Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session N41: Noise Characterization, Mitigation and Engineering in Superconducting Qubits
11:30 AM–2:30 PM,
Wednesday, March 16, 2022
Room: McCormick Place W-196C
Sponsoring
Units:
DQI DCMP
Chair: Matthew McEwen, UCSB
Abstract: N41.00013 : Composite bosons in transmon arrays: numerical approach
2:18 PM–2:30 PM
Presenter:
Olli Mansikkamäki
(Univ of Oulu)
Authors:
Olli Mansikkamäki
(Univ of Oulu)
Sami Laine
(Univ of Oulu)
Atte Piltonen
(Univ of Oulu)
Matti Silveri
(Univ of Oulu)
To limit the complexity of modeling such systems, it is often assumed that the local number of bosons never exceeds one, that is, the transmons are considered as two-level systems. In the absence of this limitation, the dynamics are dominated by many-body effects. If multiple bosons are initially stacked onto a single site, being bound together by the on-site interactions, the bosons effectively act as a single composite particle. The composite bosons also experience effective off-site interactions with other composites, individual bosons, and the edges of the arrays.
Here we discuss the many-body effects as seen in numerical simulations of the Bose-Hubbard model within experimentally realistic parameter ranges of transmon arrays and timeframes limited by the onset of decoherence and dissipation.
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