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Atomic Physics - NMSU Astronomy
Atomic Physics - NMSU Astronomy

Spin-Orbital Liquid on a Triangular Lattice
Spin-Orbital Liquid on a Triangular Lattice

... In Fig. 2 we compare the phase diagrams obtained from the above MF procedure and from exact diagonalization for the N9 cluster. Consider rst a quantum phase transition from the low-spin (St = 1/2) disordered phase to the high-spin (St = 9/2) ferromagnetic (FM) phase which occurs for suciently larg ...
Document
Document

Effect of an industrial chemical waste on the uptake
Effect of an industrial chemical waste on the uptake

... At the beginning, it was found sensible to estimate the relationship between characteristic molecular-energy values and the quantity kT , where k is the Boltzmann constant and T the temperature. In the present study, instead of energy, the wave number,  = E/hc, expressed in cm–1 (1 J is equivalent ...
Analysis of a single-atom dipole trap
Analysis of a single-atom dipole trap

On two possible definitions of the free energy for collective variables
On two possible definitions of the free energy for collective variables

Electronic structures of „In,Ga…As/GaAs quantum dot molecules
Electronic structures of „In,Ga…As/GaAs quantum dot molecules

Resonances in three-body systems S U L
Resonances in three-body systems S U L

... In this thesis we apply non-relativistic quantum mechanics to study three-body problems. We use interaction potentials of Coulombic or Gaussian forms. However, the formal and numerical approaches, used in this work, are in principle applicable to any three-body system. We are interested in how the e ...
Cooling and Trapping Neutral Atoms
Cooling and Trapping Neutral Atoms

... understanding superconductivity in many materials. By simulating such systems using cold atomic gases, various condensed matter models can be studied in a highly controllable environment. We have observed coherence and thus indirect evidence for superfluidity of interacting fermions in an optical la ...
zeeman effect
zeeman effect

QuantumDynamics_QuickView
QuantumDynamics_QuickView

... The probability density for mixed states has some time-independent components plus components that oscillate at the difference frequencies,  |m - n|. An oscillating probability density represents a particle that is accelerating. Exercise: Show that if mixed (r , t )  a un (r ) eint  bum (r ...
Copyright c 2016 by Robert G. Littlejohn Physics 221A Fall 2016
Copyright c 2016 by Robert G. Littlejohn Physics 221A Fall 2016

Quantum Hall Effect
Quantum Hall Effect

... Since the Hall voltage is being held constant,the fact that the current does not change as the magnetic eld is varied implies that the Hall resistance also remains constant. Whenever the Fermi level is in the sub-band of localized states, then, the Hall Resistance remains the same even when the mag ...
Quantum-dot lithium in zero magnetic field: Electronic properties
Quantum-dot lithium in zero magnetic field: Electronic properties

... many-body states is smaller than some threshold value Eth , Eusp ≤ Eth . The larger the threshold energy Eth , the broader the range of λ in which results are convergent and reliable. Typically, less than 1000 many-particle states were sufficient for all the calculations presented below. Convergency ...
From Irrational to Non-Unitary: on the Haffnian and Haldane
From Irrational to Non-Unitary: on the Haffnian and Haldane

... their total angular momentum projection Lz . There exists a ‘root configuration’ from which all configurations of the Fock states with a priori non-zero coefficients can be obtained. Obtaining these states is done by ‘squeezing’, a procedure in which the relative angular momentum of two particles is ...
pdf
pdf

... one another at a Feshbach resonance. The next question was whether these weakly bound molecules could survive long enough for the gas to be cooled down to the temperatures required for Bose-Einstein condensation? Fortunately, the lifetime of these molecules increases as one approaches a Feshbach res ...
Quantum entanglement between the electron clouds of nucleic acids
Quantum entanglement between the electron clouds of nucleic acids

Disalignment rate coefficient of neon excited atoms due to helium
Disalignment rate coefficient of neon excited atoms due to helium

Nature 425, (937
Nature 425, (937

UvA-DARE (Digital Academic Repository)
UvA-DARE (Digital Academic Repository)

... transition frequencies of potassium have been published by Falke et al. [102]. Table A.3 and A.4 list the properties of the D1 and D2 lines respectively. The natural lifetime ...
2.1 2. NUCLEAR PHENOMENOLOGY We turn now to
2.1 2. NUCLEAR PHENOMENOLOGY We turn now to

Spectroscopy of Atoms and Molecules
Spectroscopy of Atoms and Molecules

Proton tunneling in hydrogen bonds and its possible implications in
Proton tunneling in hydrogen bonds and its possible implications in

... sion, Van der Walls interaction, and London dispersion. Finally, J stands for the orbital interactions that drive proton tunneling. Functional dependence of this hopping coefficient on the geometric parameters r, R, and φ can be written in a similar way to the coupling constant of diabatic state mod ...
Lattice Vibrations, Phonons, Specific Heat Capacity, Thermal
Lattice Vibrations, Phonons, Specific Heat Capacity, Thermal

Differential Conductance of Magnetic Impurities on a
Differential Conductance of Magnetic Impurities on a

... We have used an accurate method to calculate the differential conductance when an STM tip is placed over a single magnetic impurity on a metallic surface. We found that the differential conductance is highly dependent on local impurity parameters (f , U, Γ) as well as the ratio tf /tc of tunneling ...
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Tight binding

In solid-state physics, the tight-binding model (or TB model) is an approach to the calculation of electronic band structure using an approximate set of wave functions based upon superposition of wave functions for isolated atoms located at each atomic site. The method is closely related to the LCAO method used in chemistry. Tight-binding models are applied to a wide variety of solids. The model gives good qualitative results in many cases and can be combined with other models that give better results where the tight-binding model fails. Though the tight-binding model is a one-electron model, the model also provides a basis for more advanced calculations like the calculation of surface states and application to various kinds of many-body problem and quasiparticle calculations.
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