Controlling the non-classical properties of a hybrid Cooper pair box system and an intensity dependent nanomechanical resonator

Valverde, Clodoaldo; Gonçalves, V.G.; Baseia, B.

doi:10.1016/j.physa.2015.11.027

Cited by 15 publications

(3 citation statements)

References 75 publications

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“…The qubit-field interactions are generalized to intensity-dependent qubit-field coupling [ 32 ]. The effects of the intensity-dependent coupling on the non-classical effects have been studied in a hybrid Cooper pair box qubit interacting with a resonator [ 33 , 34 ]. It is used to enhance the non-local correlations of two coupled qubits [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

Entanglement Dynamics Induced by a Squeezed Coherent Cavity Coupled Nonlinearly with a Qubit and Filled with a Kerr-Like Medium

Mohamed

Eleuch

2021

Entropy

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An analytical solution for a master equation describing the dynamics of a qubit interacting with a nonlinear Kerr-like cavity through intensity-dependent coupling is established. A superposition of squeezed coherent states is propped as the initial cavity field. The dynamics of the entangled qubit-cavity states are explored by negativity for different deformed function of the intensity-dependent coupling. We have examined the effects of the Kerr-like nonlinearity and the qubit-cavity detuning as well as the phase cavity damping on the generated entanglement. The intensity-dependent coupling increases the sensitivity of the generated entanglement to the phase-damping. The stability and the strength of the entanglement are controlled by the Kerr-like nonlinearity, the qubit-cavity detuning, and the initial cavity non-classicality. These physical parameters enhance the robustness of the qubit-cavity entanglement against the cavity phase-damping. The high initial cavity non-classicality enhances the robustness of the qubit-cavity entanglement against the phase-damping effect.

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Section: Introductionmentioning

confidence: 99%

Entanglement Dynamics Induced by a Squeezed Coherent Cavity Coupled Nonlinearly with a Qubit and Filled with a Kerr-Like Medium

Mohamed

Eleuch

2021

Entropy

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“…The study of organic materials exhibiting nonlinear optical properties has been of great interest in the recent years, partly due to the ease handlingof these compounds as compared with inorganic materials.Organic materials with large third-order nonlinear optical (NLO) properties are promising for several applications in photonic technologies [1,6,7,14,17,30,31]. Triazole and its derivatives, as the 1, 2, 3-triazole, have a simple structure exhibiting interesting nonlinear optical properties [1,5,28] and in addition present a number of functionalities in the fight against pathologies, such as antimycotic [12], antiviral [15], anticonvulsant [8], antidepressant [26], anti-inflammatory [16], antifungal [9] and analgesic [22].…”

Section: Introductionmentioning

confidence: 99%

PCM-DFT Investigation on the Linear and Nonlinear Optical Properties of Two Triazole Derivatives in Different Solvents

Ribeiro

Murga

Rezende

et al. 2021

Jour. Atom. Mol. Conden. Matt. Nano Physics

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This effort was performed to investigate the linear and nonlinear optical (NLO) properties of two 1,2,3-triazole derivatives in several solvent media and in gas-phase at PCM/DFT/CAM-B3LYP/6-311+G(d) level of theory. The static and dynamic NLO parameters as the total dipole moment, the average linear polarizability, the Hyper-Rayleigh Scattering (HRS) first hyperpolarizability, and the average second hyperpolarizabilityare calculated as function of static dielectric constant of the solvents. The computational linear and nonlinear optical studies revealed that both the triazoles derivatives are promising materials for NLO applications.

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“…后来, Ng等 [31] 利用幺正变换解析求解了具有反旋波项的B-S模型. 然而, 同双光子耦合方式类似 [32,33] , 依赖强度B-S模型也会遭遇相同的能谱塌缩现象, 即B-S模型只有在耦合常数小于某一临界值时才有定义 [31,33] 且反旋波项不会改变这种性质, 只是减小了这个临界值 [34] . 2016年, Valverde等 [35] 建议了用库珀对箱与纳米机械共振器间的相互作用来模拟依赖强度B-S模型的方案, 这为依赖强度B-S模型的实验实现提供了一条可能途径.…”

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Charging performance of quantum batteries based on intensity-dependent Dicke model

Huang,

He,

Chen

2023

Acta Phys. Sin.

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Recently, quantum battery based on various physical models from quantum optics model to spin model and its enhancement of charging performance have attracted increasing interest. It has demonstrated that quantum entanglement is beneficial for the speedup of work extraction. In this paper, the charging performance of the field intensity-dependent Dicke model (also called intensity-dependent Dicke model) quantum battery consisting of N qubits collectively interacting with a single mode cavity is investigated by an exact diagonalization approach. The considered intensity-dependent Dicke model is a generalized Dicke model with a nonlinear-coupling fashion and different weights of energy conserved and non-conserved terms. Firstly, we consider the influence of energy non-conserved term (also called anti-rotating wave term) on the maximum stored energy and maximum charging power in quantum batteries. It is shown that the maximum stored energy is not very sensitive to the increase of the weight of energy non-conserved term, but the maximum charging power will undergo a significant change with the increase of the weight of energy non-conserved term. We also show that the maximum charging power monotonically increases the coupling constant between qubits and cavity, but the maximum stored energy is not monotonic relation with the increase of coupling constant. Further, we examine in detail the characteristics of the maximum stored energy, charging time, energy quantum fluctuation and maximum charging power in the quantum battery under the same weight between energy conserved and non-conserved terms. By comparing the charging performance of quantum batteries based on single photon and two-photon Dicke models, it is shown that the performances both the charging times and maximum charging power of the intensity-dependent Dicke quantum battery is better than that of single-photon Dicke quantum battery, but is weaker than that of two-photon Dicke quantum battery. Of particular interest is, we find that the quantum advantage of maximum charging power for the superlinear scaling relation with large quantum cell numbers in the both intensity-dependent and two-photon Dicke quantum batteries are the same, namely $P_{max}^{ID} \propto N^2$ and $P_{max}^{2ph} \propto N^2$, which is consistent with the upper bound given by the paper (Gyhm J, Šafrǎnek D, Rosa D 2022 Phys. Rev. Lett. 128 140501). It is worth to mention that Dou et al. (Dou F Q, Zhou H, Sun J A 2022 Phys. Rev. A 106 032212) shown that the quantum advantage of maximum charging power in the quantum battery based on cavity Heisenberg-spin-chain model can get Pmax ∝ N2. Therefore, this study on the charging performance based on the intensity-dependent Dicke quantum battery may provide an alternative scheme for further research on quantum battery.

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Controlling the non-classical properties of a hybrid Cooper pair box system and an intensity dependent nanomechanical resonator

Cited by 15 publications

References 75 publications

Entanglement Dynamics Induced by a Squeezed Coherent Cavity Coupled Nonlinearly with a Qubit and Filled with a Kerr-Like Medium

Entanglement Dynamics Induced by a Squeezed Coherent Cavity Coupled Nonlinearly with a Qubit and Filled with a Kerr-Like Medium

PCM-DFT Investigation on the Linear and Nonlinear Optical Properties of Two Triazole Derivatives in Different Solvents

Charging performance of quantum batteries based on intensity-dependent Dicke model

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