Linear and non-linear response phenomena of molecular systems
... the same type of perturbation, but this does not have to be the case, we might as well look at the magnetic field induced by an electric field or other kind of mixed responses. It is important to notice that, from the theoretical point of view we do not make a distinction between applied and observe ...
... the same type of perturbation, but this does not have to be the case, we might as well look at the magnetic field induced by an electric field or other kind of mixed responses. It is important to notice that, from the theoretical point of view we do not make a distinction between applied and observe ...
PERIMETER INSTITUTE L`INSTITUT PERIMETER
... sight seem abstract and somewhat remote from the real world, we hope that you will see in these pages that here at PI, we still live by the maxim that nature and experiment are a theorist’s best guide. One of Perimeter’s unique features is its group working on quantum foundations. Rob Spekkens and L ...
... sight seem abstract and somewhat remote from the real world, we hope that you will see in these pages that here at PI, we still live by the maxim that nature and experiment are a theorist’s best guide. One of Perimeter’s unique features is its group working on quantum foundations. Rob Spekkens and L ...
inelastic collisions in cold dipolar gases - UKnowledge
... parity, and the collision of two such dipoles can be solved entirely analytically in the energy range of interest. Cross sections and rate constants are found to satisfy simple, universal formulas. In contrast, for molecules in a Σ electronic ground state, the static electric field induces a dipole ...
... parity, and the collision of two such dipoles can be solved entirely analytically in the energy range of interest. Cross sections and rate constants are found to satisfy simple, universal formulas. In contrast, for molecules in a Σ electronic ground state, the static electric field induces a dipole ...
Double-Soft Limits of Gluons and Gravitons
... a soft and a hard contribution which makes it an interesting topic of study. As was already noticed in the early days of quantum field theory [1, 2], the emission of a single soft gluon or graviton yields a singular soft function linearly divergent in the soft momentum. There is also universal behav ...
... a soft and a hard contribution which makes it an interesting topic of study. As was already noticed in the early days of quantum field theory [1, 2], the emission of a single soft gluon or graviton yields a singular soft function linearly divergent in the soft momentum. There is also universal behav ...
Elec-‐ph. and ph.-‐ph. coupling in semiconductors and bismuth
... Jelena SJAKSTE, Nathalie VAST, Matteo CALANDRA, Francesco MAURI ...
... Jelena SJAKSTE, Nathalie VAST, Matteo CALANDRA, Francesco MAURI ...
Introduction to Classical Field Theory
... and methodology of classical field theory. The other field theories that are important (e.g., Dirac, Yang-Mills, Klein-Gordon) typically arise, physically speaking, not as classical field theories but as quantum field theories, and it is usually in a course in quantum field theory that these other ...
... and methodology of classical field theory. The other field theories that are important (e.g., Dirac, Yang-Mills, Klein-Gordon) typically arise, physically speaking, not as classical field theories but as quantum field theories, and it is usually in a course in quantum field theory that these other ...
Density instabilities in multi-layer dipolar Fermi gases
... the RPA as a mean field theory, adducing some successful (or less) example of its results and a critique about its limits. Then, by mean of the stiffness theorem, we introduce the local field factor, and explain by the very same words of the STLS scheme authors, providing a comparison with other app ...
... the RPA as a mean field theory, adducing some successful (or less) example of its results and a critique about its limits. Then, by mean of the stiffness theorem, we introduce the local field factor, and explain by the very same words of the STLS scheme authors, providing a comparison with other app ...
Coherent control of photocurrents in graphene and carbon nanotubes
... provide directional control of a photocurrent along the tube axis5 and even suggests a novel method for biasing the diffusion of ionic species which intercalate within the nanotubes. In this paper, we study the excitations that lead to this effect both for graphene sheets and for carbon nanotubes. I ...
... provide directional control of a photocurrent along the tube axis5 and even suggests a novel method for biasing the diffusion of ionic species which intercalate within the nanotubes. In this paper, we study the excitations that lead to this effect both for graphene sheets and for carbon nanotubes. I ...
Long distance coupling of a quantum mechanical oscillator to the
... mechanical oscillator to the maximal trap frequency achievable in optical lattices, that is, to the sub-MHz regime. Secondly, while motional states of individual atoms in optical lattices are under complete control, a similar level of quantum control over the center-of-mass motion of atomic ensemble ...
... mechanical oscillator to the maximal trap frequency achievable in optical lattices, that is, to the sub-MHz regime. Secondly, while motional states of individual atoms in optical lattices are under complete control, a similar level of quantum control over the center-of-mass motion of atomic ensemble ...
Application of the Green`s functions method to the study of the
... excitations in crystalline semiconductors with electronic states that are to some extent localized, which has emerged from these efforts, can be considered rather well established by this time. Objective of this paper is to give a pedagogical review of the theoretical framework underlying the calcul ...
... excitations in crystalline semiconductors with electronic states that are to some extent localized, which has emerged from these efforts, can be considered rather well established by this time. Objective of this paper is to give a pedagogical review of the theoretical framework underlying the calcul ...
The development of the quantum-mechanical electron theory of metals
... and Baym, 1980.) One could not simply assume that the number of electrons is much smaller than the number of atoms without contradicting optical results; through an undeciphered mechanism, either arising from interactions or perhaps analogous to Planck's quantization of radiation energy, the electro ...
... and Baym, 1980.) One could not simply assume that the number of electrons is much smaller than the number of atoms without contradicting optical results; through an undeciphered mechanism, either arising from interactions or perhaps analogous to Planck's quantization of radiation energy, the electro ...
Coupling ultracold atoms to mechanical oscillators
... Recent experiments have demonstrated an impressive level of control over micro- and nanomechanical oscillators. One key achievement is the engineering of mechanical modes with extremely low dissipation, providing remarkable isolation from the environment [1, 2, 3]. A second cornerstone is the detect ...
... Recent experiments have demonstrated an impressive level of control over micro- and nanomechanical oscillators. One key achievement is the engineering of mechanical modes with extremely low dissipation, providing remarkable isolation from the environment [1, 2, 3]. A second cornerstone is the detect ...
Langer`s Method for the Calculation of Escape Rates
... anisotropy, referred to as the Stoner-Wohlwarth model [24, 25, 26]. Also, interactions between neighbouring atoms [27, 28] and the presence of external magnetic fields [29, 30, 31] can contribute to the reversal process. Smaller particles are magnetically more unstable than larger particles [32], t ...
... anisotropy, referred to as the Stoner-Wohlwarth model [24, 25, 26]. Also, interactions between neighbouring atoms [27, 28] and the presence of external magnetic fields [29, 30, 31] can contribute to the reversal process. Smaller particles are magnetically more unstable than larger particles [32], t ...
The Physics of Low-energy Electron-Molecule Collisions
... The CO2/N2/He laser operates,as indicated in Fig. I, via radiative decay from a particular low-lying vibrational energylevel of CO2. This levelis populated by energy transfer from a (near-resonant)vibrationally excited stateof N2 and by cascadefrom higher lying vibrational levels of CO2. Therefore, ...
... The CO2/N2/He laser operates,as indicated in Fig. I, via radiative decay from a particular low-lying vibrational energylevel of CO2. This levelis populated by energy transfer from a (near-resonant)vibrationally excited stateof N2 and by cascadefrom higher lying vibrational levels of CO2. Therefore, ...
Range corrections in Proton Halo Nuclei
... such that the photon four-momentum is (0, Q). In this paper, we calculate the charge form factor to NLO, by evaluating the relevant diagrams to this order. At LO there are two loop diagrams, ΓLO (Q), and at NLO a constant tree-level diagram, ΓNLO , enters. We derive and evaluate these diagrams below ...
... such that the photon four-momentum is (0, Q). In this paper, we calculate the charge form factor to NLO, by evaluating the relevant diagrams to this order. At LO there are two loop diagrams, ΓLO (Q), and at NLO a constant tree-level diagram, ΓNLO , enters. We derive and evaluate these diagrams below ...
Electronic Energy Transfer in Molecular Crystals
... In the last ten years, a n umber of reviews of properties of molecular crystals have appeared in this series (1, 2, 3). The spectral properties of insulating molecular crystals [which are often described within the framework of the Frenkel theory of excitons (4, 5)] have been reviewed by Hochstrasse ...
... In the last ten years, a n umber of reviews of properties of molecular crystals have appeared in this series (1, 2, 3). The spectral properties of insulating molecular crystals [which are often described within the framework of the Frenkel theory of excitons (4, 5)] have been reviewed by Hochstrasse ...
Hyperbolic Geometrodynamic Warp Drives
... based on the assumption that spacetime is flat. So that all relative motion is based upon the seemingly universal constant c; which stems from the second postulate to the theory of special relativity (in fact early relativity theory earns its name because of the special assertion that the dynamics o ...
... based on the assumption that spacetime is flat. So that all relative motion is based upon the seemingly universal constant c; which stems from the second postulate to the theory of special relativity (in fact early relativity theory earns its name because of the special assertion that the dynamics o ...
The Classical and Quantum Mechanics of Systems with Constraints
... In this paper, we will discuss the classical and quantum mechanics of finite dimensional systems whose orbits are subject to constraints. Before going any further, we should explain what we mean by “constraints”. We will make the definition precise below, but basically a constrained system is one in ...
... In this paper, we will discuss the classical and quantum mechanics of finite dimensional systems whose orbits are subject to constraints. Before going any further, we should explain what we mean by “constraints”. We will make the definition precise below, but basically a constrained system is one in ...
The First Dipole Hyperpolarizability
... The electronic polarizability ααβ (−ωσ ; ω1 ) and first-order hyperpolarizability βαβγ (−ωσ ; ω1 , ω2 ) are also derivatives of the quasienergy and given by d2 Q = −Tr µβ Dα , dFα dFβ d3 Q ...
... The electronic polarizability ααβ (−ωσ ; ω1 ) and first-order hyperpolarizability βαβγ (−ωσ ; ω1 , ω2 ) are also derivatives of the quasienergy and given by d2 Q = −Tr µβ Dα , dFα dFβ d3 Q ...
1 Path Integrals and Their Application to Dissipative Quantum Systems
... coupling to an environment is relevant. In fact, virtually no real system can be considered as completely isolated from its surroundings. Therefore, the phenomena listed in the previous paragraph play a role in many areas of physics and chemistry and a series of methods has been developed to address ...
... coupling to an environment is relevant. In fact, virtually no real system can be considered as completely isolated from its surroundings. Therefore, the phenomena listed in the previous paragraph play a role in many areas of physics and chemistry and a series of methods has been developed to address ...