J. Foot - Atomic Physics
... ideas, including Einstein’s treatment of the interaction of atoms with radiation, and a classical treatment of the Zeeman effect. These methods, developed before the advent of the Schrödinger equation, remain useful as an intuitive way of thinking about atomic structure and transitions between the e ...
... ideas, including Einstein’s treatment of the interaction of atoms with radiation, and a classical treatment of the Zeeman effect. These methods, developed before the advent of the Schrödinger equation, remain useful as an intuitive way of thinking about atomic structure and transitions between the e ...
Spin Squeezing, Entanglement and Quantum Metrology
... spin squeezing might also involve states that are not minimal uncertainty states. One example is the “one axis twisting" scheme proposed in [1], which we use in the experiments described in the last chapter of this thesis. For these states, as for experimentally very important non-pure quantum state ...
... spin squeezing might also involve states that are not minimal uncertainty states. One example is the “one axis twisting" scheme proposed in [1], which we use in the experiments described in the last chapter of this thesis. For these states, as for experimentally very important non-pure quantum state ...
Recent developments in transport phenomena in Weyl semimetals
... recalls that in reality, Weyl nodes always come in pairs of opposite chiralities and the total current j + + j − is therefore conserved. In fact, the requirement of current conservation is an equally good argument for why the total chirality of the Weyl nodes must vanish. Classically, currents are a ...
... recalls that in reality, Weyl nodes always come in pairs of opposite chiralities and the total current j + + j − is therefore conserved. In fact, the requirement of current conservation is an equally good argument for why the total chirality of the Weyl nodes must vanish. Classically, currents are a ...
Linear and non-linear response phenomena of molecular systems
... that we look at. For example, in an optical absorption experiment, we apply light (the external perturbation) and we look at the light that comes back from the system (the response). In this particular case both correspond to the same type of perturbation, but this does not have to be the case, we m ...
... that we look at. For example, in an optical absorption experiment, we apply light (the external perturbation) and we look at the light that comes back from the system (the response). In this particular case both correspond to the same type of perturbation, but this does not have to be the case, we m ...
The general theory of first-order spatio-temporal
... we investigate all possible coupling effects in the various domains, and we derive analytical expressions that, not only properly describe them, but also yield explicit relations between different effects. We consider beams that are Gaussian in the transverse spatial (x) domain and hence also in its ...
... we investigate all possible coupling effects in the various domains, and we derive analytical expressions that, not only properly describe them, but also yield explicit relations between different effects. We consider beams that are Gaussian in the transverse spatial (x) domain and hence also in its ...
On Exotic Orders in Stongly Correlated Systems
... 6 years, I can’t resist evoking one of my favorite quotes from J.R.R. Tolkien, who reminds us: “Not all who wander are lost”. Indeed, the most rewarding part of assembling what follows was to see, in retrospect, the paths connecting the different regions of my field that I have passed through and re ...
... 6 years, I can’t resist evoking one of my favorite quotes from J.R.R. Tolkien, who reminds us: “Not all who wander are lost”. Indeed, the most rewarding part of assembling what follows was to see, in retrospect, the paths connecting the different regions of my field that I have passed through and re ...
Lanthanides and Actinides
... actinides, which cause a huge number of spectral lines. A simple model is needed to extract the basic features of the electronic structure and to enable a successful analysis of the experimentally determined data to be made. For an experimental chemist the exact quantum mechanical classification of ...
... actinides, which cause a huge number of spectral lines. A simple model is needed to extract the basic features of the electronic structure and to enable a successful analysis of the experimentally determined data to be made. For an experimental chemist the exact quantum mechanical classification of ...
How to characterize the dynamics of cold atoms in non
... of these was the achievement of the Bose–Einstein condensation, and thus of macroscopic quantum objects. However, even in the classical world, the possibility of studying the dynamics of atoms not ‘blurred’ by the Doppler effect is very exciting. This requires the development of tools to manipulate ...
... of these was the achievement of the Bose–Einstein condensation, and thus of macroscopic quantum objects. However, even in the classical world, the possibility of studying the dynamics of atoms not ‘blurred’ by the Doppler effect is very exciting. This requires the development of tools to manipulate ...
Atomic Physics Division Fachverband - DPG
... of the correlated final spin system. Explicit spin-dependent interactions are neglected and electron exchange only is taken into account. It is shown that the final spin system is completely characterized by a single spin correlation parameter depending on scattering angle and energy. Its numerical ...
... of the correlated final spin system. Explicit spin-dependent interactions are neglected and electron exchange only is taken into account. It is shown that the final spin system is completely characterized by a single spin correlation parameter depending on scattering angle and energy. Its numerical ...
Spin-Resolved Spectroscopic Studies of Topologically Ordered Materials
... It has recently been proposed that band insulators with strong spin-orbit coupling can support a new phase of quantum matter called a ‘topological insulator’. This exotic phase of matter is a subject of intense research because it is predicted to give rise to dissipationless spin currents, axion ele ...
... It has recently been proposed that band insulators with strong spin-orbit coupling can support a new phase of quantum matter called a ‘topological insulator’. This exotic phase of matter is a subject of intense research because it is predicted to give rise to dissipationless spin currents, axion ele ...
Ferromagnetism
Not to be confused with Ferrimagnetism; for an overview see Magnetism.Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets. In physics, several different types of magnetism are distinguished. Ferromagnetism (including ferrimagnetism) is the strongest type: it is the only one that typically creates forces strong enough to be felt, and is responsible for the common phenomena of magnetism in magnets encountered in everyday life. Substances respond weakly to magnetic fields with three other types of magnetism, paramagnetism, diamagnetism, and antiferromagnetism, but the forces are usually so weak that they can only be detected by sensitive instruments in a laboratory. An everyday example of ferromagnetism is a refrigerator magnet used to hold notes on a refrigerator door. The attraction between a magnet and ferromagnetic material is ""the quality of magnetism first apparent to the ancient world, and to us today"".Permanent magnets (materials that can be magnetized by an external magnetic field and remain magnetized after the external field is removed) are either ferromagnetic or ferrimagnetic, as are other materials that are noticeably attracted to them. Only a few substances are ferromagnetic. The common ones are iron, nickel, cobalt and most of their alloys, some compounds of rare earth metals, and a few naturally-occurring minerals such as lodestone.Ferromagnetism is very important in industry and modern technology, and is the basis for many electrical and electromechanical devices such as electromagnets, electric motors, generators, transformers, and magnetic storage such as tape recorders, and hard disks.