Magnon-magnon entanglement and its quantification via a microwave cavity

AbstractNanocrystalline Ni0.5Zn0.5Fe2O4 thin films have been synthesized with various grain sizes by sol–gel method on polycrystalline silicon substrates. The morphology and microwave absorption properties of the films calcined in the 673–1073 K range were studied by using XRD, AFM, near–field evanescent microwave microscopy, coplanar waveguide and direct microwave heating measurements. All films were uniform without microcracks. The increase of the calcination temperature from 873 to 1073 K and time from 1 to 3h resulted in an increase of the grain size from 12 to 27 nm. The complex permittivity of the Ni-Zn ferrite films was measured in the frequency range of 2–15 GHz. The heating behavior was studied in a multimode microwave cavity at 2.4 GHz. The highest microwave heating rate in the temperature range of 315–355 K was observed in the film close to the critical grain size of 21 nm in diameter marked by the transition from single– to multi–domain structure of nanocrystals in Ni0.5Zn0.5Fe2O4 film and by a maximum in its coercivity.

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Multipartite entanglement in the interaction system between a single-mode microwave cavity field and superconducting charge qubits

Chinese Physics ◽

10.1088/1009-1963/16/6/021 ◽

2007 ◽

Vol 16 (6) ◽

pp. 1615-1618

Author(s):

Shi Zhen-Gang ◽

Chen Xiong-Wen ◽

Zhu Xi-Xiang ◽

Song Ke-Hui

Keyword(s):

Single Mode ◽

Microwave Cavity ◽

Multipartite Entanglement ◽

Cavity Field ◽

Interaction System ◽

Charge Qubits

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Shape Effect on the Temperature Field during Microwave Heating Process

Journal of Food Quality ◽

10.1155/2018/9169875 ◽

2018 ◽

Vol 2018 ◽

pp. 1-24 ◽

Cited By ~ 10

Author(s):

Zhijun Zhang ◽

Tianyi Su ◽

Shiwei Zhang

Keyword(s):

Electromagnetic Field ◽

Heat Conduction ◽

Temperature Distribution ◽

Microwave Cavity ◽

Heating Process ◽

Shape Effect ◽

Power Absorption ◽

Sample Shape ◽

Distribution Uniformity ◽

Microwave Process

Aiming at improving the food quality during microwave process, this article mainly focused on the numerical simulation of shape effect, which was evaluated by microwave power absorption capability and temperature distribution uniformity in a single sample heated in a domestic microwave oven. This article only took the electromagnetic field and heat conduction in solid into consideration. The Maxwell equations were used to calculate the distribution of microwave electromagnetic field distribution in the microwave cavity and samples; then the electromagnetic energy was coupled as the heat source in the heat conduction process in samples. Quantitatively, the power absorption capability and temperature distribution uniformity were, respectively, described by power absorption efficiency (PAE) and the statistical variation of coefficient (COV). In addition, we defined the comprehensive evaluation coefficient (CEC) to describe the usability of a specific sample. In accordance with volume or the wave numbers and penetration numbers in the radial and axial directions of samples, they can be classified into different groups. And according to the PAE, COV, and CEC value and the specific need of microwave process, an optimal sample shape and orientation could be decided.

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The Uncertainty Analysis of Microwave Resonant Cavity System for Wetness Measurement

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.643.176 ◽

2014 ◽

Vol 643 ◽

pp. 176-182

Author(s):

Jun Ke Zhang ◽

Tin Ge ◽

Jing Yu Liu ◽

Ming Li ◽

Xiao Zhe Yan

Keyword(s):

Sampling Error ◽

Resonant Cavity ◽

Water Film ◽

Steam Pressure ◽

Frequency Measurement ◽

Standard Uncertainty ◽

Microwave Cavity ◽

System Uncertainty ◽

Cavity System ◽

Parameters Measurement

Steam pressure and resonant frequency of microwave cavity are important measure parameters of microwave wetness measurement system. The measuring precision of pressure and frequency directly affect the accuracy of wetness measurement. This paper takes different pressure and wetness of steam as example to analyze the parameter uncertainty of measurement relationship and deduces standard uncertainty of wetness measurement. The system comprehensive uncertainty is identified, when the parameters measurement, cavity heat expansion, sampling error, sedimentary water film and so on are considered. The result shows that the system uncertainty is less than 0.004%. The system uncertainty introduced by pressure measurement is small and can be neglected, but the system uncertainty from frequency measurement has a great effect. The precisely measurement of resonance frequency is key to ensure the accuracy of the system.

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