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Title: GHZ-like states in the Qubit-Qudit Rabi model
Authors: Shen, Yuan
Marchegiani, Giampiero
Catelani, Gianluigi
Amico, Luigi
Liu, Ai Qun
Fan, Weijun
Kwek, Leong Chuan
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2021
Source: Shen, Y., Marchegiani, G., Catelani, G., Amico, L., Liu, A. Q., Fan, W. & Kwek, L. C. (2021). GHZ-like states in the Qubit-Qudit Rabi model. SciPost Physics, 11(6).
Project: NRF-CRP19-2017-01
Journal: SciPost Physics
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.
ISSN: 2542-4653
DOI: 10.21468/SCIPOSTPHYS.11.6.099
Schools: School of Electrical and Electronic Engineering 
National Institute of Education 
Organisations: Centre for Quantum Technologies, NUS
Research Centres: MajuLab, CNRS-UNS-NUS-NTU International Joint Research Unit UMI 3654
Rights: Copyright Y. Shen et al. This work is licensed under the Creative Commons Attribution 4.0 International License. Published by the SciPost Foundation.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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