TY  - JOUR
AU  - Shen, Yuan
AU  - Marchegiani, Giampiero
AU  - Catelani, Gianluigi
AU  - Amico, Luigi
AU  - Liu, Ai Qun
AU  - Fan, Weijun
AU  - Kwek, Leong Chuan
TI  - GHZ-like states in the Qubit-Qudit Rabi model
JO  - SciPost physics
VL  - 11
IS  - 6
SN  - 2542-4653
CY  - Amsterdam
PB  - SciPost Foundation
M1  - FZJ-2021-04955
SP  - 099
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000727026600001
DO  - DOI:10.21468/SciPostPhys.11.6.099
UR  - https://juser.fz-juelich.de/record/903248
ER  -