{k}}$ of initial pure states, in the space $S$ of al
Externí odkaz:
http://arxiv.org/abs/1810.10431
Autor:
Broda, Bogusław
Publikováno v:
Eur. Phys. J. C (2017) 77: 756
Taking into account time-dependence of the Hawking temperature and finite evaporation time of the black hole, total spectral distributions of the radiant energy and of the number of particles have been explicitly calculated and compared to their temp
Externí odkaz:
http://arxiv.org/abs/1706.04557
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Broda, Bogusław
Publikováno v:
Boson Journal of Modern Physics 2 (2015) 39-42
Standard perturbative quantum gravity formalism is applied to compute the lowest order corrections to the spatially flat cosmological FLRW solution governed by ordinary matter. The presented approach is analogous to the one used to compute quantum co
Externí odkaz:
http://arxiv.org/abs/1509.03155
Autor:
Broda, Bogusław
Publikováno v:
Eur. Phys. J. Plus (2016) 131: 38
A simple circuit implementation of the oracle for Grover's quantum search of a real unstructured classical database is proposed. The oracle contains a kind of quantumly accessible classical memory, which stores the database.
Comment: 7 pages, 3
Comment: 7 pages, 3
Externí odkaz:
http://arxiv.org/abs/1502.04943
Autor:
Broda, Bogusław
Publikováno v:
Phys.Lett.B732:182-185,2014
Perturbative quantum gravity in the framework of the Schwinger-Keldysh formalism is applied to compute lowest-order corrections to the actual expansion of the Universe described in terms of the spatially flat Friedman-Lematre-Robertson-Walker solutio
Externí odkaz:
http://arxiv.org/abs/1310.4308