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arXiv 1204.3603physics.opticsgr-qc
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强laser脉冲量子真空辐射中色散效应的运动学研究

Kinematic study of the effect of dispersion in quantum vacuum emission from strong laser pulses

Stefano Finazzi, Iacopo Carusotto

摘要:

强光脉冲在非线性介质中传播会引起局部折射率的有效变化。通过对脉冲速度的适当调节,脉冲的前沿和后沿被预测为在无色散介质的极限下表现为类似的黑白视界。在本文中,我们研究了一个更现实的情况下,介质的频率色散是充分考虑。只要在同动系中出现具有负模的正频率模,量子真空辐射的自发发射将与视界的存在无关。最后,我们调查的运动学约束的排放,我们表明,观察霍金发射的最佳方向形成一个狭窄的角度与脉冲的传播方向。

英文摘要:

A strong light pulse propagating in a nonlinear medium causes an effective change in the local refractive index. With a suitable tuning of the pulse velocity, the leading and trailing edge of the pulse were predicted to behave as analogue black and white horizons in the limit of a dispersionless medium. In this paper, we study a more realistic situation where the frequency dispersion of the medium is fully taken into account. As soon as positive frequency modes with negative norm are present in the comoving frame, spontaneous emission of quantum vacuum radiation is expected to arise independently of the presence of horizons. We finally investigate the kinematic constraints put on the emission and we show that the optimal directions to observe Hawking-like emission form a narrow angle with the direction of propagation of the pulse.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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