Novotný, J. ; Alber, G. ; Jex, I. (2011)
Asymptotic dynamics of qubit networks under randomly applied controlled unitary transformations.
In: New Journal of Physics, 13 (5)
doi: 10.1088/1367-2630/13/5/053052
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
The asymptotic dynamics of many-qubit quantum systems is investigated under iteratively and randomly applied unitary transformations. For a one-parameter family of unitary transformations, which entangle pairs of qubits, two main theorems are proved. They characterize completely the dependence of the resulting asymptotic dynamics on the topology of the interaction graph that encodes all possible qubit couplings. These theorems exhibit clearly which aspects of an interaction graph are relevant and which ones are irrelevant to the asymptotic dynamics. On the basis of these theorems, the local entropy transport between an open quantum system and its environment are explored for strong non-Markovian couplings and for different sizes of the environment and different interaction topologies. It is shown that although the randomly applied unitary entanglement operations cannot decrease the overall entropy of such a qubit network, a local entropy decrease or ‘cooling’ of subsystems is possible for special classes of interaction topologies.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2011 |
| Autor(en): | Novotný, J. ; Alber, G. ; Jex, I. |
| Art des Eintrags: | Bibliographie |
| Titel: | Asymptotic dynamics of qubit networks under randomly applied controlled unitary transformations |
| Sprache: | Englisch |
| Publikationsjahr: | Mai 2011 |
| Ort: | London |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | New Journal of Physics |
| Jahrgang/Volume einer Zeitschrift: | 13 |
| (Heft-)Nummer: | 5 |
| Kollation: | 27 Seiten |
| DOI: | 10.1088/1367-2630/13/5/053052 |
| URL / URN: | https://iopscience.iop.org/article/10.1088/1367-2630/13/5/05... |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | The asymptotic dynamics of many-qubit quantum systems is investigated under iteratively and randomly applied unitary transformations. For a one-parameter family of unitary transformations, which entangle pairs of qubits, two main theorems are proved. They characterize completely the dependence of the resulting asymptotic dynamics on the topology of the interaction graph that encodes all possible qubit couplings. These theorems exhibit clearly which aspects of an interaction graph are relevant and which ones are irrelevant to the asymptotic dynamics. On the basis of these theorems, the local entropy transport between an open quantum system and its environment are explored for strong non-Markovian couplings and for different sizes of the environment and different interaction topologies. It is shown that although the randomly applied unitary entanglement operations cannot decrease the overall entropy of such a qubit network, a local entropy decrease or ‘cooling’ of subsystems is possible for special classes of interaction topologies. |
| ID-Nummer: | Artikel-ID: 053052 |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Angewandte Physik 05 Fachbereich Physik > Institut für Angewandte Physik > Theoretische Quantenphysik |
| Hinterlegungsdatum: | 16 Feb 2023 12:49 |
| Letzte Änderung: | 07 Mär 2024 10:20 |
| PPN: | 508982375 |
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| Suche nach Titel in: | TUfind oder in Google |
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Asymptotic dynamics of qubit networks under randomly applied controlled unitary transformations. (deposited 05 Mär 2024 10:09)
- Asymptotic dynamics of qubit networks under randomly applied controlled unitary transformations. (deposited 16 Feb 2023 12:49) [Gegenwärtig angezeigt]
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