Photon‐Assisted Landau Zener Transitions in a Tunable Driven Rabi Dimer Coupled to a Micromechanical Resonator
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Published:2023-09-27
Issue:11
Volume:6
Page:
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ISSN:2511-9044
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Container-title:Advanced Quantum Technologies
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language:en
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Short-container-title:Adv Quantum Tech
Author:
Melvin Daniel1ORCID,
Zheng Fulu2,
Sun Kewei3,
Tan Zhengjie4,
Zhao Yang1ORCID
Affiliation:
1. Division of Materials Science Nanyang Technological University Singapore 639798 Singapore
2. Bremen Center for Computational Materials Science University of Bremen 28359 Bremen Germany
3. School of Science Hangzhou Dianzi University Hangzhou 310018 China
4. School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore
Abstract
AbstractEmploying the multiple Davydov D2 Ansätze with the time‐dependent variational principle, photon‐assisted Landau–Zener (LZ) transitions and qubit manipulation in a hybrid quantum electrodynamics device have been investigated. Modeled as a Rabi dimer, the device comprises of two interacting transmission‐line resonators, each coupled to a qubit. The qubits, driven by independent harmonic fields, are further modulated by a micromechanical resonator mimicked by a phonon mode. The impacts of two independent driving fields on the qubit dynamics are carefully examined. The energy diagram of the system and the photon number mobilization on the resonators are analyzed to explain the behavior of the LZ transitions and qubit dynamics while taking into account the influence of the single phonon mode. Results show that low phonon frequencies can alter the qubit dynamics, particularly in the absence of the driving fields, and a strong phonon coupling strength can significantly perturb the qubit dynamics, thanks to a high influx of phonon energy. Notably, only the photon frequency affects the oscillation frequency of qubit polarization. This study unveils the imperative roles that photons and phonons play in the Rabi dimer model.
Funder
Ministry of Education - Singapore
Nanyang Technological University
Subject
Electrical and Electronic Engineering,Computational Theory and Mathematics,Condensed Matter Physics,Mathematical Physics,Nuclear and High Energy Physics,Electronic, Optical and Magnetic Materials,Statistical and Nonlinear Physics