Journal Article

FZJ-2021-04955

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png GHZ-like states in the Qubit-Qudit Rabi model

Shen, Y. ; Marchegiani, G. ; Catelani, G. (Corresponding author)FZJ* ; Amico, L. ; Liu, A. Q. ; Fan, W. ; Kwek, L. C.

2021
SciPost Foundation Amsterdam

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Please use a persistent id in citations: http://hdl.handle.net/2128/29342  doi:10.21468/SciPostPhys.11.6.099

Abstract: We study a Rabi type Hamiltonian system in which a qubit and a d-level quantum system (qudit) are coupled through a common resonator. In the weak and strong coupling limits the spectrum is analysed through suitable perturbative schemes. The analysis show that the presence of the multilevels of the qudit effectively enhance the qubit-qudit interaction. The ground state of the strongly coupled system is found to be of Greenberger-Horne-Zeilinger (GHZ) type. Therefore, despite the qubit-qudit strong coupling, the nature of the specific tripartite entanglement of the GHZ state suppresses the bipartite entanglement. We analyze the system dynamics under quenching and adiabatic switching of the qubit-resonator and qudit-resonator couplings. In the quench case, we found that the non-adiabatic generation of photons in the resonator is enhanced by the number of levels in the qudit. The adiabatic control represents a possible route for preparation of GHZ states. Our analysis provides relevant information for future studies on coherent state transfer in qubit-qudit systems.

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Contributing Institute(s):

1. JARA Institut Quanteninformation (PGI-11)

Research Program(s):

1. 5221 - Advanced Solid-State Qubits and Qubit Systems (POF4-522) (POF4-522)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Essential Science Indicators ; IF >= 5 ; JCR ; Science Citation Index Expanded ; Web of Science Core Collection

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