Chaos generated in a semiconductor microcavity

Hong, Yi; Hou, Xing Wang; Zhao, Rong; Li, Ming Xin; Zhao, Xinyang

doi:10.1103/physreve.107.024220

Cited by 3 publications

(1 citation statement)

References 60 publications

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“…Correspondingly, the mean values of the LC harmonic oscillator and superconducting qubits, and the creation and annihilation operators are replaced by their corresponding complex numbers, such as â a = á ñand b b = á ñ. By using the stochastic differential equation for the positive P representation [51][52][53][54], the c-number α(α † ) and β(β † ) differential evolution equations can be obtained based on zero temperature and the Born approximation as follows:…”

Section: Physical Model and Dynamic Equationmentioning

confidence: 99%

Chaos generation of superconducting quantum bits coupled with LC resonant circuits

Lu,

Wu,

2024

Phys. Scr.

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The dynamics of chaos have been widely used in nonlinear science, such as neural networks, extreme event statistics, and the biophysics of chaos self-organization. Superconducting qubits are artificial atoms based on the Josephson junction structure of nonlinear superconducting devices, offering high design flexibility and ease of coupling and control. In this paper, the generation of chaos through the coupling between superconducting qubits and LC resonant circuits is investigated. By varying the ratio of Josephson energy to charge energy, the coupling coefficient, and the energy of the external driving field, the generation and control of chaos within the system are numerically analyzed. This study provides theoretical support for parameter selection ensuring the confidentiality and fidelity of quantum information transmission based on the chaotic dynamics of superconducting qubits.

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Section: Physical Model and Dynamic Equationmentioning

confidence: 99%

Chaos generation of superconducting quantum bits coupled with LC resonant circuits

Lu,

Wu,

2024

Phys. Scr.

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Entanglement Protection Using Weak Measurement in Non‐Markovian Environment

Yang,

Zhang,

Yin

et al. 2024

Annalen der Physik

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In this work, a scheme to protect quantum entanglement from a non‐Markovian noisy environment is proposed. By applying two quantum weak measurements before and after sending the quantum state into the noisy channel, the quantum state can be “pushed” closer to a decoherence‐free state, reducing decoherence during the time evolution. Then, the second weak measurement can partially retrieve the initial quantum state from the state corrupted by the noisy environment. The study involves a non‐Markovian dynamic equation to examine the impact of the memory effect on the protection scheme's performance. Various factors affecting the residual entanglement and the success probability are analyzed. The results suggest that two measurement strengths shall be chosen approximately in a linear relation, with the best ratio determined by the memory time of the environment. Additionally, it is demonstrated that the memory effect significantly enhances the protection efficiency. Lastly, the scheme's robustness against systematic errors is evaluated.

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Engineering chaos in a four-mirror cavity-optomechanics with mechanical drives

Yasir,

Gao

2024

Results in Physics

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Chaos generated in a semiconductor microcavity

Cited by 3 publications

References 60 publications

Chaos generation of superconducting quantum bits coupled with LC resonant circuits

Chaos generation of superconducting quantum bits coupled with LC resonant circuits

Entanglement Protection Using Weak Measurement in Non‐Markovian Environment

Engineering chaos in a four-mirror cavity-optomechanics with mechanical drives

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