Quantum theory of light and noise polarization in nonlinear optics

We present a consistent quantum theory of the electromagnetic field in nonlinearly responding causal media, with special emphasis on $\chi^{(2)}$ media. Starting from QED in linearly responding causal media, we develop a method to construct the nonlinear Hamiltonian expressed in terms of the complex nonlinear susceptibility in a quantum mechanically consistent way. In particular we show that the method yields the nonlinear noise polarization, which together with the linear one is responsible for intrinsic quantum decoherence.Comment: 4 pages, no figure

Non-perturbative Interband Response of InSb Driven Off-resonantly by Few-cycle Electromagnetic Transients

Intense multi-THz pulses are used to study the coherent nonlinear response of bulk InSb by means of field-resolved four-wave mixing spectroscopy. At amplitudes above 5 MV/cm the signals show a clear temporal substructure which is unexpected in perturbative nonlinear optics. Simulations based on a two-level quantum system demonstrate that in spite of the strongly off-resonant character of the excitation the high-field pulses drive the interband resonances into a non-perturbative regime of Rabi flopping.Comment: 4 pages, 4 figure

The sudden devotion emotion: kama muta and the cultural practices whose function is to evoke it

When communal sharing relationships (CSRs) suddenly intensify, people experience an emotion that English speakers may label, depending on context, “moved,” “touched,” “heart-warming,” “nostalgia,” “patriotism,” or “rapture” (although sometimes people use each of these terms for other emotions). We call the emotion kama muta (Sanskrit, “moved by love”). Kama muta evokes adaptive motives to devote and commit to the CSRs that are fundamental to social life. It occurs in diverse contexts and appears to be pervasive across cultures and throughout history, while people experience it with reference to its cultural and contextual meanings. Cultures have evolved diverse practices, institutions, roles, narratives, arts, and artifacts whose core function is to evoke kama muta. Kama muta mediates much of human sociality.info:eu-repo/semantics/acceptedVersio

“Kama muta” or ‘being moved by love’: a bootstrapping approach to the ontology and epistemology of an emotion

The emotion that people may label being moved, touched, having a heart-warming experience, rapture, or tender feelings evoked by cuteness has rarely been studied and is incompletely conceptualized. Yet it is pervasive across history, cultures, and contexts, shaping the most fundamental relationships that make up society. It is positive and can be a peak or ecstatic experience. Because no vernacular words consistently or accurately delineate this emotion, we call it kama muta. We posit that it is evoked when communal sharing relationships suddenly intensify. Using ethnological, historical, linguistic, interview, participant observation, survey, diary, and experimental methods, we have confirmed that when people report feeling this emotion they perceive that a relationship has become closer, and they tend to have a warm feeling in the chest, shed tears, and/or get goosebumps. We posit that the disposition to kama muta is an evolved universal, but that it is always culturally shaped and oriented; it must be culturally informed in order to adaptively motivate people to devote and commit themselves to new opportunities for locally propitious communal sharing relationships. Moreover, a great many cultural practices, institutions, roles, narratives, arts and artifacts are specifically adapted to evoke kama muta: that is their function.info:eu-repo/semantics/acceptedVersio

Analysis of tethered balloon, ceilometer and class sounding data taken on San Nicolas Island during the FIRE project

During the FIRE Marine Stratocumulus Program on San Nicolas Island, Colorado State University (CSU) and the British Meteorological Office (BMO) operated separate instrument packages on the NASA tethered balloon. The CSU package contained instrumentation for the measurement of temperature, pressure, humidity, cloud droplet concentration, and long and short wave radiation. Eight research flights, performed between July 7 and July 14, are summarized. An analysis priority to the July 7, 8 and 11 flights was assigned for the purposes of comparing the CSU and BMO data. Results are presented. In addition, CSU operated a laser ceilometer for the determination of cloud base, and a CLASS radiosonde site which launched 69 sondes. Data from all of the above systems are being analyzed

The best loved story of all time: overcoming all obstacles to be reunited, evoking kama muta

info:eu-repo/semantics/submittedVersio

Autocorrelation function of eigenstates in chaotic and mixed systems

We study the autocorrelation function of different types of eigenfunctions in quantum mechanical systems with either chaotic or mixed classical limits. We obtain an expansion of the autocorrelation function in terms of the correlation length. For localized states, like bouncing ball modes or states living on tori, a simple model using only classical input gives good agreement with the exact result. In particular, a prediction for irregular eigenfunctions in mixed systems is derived and tested. For chaotic systems, the expansion of the autocorrelation function can be used to test quantum ergodicity on different length scales.Comment: 30 pages, 12 figures. Some of the pictures are included in low resolution only. For a version with pictures in high resolution see http://www.physik.uni-ulm.de/theo/qc/ or http://www.maths.bris.ac.uk/~maab