Browsing by Keywords "Quantum mechanics"
Now showing items 18 of 8

Density profile of a BoseEinstein condensate inside a pancakeshaped trap: Observational consequences of the dimensional crossover in the scattering properties
(Elsevier Science B.V., 2002)It is theoretically well known that twodimensionality of the scattering events in a BoseEinstein condensate introduces a logarithmic dependence on density in the coupling constant entering a meanfield theory of the ... 
Effect of fractional Fourier transformation on timefrequency distributions belonging to the Cohen class
(Institute of Electrical and Electronics Engineers, 199602)We consider the Cohen (1989) class of timefrequency distributions, which can be obtained from the Wigner distribution by convolving it with a kernel characterizing that distribution. We show that the timefrequency ... 
Formation of quantum structures on a single nanotube by modulating hydrogen adsorption
(American Physical Society, 2003)Using firstprinciples density functional calculations we showed that quantum structures can be generated on a single carbon nanotube by modulating the adsorption of hydrogen atoms. The band gap of the hydrogenfree zone ... 
Ladder approximation in coupled quantumwell systems
(American Physical Society, 2001)We study the contact values of the interlayer paircorrelation function in electronelectron and electronhole doublelayer systems. For this purpose the ladder approximation as generalized to multicomponent systems is ... 
Orbital magnetization of single and double quantum dots in a tightbinding model
(American Physical Society, 2003)We calculate the orbital magnetization of single and double quantum dots coupled both by Coulomb interaction and by electron tunneling. The electronic states of the quantum dots are calculated in a tightbinding model, and ... 
Quantum effects of thermal conductance through atomic chains
(2001)We present a formalism for an atomic scale study of phononic heat transfer. The expression of thermal energy current can be cast in the Landauer form and incorporates the transmission coefficient explicitly. Calculation ... 
Tunneling properties of quantum dot arrays in a strong magnetic field
(The American Physical Society, 2004)We study the transport properties of coherently coupled quantum dots in the quantum Hall regime within the LandauerBüttiker formalism which captures and explains the experimentally observed features in terms of the spectral ... 
Variable and reversible quantum structures on a single carbon nanotube
(2000)The band gap of a semiconducting single wall carbon nanotube decreases and eventually vanishes leading to metalization as a result of increasing radial deformation. This sets in a band offset between the undeformed and ...