Quantum phase transitions and novel phases in condensed matter
... • new states of matter often can be found at low temperatures and at boundaries between existing phases • quantum phase transitions occur at zero temperature as a function of a parameter like pressure, chemical composition, disorder, magnetic field • quantum phase transitions are caused by quantum flu ...
... • new states of matter often can be found at low temperatures and at boundaries between existing phases • quantum phase transitions occur at zero temperature as a function of a parameter like pressure, chemical composition, disorder, magnetic field • quantum phase transitions are caused by quantum flu ...
A violation of the uncertainty principle implies a violation of the
... principle1. This forged a relation between two fundamental quantum mechanical concepts. We may however still ask why the uncertainty principle itself is not maybe stronger or weaker than predicted by quantum physics?—and, what would happen if it was? Here we relate this question to the second law of ...
... principle1. This forged a relation between two fundamental quantum mechanical concepts. We may however still ask why the uncertainty principle itself is not maybe stronger or weaker than predicted by quantum physics?—and, what would happen if it was? Here we relate this question to the second law of ...
Quantum Criticality: competing ground states in low
... critical points are described using simple theoretical models. Possible quantum phases and transitions in the two-dimensional electron gas on a square lattice are discussed. ...
... critical points are described using simple theoretical models. Possible quantum phases and transitions in the two-dimensional electron gas on a square lattice are discussed. ...
The speed of quantum information and the preferred frame
... In an optical EPR experiment (Fig. 1), two photons are produced in an entangled state and sent to two analyzing stations A and B. The quantum entanglement manifests itself by the interference fringes that are observed in the coincidence counts of the detectors in A and B. These interferences are pre ...
... In an optical EPR experiment (Fig. 1), two photons are produced in an entangled state and sent to two analyzing stations A and B. The quantum entanglement manifests itself by the interference fringes that are observed in the coincidence counts of the detectors in A and B. These interferences are pre ...
Even-denominator fractional quantum Hall effect in bilayer graphene
... Graphene-on-substrate is an elastic membrane with (frozen) random height flucuations that cause strain 1) distortion (scalar) potentials; 2) random hopping integrals (gauge potentials) Calculate scattering time (Fermi golden rune) and mobility Scalar = screened Gauge = NOT screened ...
... Graphene-on-substrate is an elastic membrane with (frozen) random height flucuations that cause strain 1) distortion (scalar) potentials; 2) random hopping integrals (gauge potentials) Calculate scattering time (Fermi golden rune) and mobility Scalar = screened Gauge = NOT screened ...
Mixing Transformations in Quantum Field Theory and Neutrino
... The Fock space for mixed fields appears to be unitarily inequivalent to the Fock space of the original (unmixed) fields in the infinite volume limit. The question arises if such a new structure leads to any possibly testable effect. For such a purpose, we investigate in detail neutrino mixing and os ...
... The Fock space for mixed fields appears to be unitarily inequivalent to the Fock space of the original (unmixed) fields in the infinite volume limit. The question arises if such a new structure leads to any possibly testable effect. For such a purpose, we investigate in detail neutrino mixing and os ...
Inhomogeneities in the Universe DESY, 2004
... • On super horizon scales, x<1, Y is constant • On sub horizon scales, Dg and V oscillate while Y oscillates and decays like 1/x2 in a radiation universe. ...
... • On super horizon scales, x<1, Y is constant • On sub horizon scales, Dg and V oscillate while Y oscillates and decays like 1/x2 in a radiation universe. ...
On the three-dimensional configuration of electrostatic solitary waves
... where λL =λL (u) is the typical screening scale length depending on the EH velocity u and unperturbed electron distribution f0 (W ). The last term in Eq. (3) is the contribution of the electron hole. This term, nH (φ)>0, describes the excess positive charge q=nH (φ) caused by the deficit of the elec ...
... where λL =λL (u) is the typical screening scale length depending on the EH velocity u and unperturbed electron distribution f0 (W ). The last term in Eq. (3) is the contribution of the electron hole. This term, nH (φ)>0, describes the excess positive charge q=nH (φ) caused by the deficit of the elec ...
density matrices
... In general, the state of a two-register system may not be of the form (it may contain entanglement or correlations) We can define the partial trace, Tr2 , as the unique linear operator satisfying the identity Tr2( ) = index means For example, it turns out that ...
... In general, the state of a two-register system may not be of the form (it may contain entanglement or correlations) We can define the partial trace, Tr2 , as the unique linear operator satisfying the identity Tr2( ) = index means For example, it turns out that ...
the zeeman effect
... On the other hand, when the atom undergoes a ( transition ("MJ = ±1), its optically active electron performs a rotary motion in the x-y plane in order that the photon emitted carry angular momentum about the z-axis. The electric field then lies predominately in the x-y plane. Seen edge on, this cons ...
... On the other hand, when the atom undergoes a ( transition ("MJ = ±1), its optically active electron performs a rotary motion in the x-y plane in order that the photon emitted carry angular momentum about the z-axis. The electric field then lies predominately in the x-y plane. Seen edge on, this cons ...
Physics 139B Solutions to Homework Set 4 Fall 2009 1. Liboff
... probability of a transition from the ground state to the first excited state is nonnegligible. However, keep in mind that if P0→1 must still be small as compared to 1 if the perturbation theory result is to be reliable. In case (b), there are no first-order transitions from the ground state to excit ...
... probability of a transition from the ground state to the first excited state is nonnegligible. However, keep in mind that if P0→1 must still be small as compared to 1 if the perturbation theory result is to be reliable. In case (b), there are no first-order transitions from the ground state to excit ...
Physics, Chapter 43: X-Rays - DigitalCommons@University of
... The study of the electric discharge through gases led directly to the discovery of x-rays by W. C. Roentgen in 1895. While operating a gasdischarge tube, Roentgen observed that a platinum-barium cyanide screen at some distance from the tube fluoresced. He shielded the tube so that no visible radiati ...
... The study of the electric discharge through gases led directly to the discovery of x-rays by W. C. Roentgen in 1895. While operating a gasdischarge tube, Roentgen observed that a platinum-barium cyanide screen at some distance from the tube fluoresced. He shielded the tube so that no visible radiati ...
CHM 1025 Chapter 9 web
... • Observation: When certain elements are heated or electronically excited, they emit light of different colors. When the light is separated into various colors by a spectroscope, a spectrum is observed. • Light is one type of electromagnetic radiation. C. Gambino ...
... • Observation: When certain elements are heated or electronically excited, they emit light of different colors. When the light is separated into various colors by a spectroscope, a spectrum is observed. • Light is one type of electromagnetic radiation. C. Gambino ...
Quantum electrodynamics
In particle physics, quantum electrodynamics (QED) is the relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter interact and is the first theory where full agreement between quantum mechanics and special relativity is achieved. QED mathematically describes all phenomena involving electrically charged particles interacting by means of exchange of photons and represents the quantum counterpart of classical electromagnetism giving a complete account of matter and light interaction.In technical terms, QED can be described as a perturbation theory of the electromagnetic quantum vacuum. Richard Feynman called it ""the jewel of physics"" for its extremely accurate predictions of quantities like the anomalous magnetic moment of the electron and the Lamb shift of the energy levels of hydrogen.