نتایج جستجو برای: quantum confinement
تعداد نتایج: 312482 فیلتر نتایج به سال:
We present results for the masses of the low-lying states with quantum numbers 0, 2 and 1 as well as Polyakov line correlations in the Higgs and confinement regions of the 3d SU(2) Higgs model. In the confinement phase we find a dense spectrum of bound states approximately split into two disjoint sectors. One consists of W-balls nearly identical to the glueball spectrum of the pure gauge theory...
We calculate analytically the exact dynamical response of a droplet of N interacting electrons in a quantum dot with an arbitrarily time-dependent parabolic confinement potential ω(t) and a perpendicular magnetic field. We find that, for certain frequency ranges, a sinusoidal perturbation acts like an attractive effective interaction between electrons. In the absence of a timeaveraged confineme...
Although self-assembled quantum dots are grown on wetting layers, most simulations exclude the wetting layer. The neglected effects on the electronic structure of a pyramidal InAs quantum dot embedded in a GaAs matrix are investigated based on the effective one electronic band Hamiltonian, the energy and position dependent electron effective mass approximation, and a finite height hard-wall 3D ...
We demonstrate a room-temperature strong quantum confinement Stark effect (QCSE) in Ge/SiGe multiple quantum wells (MQW) heterostructures, embedded in PIN diode. The device is designed to operate at 1.3μm, and QCSE is shown by photocurrent measurement in a surface illuminated device.
We propose a novel method for trapping Bose-condensed atoms using a white-light interference fringe. Confinement frequencies of tens of kHz can be achieved in conjunction with trap depths of only a few µK. We estimate that lifetimes on the order of 10 s can be achieved for small numbers of atoms. The tight confinement and shallow depth permit tunneling processes to be used for studying interact...
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