Cheng Da

Prof. Dr. Cheng Da


Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 June 2014 in International Journal of Theoretical Physics
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Journal Article
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CDCheng Da
Cheng Da
QCQian-Fan Chen
Qian-Fan Chen
HFHong-Yi Fan
Hong-Yi Fan

1 August 2013 in Chinese Physics B
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Journal Article
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HFHong-Yi Fan
Hong-Yi Fan
RHRui He
Rui He
CDCheng Da
Cheng Da
ZLZu-Feng Liang
Zu-Feng Liang

We study the optical field's quadrature excitation state Xm|0〉, where X = (a + a†)/√2 is the quadrature operator. We find it is ascribed to the Hermite-polynomial excitation state. For the first time, we determine this state's normalization constant which turns out to be a Laguerre polynomial. This is due to the integration method within the ordered product of operators (IWOP). The normalization for the two-mode quadrature excitation state is also completed by virtue of the entangled state representation.


14 June 2016 in International Journal of Theoretical Physics
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Journal Article
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CDCheng Da
Cheng Da
HFHong-Yi Fan
Hong-Yi Fan

1 June 2024 in AIP Advances
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Journal Article
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CDCheng Da
Cheng Da
HFHong-Yi Fan
Hong-Yi Fan
Physicists have long studied Landau states and energy levels of electrons in a stable magnetic field. However, when the magnetic field dissipates, the question of how Landau states evolve remains unanswered. This study investigates the magnetic dissipative effect from a quantum mechanics perspective. We establish a quantum master equation that describes a dissipative magnetic field. Subsequently, we solve the master equation using an entangled state representation. Consequently, we found that the Landau state evolves into a binomial quantum state (mixed state) when the magnetic field dissipated. This is in sharp contrast to the case where the Landau state becomes a negative binomial state when an additional harmonic oscillator potential is applied. We hope that this finding will be helpful for the evolution of quantized plasma physics.

1 January 2026 in Canadian Journal of Physics
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Journal Article
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CDCheng Da
Cheng Da
HFHong-Yi Fan
Hong-Yi Fan
This study aims to explore the magnetic diffusion effect of Landau states from the perspective of quantum mechanics while the magnetic diffusion often occurs in plasmas physics. By introducing the entangled state representation, we examine how the Landau state diffuses in the presence of magnetic diffusion. We also establish the master equation of the density operator corresponding to magnetic diffusion and solve it, and we find that the Landau state evolves into a Laguerre-polynomial-weighted chaotic state.