2/29/2024 0 Comments Intensity light equationHigh harmonic generation and periodic level crossings. Radiation emitted by a resonantly driven hydrogen atom. High harmonic generation in a gas-filled hollow-core photonic crystal fiber. Indefinite-mean pareto photon distribution from amplified quantum noise. Properties of bright squeezed vacuum at increasing brightness. Raman-free, noble-gas-filled photonic-crystal fiber source for ultrafast, very bright twin-beam squeezed vacuum. Bright squeezed-vacuum source with 1.1 spatial mode. Enhanced two-photon excited fluorescence from imaging agents using true thermal light. Jechow, A., Seefeldt, M., Kurzke, H., Heuer, A. Superbunched bright squeezed vacuum state. Photon correlation effects in second harmonic generation. Theory of high-harmonic generation by low-frequency laser fields. Plasma perspective on strong field multiphoton ionization. Observation of a train of attosecond pulses from high harmonic generation. Topological strong-field physics on sub-laser-cycle timescale. F., Jiménez-Galán, Amorim, B., Smirnova, O. Measurement of the Berry curvature of solids using high-harmonic spectroscopy. Background-free measurement of ring currents by symmetry-breaking high-harmonic spectroscopy. Chiral high-harmonic generation and spectroscopy on solid surfaces using polarization-tailored strong fields. Synthetic chiral light for efficient control of chiral light–matter interaction. Ultrasensitive chiral spectroscopy by dynamical symmetry breaking in high harmonic generation. Probing polar molecules with high harmonic spectroscopy. Bicircular high-harmonic spectroscopy reveals dynamical symmetries of atoms and molecules. Nanoscale magnetic imaging using circularly polarized high-harmonic radiation. Observation of high-order harmonic generation in a bulk crystal. Extreme-ultraviolet high-harmonic generation in liquids. Multiple-harmonic conversion of 1064 nm radiation in rare gases. Studies of multiphoton production of vacuum-ultraviolet radiation in the rare gases. We develop the theory of extreme nonlinear optics driven by squeezed light, and more generally by arbitrary quantum states of light, introducing the quantum state of the driving field as a degree of freedom. Shaping the quantum state of light thus enables the production of far higher harmonics. While coherent and Fock light states induce the established HHG cutoff law, thermal and squeezed states substantially surpass it, extending the cutoff compared with a coherent light state of the same intensity. Here we show that the defining spectral characteristics of HHG, such as the plateau and cutoff, are sensitive to the quantum state of light. However, the role of the quantum state of light in non-perturbative interactions of intense light with matter has remained unexplored. So far, HHG has always been generated by intense laser pulses that are well described as a classical electromagnetic field. Earthquakes spread out, so they do less damage the farther they get from the source.High-harmonic generation (HHG) is an extreme nonlinear process in which intense pulses of light drive matter to emit high harmonics of the driving frequency, reaching the extreme ultraviolet and X-ray spectral ranges. Sunlight, for example, can be focused to burn wood. Waves can also be concentrated or spread out. For example, the longer deep-heat ultrasound is applied, the more energy it transfers. The energy effects of a wave depend on time as well as amplitude. In fact, a wave’s energy is directly proportional to its amplitude squared because Because work \(W\) is related to force multiplied by distance (\(F_x\)) and energy is put into the wave by the work done to create it, the energy in a wave is related to amplitude. The larger the displacement \(x\) the larger the force \(F = kx\) needed to create it. More quantitatively, a wave is a displacement that is resisted by a restoring force. Large ocean breakers churn up the shore more than small ones. Loud sounds have higher pressure amplitudes and come from larger-amplitude source vibrations than soft sounds. Large-amplitude earthquakes produce large ground displacements. The amount of energy in a wave is related to its amplitude. (credit: Petty Officer 2nd Class Candice Villarreal, U.S. The Richter scale rating of earthquakes is related to both their amplitude and the energy they carry. \): The destructive effect of an earthquake is palpable evidence of the energy carried in these waves.
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