Browsing by Keywords "Ground state"
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Absence of phase transitions in onedimensional antiferromagnetic models with longrange interactions
(Kluwer Academic PublishersPlenum PublishersSpringer New York LLC, 1993)The absence of phase transitions in a onedimensional model with longrange antiferromagnetic potential is established at low temperatures when the ground states have a rational density. A description of the set of all ... 
Anisotropic electronic, mechanical, and optical properties of monolayer WTe2
(American Institute of Physics Inc., 2016)Using firstprinciples calculations, we investigate the electronic, mechanical, and optical properties of monolayer WTe2. Atomic structure and ground state properties of monolayer WTe2 (Td phase) are anisotropic which are ... 
Atomic and electronic structure of carbon strings
(IOP Publishing Ltd., 2005)This paper presents an extensive study of various string and tubular structures formed by carbon atomic chains. Our study is based on firstprinciples pseudopotential plane wave and finitetemperature ab initio molecular ... 
Charge retention in quantized energy levels of nanocrystals
(Elsevier B.V., 2007)Understanding charging mechanisms and charge retention dynamics of nanocrystal (NC) memory devices is important in optimization of device design. Capacitance spectroscopy on PECVD grown germanium NCs embedded in a silicon ... 
Compressibility of a twodimensional electron gas in a parallel magnetic field
(Elsevier B.V., 2007)The thermodynamic compressibility of a twodimensional electron system in the presence of an inplane magnetic field is calculated. We use accurate correlation energy results from quantum Monte Carlo simulations to construct ... 
A condition for the uniqueness of Gibbs states in onedimensional models
(Elsevier BV * NorthHolland, 1998)Uniqueness of limit Gibbs states of one dimensional models with a unique "stable" ground state is established at low temperatures. © 1998 Elsevier Science B.V. All rights reserved. 
Correlation effects in a onedimensional electron gas with shortrange interaction
(Pergamon Press, 1999)We study the correlation effects in a onedimensional electron gas with repulsive deltafunction interaction. The correlation effects are described by a localfield correction which takes into account the shortrange ... 
Dcswitchable and singlenanocrystaladdressable coherent population transfer
(2010)Achieving coherent population transfer in the solidstate is challenging compared to atomic systems due to closely spaced electronic states and fast decoherence. Here, within an atomistic pseudopotential theory, we offer ... 
Effect of disorder on the interacting fermi gases in a onedimensional optical lattice
(World Scientific Publishing Co., 2008)Interacting twocomponent Fermi gases loaded in a onedimensional (1D) lattice and subjected to a harmonic trapping potential exhibit interesting compound phases in which fluid regions coexist with local Mottinsulator ... 
Energetics and Electronic Structures of Individual Atoms Adsorbed on Carbon Nanotubes
(American Chemical Society, 2004)The adsorption of individual atoms on the semiconducting and metallic singlewalled carbon nanotubes (SWNT) has been investigated by using the first principles pseudopotential plane wave method within density functional ... 
The ground state and vortices in a twodimensional Bose gas confined in a harmonic trap
(Institute of Physics Publishing, 2002)We study the ground state properties of a twodimensional Bose gas in an harmonic trap potential using the recently proposed meanfield equation that takes into account the correct dimensionality effect. In contrast to the ... 
Ground states of onedimensional longrange ferromagnetic ising model with external field
(World Scientific Publishing, 2012)A zerotemperature phasediagram of the onedimensional ferromagnetic Ising model is investigated. It is shown that at zero temperature spins of any compact collection of lattice points with identically oriented external ... 
Groundstate properties and collective excitations in a 2D BoseEinstein condensate with gravitylike interatomic attraction
(Springer, 2008)We study the groundstate properties of a BoseEinstein condensate (BEC) with the shortrange repulsion and gravitylike 1/r interatomic attraction in twodimensions (2D). Using the variational approach, we obtain the ... 
Groundstate properties, vortices, and collective excitations in a twodimensional BoseEinstein condensate with gravitylike interatomic attraction
(The American Physical Society, 2008)We study the groundstate properties of a BoseEinstein condensate with shortrange repulsion and gravitylike 1/r interatomic attraction in twodimensions (2D). Using the variational approach we obtain the groundstate ... 
HartreeFock approximation of bipolaron state in quantum dots and wires
(Springer, 2010)The bipolaronic ground state of two electrons in a spherical quantum dot or a quantum wire with parabolic boundaries is studied in the strong electronphonon coupling regime. We introduce a variational wave function that ... 
Impurity coupled to an artificial magnetic field in a Fermi gas in a ring trap
(American Physical Society, 2015)The dynamics of a single impurity interacting with a manyparticle background is one of the central problems of condensedmatter physics. Recent progress in ultracoldatom experiments makes it possible to control this ... 
Manybody properties of a disordered charged Bose gas superlattice
(Academic Press, 2000)We study some manybody properties of a disordered charged Bose gas (CBG) superlatticean infinite array of CBG layers each of which containing disorder. The latter is assumed to cause collisions with the charged bosons, ... 
On the uniqueness of Gibbs states in the PirogovSinai theory
(World Scientific Publishing Co. Pte. Ltd., 2006)We consider models of classical statistical mechanics satisfying natural stability conditions: a finite spin space, translationperiodic finite potential of finite range, a finite number of ground states meeting Peierls ... 
OneDimensional Long Range WidomRowlinson Model with Periodic Particle Activities
(World Scientific Publishing Company, 2013) 
Onedimensional longrange ferromagnetic ising model under weak and sparse external field
(2009)We consider the onedimensional ferromagnetic Ising model with very long range interaction under weak and sparse biased external field and prove that at sufficiently low temperatures, the model has a unique limiting Gibbs ...