DC pole | Wartość | Język |
dc.contributor.advisor | Dajka, Jerzy | - |
dc.contributor.advisor | Gardas, Bartłomiej | - |
dc.contributor.author | Łobejko, Marcin | - |
dc.date.accessioned | 2018-07-26T08:22:49Z | - |
dc.date.available | 2018-07-26T08:22:49Z | - |
dc.date.issued | 2018 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/5580 | - |
dc.description | Pełny tekst artykułu nr 3, dołączonego do rozprawy, dostępny jest lokalnie w sieci bibliotek Uniwersytetu Śląskiego: http://www.bc.us.edu.pl/publication/16367 | pl_PL |
dc.description.abstract | This dissertation concerns an analysis of obtained theoretical values of temporal correlation
functions in open quantum systems in the context of Leggett-Garg inequalities. The violation of
these inequalities indicates that a system reveals non-classical correlations. A special case of the
temporal correlations, analysed in this work, are used to tests of macrorealism, likewise as an
indicator of the “quantumness” of a system or in order to perform the quantum information
protocols. Despite of the well grounded results on the temporal quantum correlations in isolated
systems, the open systems are still barely explored. The main motivation to study this subject is a
possibility to obtain better models of real physical systems and to develop new methods to control
the amount of the non-classical correlations.
The main research objective is to establish an influence on the amount of the non-classical
correlations in the measured subsystem by a coupling with the environment. In this work, four
distinct physical models of open quantum systems are presented. In the first one there is revealed a
violation of Leggett-Garg inequality in the system weakly coupled to thermal environment where
especially is discussed the process of decoherence and dissipation. The main result is an observation
that, under some conditions, the violation of the inequality is independent of environment properties
like temperature. The second model concerns an analysis of temporal quantum correlations in the
systems that dynamics is governed by the angular momentum operators and driven by classical
white noise. In this case strict analytical results reveal an exponential dumping of the non-classical
correlations as well as a property that such dumping can be less effective for systems with larger
state space. The last but not least two models for which is calculated the Leggett-Garg correlator are
the systems which interact with the environment due to the spin-spin coupling. In this context, a
physical model of atoms from the first group of the periodic table and a model of quantum-classical
hybrids, for which is discussed the semi-classical approach, is proposed. In both examples it is
proven that for “more macroscopic” systems as well as for “classical environments”, it is possible to
observe higher violation of the Leggett-Garg inequality. | pl_PL |
dc.language.iso | pl | pl_PL |
dc.publisher | Katowice : Uniwersytet Śląski | pl_PL |
dc.subject | nierówności Leggetta–Garga | pl_PL |
dc.subject | korelacje nieklasyczne | pl_PL |
dc.subject | kwantowe układy otwarte | pl_PL |
dc.title | Łamanie nierówności Leggetta-Garga w otwartych układach kwantowych | pl_PL |
dc.type | info:eu-repo/semantics/doctoralThesis | pl_PL |
Pojawia się w kolekcji: | Rozprawy doktorskie (WNŚiT)
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