نتایج جستجو برای: quantum wire
تعداد نتایج: 324244 فیلتر نتایج به سال:
We develop a simple systematic method, valid for all strengths of disorder, to obtain analytically the full distribution of the conductance P g for a quasi-one-dimensional wire in the absence of electronelectron interactions. We show that in the crossover region between the metallic and insulating regimes P g is highly asymmetric, given by an essentially “one-sided” log-normal distribution. For...
We show that the conductance of a quantum wire side-coupled to a quantum dot, with a gate potential favoring the formation of a dot magnetic moment, is a universal function of the temperature. Universality prevails even if the currents through the dot and the wire interfere. We apply this result to the experimental data of Sato et al. [Phys. Rev. Lett. 95, 066801 (2005)]. Nanodevices owe much o...
Experimental studies are presented of a binary wire based on the quantum-dot cellular automata computational paradigm. The binary wire consists of capacitively coupled double-dot cells charged with single electrons. The polarization switch caused by an applied input signal in one cell leads to the change in polarization of the adjacent cell and so on down the line, as in falling dominos. Wire p...
We study the effect of Coulomb interactions on the conductance of a single-mode quantum wire connecting two bulk leads. When the density of electrons in the wire is very low, they arrange in a finite-length Wigner crystal. In this regime the electron spins form an antiferromagnetic Heisenberg chain with an exponentially small coupling J. An electric current in the wire perturbs the spin chain a...
An antenna model is proposed for long (L >> A) lasers with subwavelength cross sections (wire lasers). It is shown that the far-field pattern of the wire lasers is determined by the ratio of the wavelength to the length. The radiation of the wire laser is predicted to be concentrated in a narrow beam theta approximately radical(2lambda/L) for laser modes where the longitudinal phase velocity is...
H. Steinberg,1 O. M. Auslaender,1,* A. Yacoby,1 J. Qian,2 G. A. Fiete,2,3 Y. Tserkovnyak,2 B. I. Halperin,2 K. W. Baldwin,4 L. N. Pfeiffer,4 and K. W. West4 1Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel 2Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138, USA 3Kavli Institute for Theoretical Physics, University of Cali...
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