Results 1 to 10 of about 304,400 (401)

A quantum point contact for neutral atoms [PDF]

Physical Review Letters 83 (19), 3762 (1999), 1999
We show that the conductance of neutral atoms through a tightly confining waveguide constriction is quantized in units of lambda_dB^2/pi, where lambda_dB is the de Broglie wavelength of the incident atoms. Such a constriction forms the atom analogue of an electron quantum point contact and is an example of quantum transport of neutral atoms in an ...
A. Yacoby, B. J. van Wees, C. V. Sukumar, C. W. J. Beenakker, C. Waschke, D. A. Wharam, D. H. Dunlap, D. P. E. Smith, E. A. Hinds, E. A. Montie, E. E. Mendez, E. W. Hagley, H. Monien, H. van Houten, I. Bloch, J. D. Weinstein, J. H. Thywissen, J. H. Thywissen, J. K. Gimzewski, J. M. Krans, J. Schmiedmayer, K. Szymaniec, K. W. Madison, M. B. Dahan, M. Drndić, M. Olshanii, M. Prentiss, M.-O. Mewes, P. S. Jessen, R. M. Westervelt, S. Frank, S. R. Wilkinson, T. M. Roach, Yu. V. Sharvin, Yu. V. Sharvin   +34 more
arxiv   +4 more sources

On transport in quantum Hall systems with constrictions [PDF]

Europhysics Letters, Vol. 80, 17003 (2007)., 2006
Motivated by recent experimental findings, we study transport in a simple phenomenological model of a quantum Hall edge system with a gate-voltage controlled constriction lowering the local filling factor. The current backscattered from the constriction is seen to arise from the matching of the properties of the edge-current excitations in the ...
Giamarchi Thierry, Kane C. L., Lal S., S. Lal, Yoshioka D.   +4 more
arxiv   +3 more sources

Transport through constricted quantum Hall edge systems: beyond the quantum point contact [PDF]

Phys. Rev. B 77, 035331 (2008), 2007
Motivated by surprises in recent experimental findings, we study transport in a model of a quantum Hall edge system with a gate-voltage controlled constriction. A finite backscattered current at finite edge-bias is explained from a Landauer-Buttiker analysis as arising from the splitting of edge current caused by the difference in the filling fractions
A. O. Gogolin, C. L. Kane, D. Yoshioka, M. Büttiker, M. P. A. Fisher, S. Datta, S. Lal, S. Oberholzer, S. Roddaro, Siddhartha Lal, Thierry Giamarchi, Y. Imry   +11 more
arxiv   +3 more sources

Microscopic Theory of Josephson Mesoscopic Constrictions [PDF]

, 1993
We present a microscopic theory for the d.c. Josephson effect in model mesoscopic constrictions. Our method is based on a non-equilibrium Green function formalism which allows for a self-consistent determination of the order parameter profile along the constriction. The various regimes defined by the different length scales (Fermi wavelength $\lambda_F$
A. Furusaki, A. Katalsky, A. Levy Yeyati, A. Levy Yeyati, A. Martín Rodero, A. Martín-Rodero, C. Nguyen, C.J. Muller, C.W.J. Beenakker, C.W.J. Beenakker, F. J. García-Vidal, G.B. Arnold, G.E. Blonder, J. Ferrer, J.L. D'Amato, K.K. Likharev, K.K. Likharev, L. Kramer, L.G. Aslamazov, L.V. Keldysh, M. Buttiker, N. Agrait, N. Agrait, O. Kulik, O. Kulik, O. Kulik, P. L. Pernas, V. Ambegaokar, V. Ambegaokar, Y. Nambu   +29 more
arxiv   +3 more sources

Constriction of the Œsophagus [PDF]

The Boston Medical and Surgical Journal
n ...
Wm. A. Gillespie
openalex   +4 more sources

Andreev States in long shallow SNS constrictions [PDF]

, 2001
We study Andreev bound states in a long shallow normal constriction, which is open to a superconductor at both ends. The interesting features of such setup include the absence of electron-hole symmetry and the interference of electron waves along the constriction.
A. Lodder, Andreev, Andreev, Beenakker, Beenakker, Chtchelkatchev, Glazman, Glazman, Koperdraad, Kuhn, Kümmel, Larkin, Lodder, Nazarov, Otadoy, Yu.V. Nazarov, Ŝipr   +16 more
arxiv   +4 more sources

Controlling hysteresis in superconducting constrictions with a resistive shunt [PDF]

Fast Track Communications in Supercond. Sci. Technol. 28 (2015) 072003, 2015
We demonstrate control of the thermal hysteresis in superconducting constrictions by adding a resistive shunt. In order to prevent thermal relaxation oscillations, the shunt resistor is placed in close vicinity of the constriction, making the inductive current-switching time smaller than the thermal equilibration time.
Biswas, Sourav, Courtois, H., Gupta, Anjan K., Kumar, Nikhil, Winkelmann, C. B.   +4 more
arxiv   +5 more sources

Lattice Expansion in Seamless Bi layer Graphene Constrictions at High Bias [PDF]

Nano Lett. 2012, 12, 4455, 2012
Our understanding of sp2 carbon nanostructures is still emerging and is important for the development of high performance all carbon devices. For example, in terms of the structural behavior of graphene or bi-layer graphene at high bias, little to nothing is known. To this end we investigated bi-layer graphene constrictions with closed edges (seamless)
Barreiro, Amelia, Boerrnert, Felix, Buechner, Bernd, Katsnelson, Mikhail I., Ruemmeli, Mark H., Vandersypen, Lieven M. K., Wolf, Daniel   +6 more
arxiv   +4 more sources

On the origin of magnetization auto-oscillations in constriction-based spin Hall nano-oscillators [PDF]

Phys. Rev. Applied 9, 014017 (2018), 2017
We use micromagnetic simulations to map out and compare, the linear and auto-oscillating modes in constriction-based spin Hall nano-oscillators as a function of applied magnetic field with varying magnitude and out-of-plane angle. We demonstrate that for all possible applied field configurations the auto-oscillations emerge from the localized linear ...
M. Dvornik, A. Awad, J. Aakerman
arxiv   +3 more sources

Electron transport in bilayer graphene nano constrictions patterned using AFM nanolithography. [PDF]

Phys Rev B
Here we report on low temperature transport measurements of encapsulated bilayer graphene nano constrictions fabricated employing electrode-free AFM-based local anodic oxidation (LAO) nanolithography. This technique allows for the creation of constrictions as narrow as 20 nm much smaller than previous studies.
Rienstra RW, Sultana N, Shih EM, Stocker E, Watanabe K, Taniguchi T, Richter CA, Stroscio J, Zhitenev N, Ghahari F.   +9 more
europepmc   +2 more sources