Paper
... Experimental methods of laser and evaporative cooling, used in the production of atomic Bose-Einstein condensates (BEC) [1], have recently been extended to realize quantum degeneracy in trapped Fermi gases [2–5]. What makes gaseous fermionic systems particularly appealing to investigate is the relat ...
... Experimental methods of laser and evaporative cooling, used in the production of atomic Bose-Einstein condensates (BEC) [1], have recently been extended to realize quantum degeneracy in trapped Fermi gases [2–5]. What makes gaseous fermionic systems particularly appealing to investigate is the relat ...
Dilute Fermi and Bose Gases - Subir Sachdev
... LF is just a free field theory. Like ZB , ZF has a quantum critical point at µ = 0, T = 0 and we will discuss its properties; in particular, we will show that all possible fermionic nonlinearities are irrelevant near it. The reader should not be misled by the apparently trivial nature of the model i ...
... LF is just a free field theory. Like ZB , ZF has a quantum critical point at µ = 0, T = 0 and we will discuss its properties; in particular, we will show that all possible fermionic nonlinearities are irrelevant near it. The reader should not be misled by the apparently trivial nature of the model i ...
Danish-Sino Workshop on Strongly Interacting Cold Atomic Gases
... the scattering amplitude is usually calculated via 1st-order Born approximation. Our results show that significant derivation from this approximation can arise in some cases. In these cases the SRI can significantly modify the dipole-dipole scattering amplitude, even if the scattering amplitude for ...
... the scattering amplitude is usually calculated via 1st-order Born approximation. Our results show that significant derivation from this approximation can arise in some cases. In these cases the SRI can significantly modify the dipole-dipole scattering amplitude, even if the scattering amplitude for ...
Fermion-Fermion and Boson-Boson Interactions at low
... For Bosons the situation is similar, but in some ways more difficult: Going from negative to positive a and vice versa, a real Phase transition occurs between a) a phase where only molecule BEC-states exists (far on the molecule side of the Feshbach Resonance) b) a phase where both molecule and at ...
... For Bosons the situation is similar, but in some ways more difficult: Going from negative to positive a and vice versa, a real Phase transition occurs between a) a phase where only molecule BEC-states exists (far on the molecule side of the Feshbach Resonance) b) a phase where both molecule and at ...
Paper
... (atom shot noise) for cold clouds deep in the quantum degenerate regime. Strong suppression is observed for probe volumes containing more than 10 000 atoms. Measuring the level of suppression provides sensitive thermometry at low temperatures. After this method of sensitive noise measurements has be ...
... (atom shot noise) for cold clouds deep in the quantum degenerate regime. Strong suppression is observed for probe volumes containing more than 10 000 atoms. Measuring the level of suppression provides sensitive thermometry at low temperatures. After this method of sensitive noise measurements has be ...
When Energy Conservation Seems to Fail: The Prediction of the
... Another issue concerned the inherent angular momentum (spin) of the alleged electrons in the nucleus. According to quantum mechanics, the electron had a spin. As for the bound electrons in the atom, the idea that the electron had a mechanical momentum and a magnetic moment seemed to work. Moreover, ...
... Another issue concerned the inherent angular momentum (spin) of the alleged electrons in the nucleus. According to quantum mechanics, the electron had a spin. As for the bound electrons in the atom, the idea that the electron had a mechanical momentum and a magnetic moment seemed to work. Moreover, ...
Book of Abstracts
... setting the mean-field interactions to attractive in an ultracold bosonic dysprosium gas. This has been attributed to the distinct non-vanishing beyond-mean-field effects when canceling the mean interaction in presence of DDI and is thus expected to be general to dipolar gases. Here, we report on th ...
... setting the mean-field interactions to attractive in an ultracold bosonic dysprosium gas. This has been attributed to the distinct non-vanishing beyond-mean-field effects when canceling the mean interaction in presence of DDI and is thus expected to be general to dipolar gases. Here, we report on th ...
slide
... Always marginal thanks to the dimensional reduction in the LLL. Magnetic catalysis of chiral condensate (Chiral symmetry is broken even in QED.) Gusynin, Miransky, and Shovkovy. Lattice QCD data also available (Bali et al.). ...
... Always marginal thanks to the dimensional reduction in the LLL. Magnetic catalysis of chiral condensate (Chiral symmetry is broken even in QED.) Gusynin, Miransky, and Shovkovy. Lattice QCD data also available (Bali et al.). ...
Localization and the Integer Quantum Hall effect
... t ∼ W , and the bandwidth is of the same order.) (b). critical divergence of localization length, as a function of eigenstate energy (c). [not included here](A lecture on Anderson Loc. would also show a graph of the diffusion constant as a function of E: it is nonzero only in the (middle) interval o ...
... t ∼ W , and the bandwidth is of the same order.) (b). critical divergence of localization length, as a function of eigenstate energy (c). [not included here](A lecture on Anderson Loc. would also show a graph of the diffusion constant as a function of E: it is nonzero only in the (middle) interval o ...
Holographic Metals and the Fractionalized Fermi
... compatible with a k-dependent self-energy, and this should ultimately lift the ground state entropy. Some of the considerations of Refs. [6,10] may already represent progress in this discussion. Refs. [12,13] also discussed the nature of the quantum phase transition between the FFL and FL phases. It ...
... compatible with a k-dependent self-energy, and this should ultimately lift the ground state entropy. Some of the considerations of Refs. [6,10] may already represent progress in this discussion. Refs. [12,13] also discussed the nature of the quantum phase transition between the FFL and FL phases. It ...
107, 195303 (2011)
... Ultracold Fermi gases with tunable atom interaction through Feshbach resonance [1] have garnered tremendous attention recently [2] for their potential use as an ideal platform for emulating many important physical phenomena. Interesting physics, including the crossover from Bardeen-Cooper-Schrieffer ...
... Ultracold Fermi gases with tunable atom interaction through Feshbach resonance [1] have garnered tremendous attention recently [2] for their potential use as an ideal platform for emulating many important physical phenomena. Interesting physics, including the crossover from Bardeen-Cooper-Schrieffer ...
The Semiclassical Electron in a Magnetic Field and Lattice. Some
... Em (p), n 6= m, for the isolated points p only. Therefore, in the generic case there are no such points on the important chosen surface—the so-called Fermi surface M 2 : {E = E0 }. This energy level E0 (Fermi Level ) is an intrinsic invariant of a metal, depending on the number of free electrons in ...
... Em (p), n 6= m, for the isolated points p only. Therefore, in the generic case there are no such points on the important chosen surface—the so-called Fermi surface M 2 : {E = E0 }. This energy level E0 (Fermi Level ) is an intrinsic invariant of a metal, depending on the number of free electrons in ...
2010
... Systems of fermions obey the Pauli exclusion principle. Processes that would require two fermions to occupy the same quantum state are suppressed. In recent years, several classic experiments have observed different manifestations of Pauli suppression in Fermi gases. Here we study density profiles of ...
... Systems of fermions obey the Pauli exclusion principle. Processes that would require two fermions to occupy the same quantum state are suppressed. In recent years, several classic experiments have observed different manifestations of Pauli suppression in Fermi gases. Here we study density profiles of ...
Fermions coupled to gauge fields .1in with cond
... charges are not mobile in the AdS radial direction. (Like metal of finite extent along one axis.) An electric field applied to an insulator polarizes it. ...
... charges are not mobile in the AdS radial direction. (Like metal of finite extent along one axis.) An electric field applied to an insulator polarizes it. ...
Mesoscopic Effects in the Fractional Quantum Hall Regime: Chiral Luttinger... versus Fermi Liquid
... Fermi liquid and our predicted nearly Fermi-liquid temperature dependence. High-voltage sV ¿ T0 d regime.—Again there are three temperature regimes. At the lowest temperatures, T ø T0 ø V , the response is nonlinear. The direct contribution varies with voltage as I0 ~ V 2q21 . The AB current is more ...
... Fermi liquid and our predicted nearly Fermi-liquid temperature dependence. High-voltage sV ¿ T0 d regime.—Again there are three temperature regimes. At the lowest temperatures, T ø T0 ø V , the response is nonlinear. The direct contribution varies with voltage as I0 ~ V 2q21 . The AB current is more ...
13 Classical and quantum statistics
... Thus the kinetic energy of an atom or molecule is given by (1/2) kT. Equation (13.29) is called the equipartition law, which states that each ‘degree of freedom’ contributes (1/2) kT to the total kinetic energy. Next we will focus on the energetic distribution of electrons. The properties which hav ...
... Thus the kinetic energy of an atom or molecule is given by (1/2) kT. Equation (13.29) is called the equipartition law, which states that each ‘degree of freedom’ contributes (1/2) kT to the total kinetic energy. Next we will focus on the energetic distribution of electrons. The properties which hav ...
Paper
... polarized Fermi gas. We argue that it is not possible to distinguish the superfluid from the normal regimes in the presented data, or to discern which clouds were phase-separated. Some of the reported conclusions are inconsistent with recent experiments. artridge et al. (1) recently reported the obs ...
... polarized Fermi gas. We argue that it is not possible to distinguish the superfluid from the normal regimes in the presented data, or to discern which clouds were phase-separated. Some of the reported conclusions are inconsistent with recent experiments. artridge et al. (1) recently reported the obs ...
Statistical Mechanics of Ideal Fermi Systems
... Statistical Mechanics of Ideal Fermi Systems from Statistical Physics using Mathematica © James J. Kelly, 1996-2002 The statistical mechanics of ideal Fermi-Dirac systems is developed in terms of special functions defined by integrating the mean occupation number against powers of the single-particl ...
... Statistical Mechanics of Ideal Fermi Systems from Statistical Physics using Mathematica © James J. Kelly, 1996-2002 The statistical mechanics of ideal Fermi-Dirac systems is developed in terms of special functions defined by integrating the mean occupation number against powers of the single-particl ...
PHZ 7427 SOLID STATE II: Electron-electron interaction and the
... Such a power-law scaling was indeed observed in carbon nanotubes (which are essentially quantum wires with two channels) ...
... Such a power-law scaling was indeed observed in carbon nanotubes (which are essentially quantum wires with two channels) ...
Collective molecule formation in a degenerate
... degenerate Fermi gases. By sweeping a magnetic field across a Feshbach resonance, at least part of the atoms have been demonstrably converted into molecules [2, 3]. Magnetoassociation of atoms into molecules via a Feshbach resonance is also the key to experiments in which formation of a molecular con ...
... degenerate Fermi gases. By sweeping a magnetic field across a Feshbach resonance, at least part of the atoms have been demonstrably converted into molecules [2, 3]. Magnetoassociation of atoms into molecules via a Feshbach resonance is also the key to experiments in which formation of a molecular con ...
Folds, Bosonization and non-triviality of the classical limit of 2D
... the string theory space-time from the matrix model, since the w±,n 6= 0 and are needed to specify the classical state of the fermi fluid while in the far asymptotic region the collective field configurations alone exhaust the possible configurations of the string theory tachyon field 1 . Under time ...
... the string theory space-time from the matrix model, since the w±,n 6= 0 and are needed to specify the classical state of the fermi fluid while in the far asymptotic region the collective field configurations alone exhaust the possible configurations of the string theory tachyon field 1 . Under time ...
et al.
... ・Large exciton binding energy. ・Strong absorption of exciton groundstate. ・High speed optical modulation device. ・High performance laser device. ...
... ・Large exciton binding energy. ・Strong absorption of exciton groundstate. ・High speed optical modulation device. ・High performance laser device. ...
Chapter 9. Electrons in magnetic fields
... correspondence to a single particle excitation of the Fermi gas. We can follow this oneone correspondence by turn the knob of interactions. Therefore, excitation of a Fermi liquid can be consider as a particle, called quasiparticle. It may be thought of a single particle dressed with a distortion cl ...
... correspondence to a single particle excitation of the Fermi gas. We can follow this oneone correspondence by turn the knob of interactions. Therefore, excitation of a Fermi liquid can be consider as a particle, called quasiparticle. It may be thought of a single particle dressed with a distortion cl ...
pptx - University of Washington
... whether such fermion matter is stable or not! A number of people argued that under such conditions Fermionic matter is unstable. - systems of bosons are unstable (Efimov effect) - systems of three or more fermion species are unstable (Efimov effect) • Baker (LANL, winner of the MBX challenge) conclu ...
... whether such fermion matter is stable or not! A number of people argued that under such conditions Fermionic matter is unstable. - systems of bosons are unstable (Efimov effect) - systems of three or more fermion species are unstable (Efimov effect) • Baker (LANL, winner of the MBX challenge) conclu ...
Enrico Fermi
Enrico Fermi (Italian: [enˈriko ˈfermi]; 29 September 1901 – 28 November 1954) was an Italian physicist, who is credited with the creation of the first nuclear reactor, the Chicago Pile-1. He made significant contributions to the development of quantum theory, nuclear and particle physics, and statistical mechanics. He is one of the men referred to as the ""architect and father of the atomic bomb"". Fermi held several patents related to the use of nuclear power, and was awarded the 1938 Nobel Prize in Physics for his work on induced radioactivity by neutron bombardment and the discovery of transuranic elements. He was widely regarded as one of the very few physicists to excel both theoretically and experimentally.Fermi's first major contribution was to statistical mechanics. After Wolfgang Pauli announced his exclusion principle in 1925, Fermi followed with a paper in which he applied the principle to an ideal gas, employing a statistical formulation now known as Fermi–Dirac statistics. Today, particles that obey the exclusion principle are called ""fermions"". Later Pauli postulated the existence of an uncharged invisible particle emitted along with an electron during beta decay, to satisfy the law of conservation of energy. Fermi took up this idea, developing a model that incorporated the postulated particle, which he named the ""neutrino"". His theory, later referred to as Fermi's interaction and still later as weak interaction, described one of the four fundamental forces of nature. Through experiments inducing radioactivity with recently discovered neutrons, Fermi discovered that slow neutrons were more easily captured than fast ones, and developed the Fermi age equation to describe this. After bombarding thorium and uranium with slow neutrons, he concluded that he had created new elements; although he was awarded the Nobel Prize for this discovery, the new elements were subsequently revealed to be fission products.Fermi left Italy in 1938 to escape new Italian Racial Laws that affected his Jewish wife Laura. He emigrated to the United States where he worked on the Manhattan Project during World War II. Fermi led the team that designed and built Chicago Pile-1, which went critical on 2 December 1942, demonstrating the first artificial self-sustaining nuclear chain reaction. He was on hand when the X-10 Graphite Reactor at Oak Ridge, Tennessee, went critical in 1943, and when the B Reactor at the Hanford Site did so the next year. At Los Alamos he headed F Division, part of which worked on Edward Teller's thermonuclear ""Super"" bomb. He was present at the Trinity test on 16 July 1945, where he used his Fermi method to estimate the bomb's yield.After the war, Fermi served under J. Robert Oppenheimer on the influential General Advisory Committee, which advised the Atomic Energy Commission on nuclear matters and policy. Following the detonation of the first Soviet fission bomb in August 1949, he strongly opposed the development of a hydrogen bomb on both moral and technical grounds. He was among the scientists who testified on Oppenheimer's behalf at the 1954 hearing that resulted in the denial of the latter's security clearance. Fermi did important work in particle physics, especially related to pions and muons, and he speculated that cosmic rays arose through material being accelerated by magnetic fields in interstellar space. Many awards, concepts, and institutions are named after Fermi, including the Enrico Fermi Award, the Enrico Fermi Institute, the Fermi National Accelerator Laboratory, the Fermi Gamma-ray Space Telescope, the Enrico Fermi Nuclear Generating Station, and the synthetic element fermium (one of just over a dozen elements named after people).