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Digital quantum simulation of thermal observables using a global quench

Pavlova, A. 1
1 Institut für QuantenMaterialien und Technologien (IQMT), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Thermal state preparation is essential for quantum simulation since it describes the natural equilibrium states of matter. We discuss the thermalization protocol based on a global quench that induces all-to-all random interaction within a few-qubit system. The interaction constants are drawn from complex Gaussian distribution. Running the protocol multiple times and averaging the results over realizations of the interaction constants leads to thermal observables. We implement our protocol on the IBM quantum computer for a four-qubit system. Using circuit recompilation, we restore the thermal observables predicted by the exact dynamics evaluated on a classical computer. We show thermal occupation probabilities for the sixteen states with temperature controlled by the variance of the interaction constants and duration of the quench protocol.


Zugehörige Institution(en) am KIT Institut für QuantenMaterialien und Technologien (IQMT)
Publikationstyp Vortrag
Publikationsdatum 21.03.2024
Sprache Englisch
Identifikator KITopen-ID: 1000169353
HGF-Programm 47.11.02 (POF IV, LK 01) Emergent Quantum Phenomena
Veranstaltung 87. Jahrestagung der DPG und DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM 2024), Berlin, Deutschland, 17.03.2024 – 22.03.2024
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