Entangling two Dicke states in a periodic modulated quantum system
- URL: http://arxiv.org/abs/2312.15568v1
- Date: Mon, 25 Dec 2023 00:23:26 GMT
- Title: Entangling two Dicke states in a periodic modulated quantum system
- Authors: Wuji Zhang, Ruifang Wu, Chunfang Sun, Chunfeng Wu and Gangcheng Wang
- Abstract summary: We propose a theoretical approach for entangling two Dicke states in a periodic quantum system.
We derive an effective Hamiltonian whose energy levels depend nonlinearly on the excitation number of each qubit ensemble.
We propose a scheme of creating magnon NOON states through frequency modulation and study the influence of decoherence on the fidelity of target states.
- Score: 3.09988520562118
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We propose a theoretical approach for entangling two Dicke states in a
periodic modulated quantum system. By considering two qubit ensembles that are
nonuniformly coupled to a common resonator, we can derive an effective
Hamiltonian whose energy levels depend nonlinearly on the excitation number of
each qubit ensemble. More simplified effective Hamiltonian can be obtained by
selecting appropriate driving parameters and initial state. Based on the
dynamic evolution of the effective Hamiltonian, we can selectively achieve
Dicke state transitions and generate entangled Dicke states controllably. For a
special case, we can obtain ensemble-ensemble entangled states by performing a
projective even-odd cat measurement. By implementing Gaussian soft temporal
modulation, we can effectively suppress off-resonant contributions in the
interaction and enhance the fidelity of target states. Furthermore, by
utilizing the Holstein-Primakoff transformation, we study the
resonator-ensemble coupling system in the thermodynamic limit and investigate
the generation of entangled magnon states. Additionally, we propose a scheme of
creating magnon NOON states through frequency modulation and study the
influence of decoherence on the fidelity of target states.
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