独立单光子源辐射的测量诱导聚焦

Radiation-Induced Dark Counts for Silicon Single-Photon Detectors in Space

Single-photon detectors operating on satellites for use in a quantum communications network can incur large dark count rate increases from the natural radiation environment of space. Displacement damage to the material lattice of a detector from the ionizing radiation can result in a permanent dark count increase in the detector. In this work, we analyze the radiation-induced dark count rate of a silicon single-photon avalanche diode onboard a satellite at different orbiting altitudes, as well as, the additional radiation from a nuclear-disturbed environment caused by a high-altitude nuclear e…

因光子带隙限制而自发产生的发射体-辐射纠缠

Spontaneously induced emitter-radiation entanglement due to confinement to photonic band gap

本文研究嵌入光子带隙晶体中的二能级发射体自发产生的非经典性，发现耦合系统在带边附近呈现增强的纠缠与非经典强度关联，为量子信息处理提供了可靠试验平台。

光子附加相干辐射和热辐射的非经典性

Non-classicality of photon added coherent and thermal radiations

非高斯辐射场的产生和分析是近年来研究的热点。产生这种非高斯的最简单的方法是通过将光子加（减）到高斯场。有趣的是，当光子被添加到经典高斯场时，所得到的态表现出{ \em非经典性}。两种重要的经典高斯辐射场是相干态和热态。在这里，我们研究的非经典特性的状态时，光子添加到他们。这些态的非经典性表现在维格纳函数的负性上。我们还计算出了{ \em纠缠势}，这是最近提出的一种衡量这些态的非经典性的方法。我们的分析表明，光子附加相干态是非经典的所有种子光束强度，其非经典性增加的光子数增加。当加入光子时，热态在所有温度下都表现出非经典性;温度越低，它们的非经典性越高。

黑体辐射的研究：经典光子和二元光子

A study on black-body radiation: classical and binary photons

本文基于经典随机变量对黑体辐射进行了详细的分析。结果表明，混沌辐射场模式的能量（高斯变量）可以唯一地分解为一个离散变量（具有Planck-Bose分布的Planck变量）和一个连续暗变量（具有有限支集的截尾指数分布）之和.普朗克变量一方面被分解为代表能量为2^s*h*nu的二进制光子的二进制变量之和，其中s=0，1，2等。这样，黑体辐射可以被看作是热力学独立的费米子气体的混合物。普朗克变量也可以被分解成一个独立的泊松分量的总和代表经典的光分子的能量m*h*nu与m=1，2，3等这些经典的光子只有类粒子的波动，另一方面，二进制光子有波粒波动的费米子字符。

Damped Casimir radiation and photon correlation measurements

An effective toy model for an ideal one-dimensional nonstationary cavity is taken to be the starting point to derive a fitting markovian master equation for the corresponding leaky cavity. In the regime where the generation of photons via the dynamical Casimir effect is bounded, the master equation thus constructed allows us to investigate the effects of decoherence on the average number of Casimir photons and their quantum fluctuations through the second-order correlation function.

Quantum radiation from a shaken two-level atom in vacuum

We present a non-relativistic theory of quantum radiation generated by shaking a two-level atom in vacuum. Such radiation has the same origin of photon emission in dynamical Casimir effect. By performing a time-dependent "dressing" transformation to the Hamiltonian, we derive an interaction term that governs the radiation. In particular, we show that photon pairs can be generated, not only by shaking the position of the atom, but also by changing the internal states of the atom. As applications of our theory, we calculate the emission rate from an oscillating atom, and the multi-photon state g…

对黑体辐射的解释

An interpretation of the black-body radiation

用与凝聚态物理相似的光子多体波函数重新解释了黑体辐射。这种解释对波粒二象性，以及光子和物质波之间的差异有影响。

黑体辐射中时间光子聚束的测量

Measuring Temporal Photon Bunching in Blackbody Radiation

来自热黑体辐射体（如恒星）的光在足够短的时间尺度上表现出光子聚束行为。然而，与可用的检测器带宽，这种聚束信号是难以直接用于强度干涉测量与天文学中的足够的统计。在这里，我们提出了一种实验技术，以增加在黑体辐射的光子聚束信号通过光谱过滤的光源。我们的测量揭示了强烈的时间光子聚束在光从黑体辐射，包括太阳。这样的滤波技术可能会恢复强度干涉测量作为天文学工具的兴趣。

Photon statistics of radiation in an incoherently pumped three-level cascade system

We study the intensity-intensity correlations of the radiation emitted on probe transition in a three level cascade electromagnetically induced transparency (EIT) scheme. By applying an incoherent pump, we also monitor further changes in the characteristics of the emitted radiation. It is found that application of even a very weak incoherent pump can significantly alter the characteristics of the emitted radiation, even though the EIT characteristics remain unaltered. Our study demonstrates that for certain range of parameter values, the two photon correlation function in the probe transition …

Coherent radiation of photons by particle wave packets

The radiation of photons by electrons is investigated in the framework of quantum electrodynamics up to the second order in the coupling constant $e$. The $N$-particle, coherent, and thermal initial states are considered and the forms of the electron wave packets are taken into account. The explicit expressions for the intensity of radiation and the inclusive probability to record a photon are obtained. It is found that there are three processes in this order of perturbation theory where the electron wave packet radiates coherently and can be regarded as a charged fluid even on integrating ove…

Revisiting Photon Statistics Effects on Multi-photon Ionization

We present a detailed analysis of the effects of photon statistics on multi-photon ionization. Through a detailed study of the role of intermediate states, we evaluate the conditions under which the premise of non-resonant processes is valid. The limitations of its validity are manifested in the dependence of the process on the stochastic properties of the radiation and found to be quite sensitive to the intensity. The results are quantified through detailed calculations for coherent, chaotic and squeezed vacuum radiation. Their significance in the context of recent developments in radiation s…

Photon statistics of radiation emitted by two quantum wells embedded in two optically coupled semiconductor microcavities

We study theoretically the photon statistics of the field emitted from two optically coupled semiconductor microcavities each containing a quantum well. The emission is determined by the interplay between exciton-photon coupling in each quantum well and internal interaction between the two optically coupled microcavities. A high degree of coherent control and tunability via the quantum well-cavity coupling strength and photon tunneling over the photon statistics of the transmitted field can be achieved. We demonstrate that the optical property of radiation emitted by one quantum well can be co…

Formation and stimulated photodissociation of metastable molecules with emission of photon at the collision of two atoms in a laser radiation field

The Formation of metastable molecules (Feshbach resonances) at the collision of two atoms and subsequent stimulated transition to a lower unbound electronic molecular state, with emission of a photon of the laser radiation has been investigated. This can develop, in particular, for $Rb_2$ molecules due to resonance scattering of two $Rb$ atoms. The considered process is a basis for the creation of excimer lasers. Expressions for the cross sections of elastic and inelastic resonance scattering and the intensity of the stimulated emission of the photons have been obtained.

残余光子气体的Vavilov-Cherenkov辐射

The Vavilov-Cherenkov radiation by relict photon gas

基于新的量子Vavilov-Cherenkov辐射（VCR）理论（PRL，2004），它陈述了当宇宙射线的相对论粒子以γ \geq γ_th \cong 2 \cdot 10 ^10穿过时，残余光子气体在现代新VCR效应中实现阈值的可能性，其中γ ^2 = 1 - \frac{V^2}{C^2}，v是粒子的速度，c是真空中的光速。

Photon vortex generation in quantum level by high-order harmonic synchrotron radiations from spiral moving electrons in magnetic fields

We explore photon vortex generation in synchrotron radiations from a spiral moving electron under a uniform magnetic field along z-axis using Landau quantization. The obtained wave-function of the photon vortecies is the eigen-state of the z-component of the total angular momentum (zTAM). In m-th harmonic radiations, individual photons are the eigen-state of zTAM of m. This is consistent with previous studies. Using the presently obtained wave-functions we calculate the decay widths and the energy spectra under extremely strong magnetic fields of 10^12 - 10^13 G, which are observed in astrophy…