256 citations · 2.6k across the 81 of their papers we have counts for
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Absence of a dissipative quantum phase transition in Josephson junctions
Anil Murani, Nicolas Bourlet, Hélène le Sueur +7
Half a century after its discovery, the Josephson junction has become the most important nonlinear quantum electronic component at our disposal. It has helped reshape the SI system…
Theory of quantum-circuit refrigeration by photon-assisted electron tunneling
Matti Silveri, Hermann Grabert, Shumpei Masuda +2
We focus on a recently experimentally realized scenario of normal-metal-insulator-superconductor tunnel junctions coupled to a superconducting resonator. We develop a first-princip…
Cryogenic microwave source based on nanoscale tunnel junctions
Shumpei Masuda, Kuan Y. Tan, Matti Partanen +5
We experimentally realize an incoherent microwave source driven by voltage-controlled quantum tunneling of electrons through nanoscale normal-metal--insulator--superconductor junct…
Current Noise in Tunnel Junctions
Moritz Frey, Hermann Grabert
We study current fluctuations in tunnel junctions driven by a voltage source. The voltage is applied to the tunneling element via an impedance providing an electromagnetic environm…
Effect of the electromagnetic environment on current fluctuations in driven tunnel junctions
Moritz Frey, Hermann Grabert
We examine current fluctuations in tunnel junctions driven by a superposition of a constant and a sinusoidal voltage source. In standard setups the external voltage is applied to t…
Dynamical Coulomb blockade of tunnel junctions driven by alternating voltages
Hermann Grabert
The theory of dynamical Coulomb blockade is extended to tunneling elements driven by a time-dependent voltage. It is shown that for standard set-ups where an external voltage is ap…
The Nanoscale Free-Electron Model
D. F. Urban, J. Bürki, C. A. Stafford +1
A brief review of the nanoscale free-electron model of metal nanowires is presented. This continuum description of metal nanostructures allows for a unified treatment of cohesive a…
Tuning Excess Noise by Aharonov-Bohm Interferometry
Fabrizio Dolcini, Hermann Grabert
A voltage bias applied to a conductor induces a change of the current noise with respect to the equilibrium noise known as excess noise. We analyze the excess noise of the electron…
Feedback and Rate Asymmetry of the Josephson Junction Noise Detector
D. F. Urban, Hermann Grabert
The Josephson junction noise detector measures the skewness of non-Gaussian noise via the asymmetry of the rate of escape from the zero-voltage state upon reversal of the bias curr…
Josephson junction detector of non-Gaussian noise
Hermann Grabert
The measurement of higher order cumulants of the current noise generated by a nonlinear mesoscopic conductor using a Josephson junction as on-chip detector is investigated theoreti…
Electronic and atomic shell structure in aluminum nanowires
A. I. Mares, D. F. Urban, J. Bürki +3
We report experiments on aluminum nanowires in ultra-high vacuum at room temperature that reveal a periodic spectrum of exceptionally stable structures. Two "magic" series of stabl…
Scaling Theory of the Peierls-CDW in Metal Nanowires
D. F. Urban, C. A. Stafford, Hermann Grabert
The Peierls instability in multi-channel metal nanowires is investigated. Hyperscaling relations are established for the finite-size-, temperature-, and wavevector-scaling of the e…
Stability and Symmetry Breaking in Metal Nanowires
D. F. Urban, J. Bürki, C. A. Stafford +1
A general linear stability analysis of simple metal nanowires is presented using a continuum approach which correctly accounts for material-specific surface properties and electron…
How to detect the fourth order cumulant of electrical noise
Joachim Ankerhold, Hermann Grabert
It is proposed to measure the current noise generated in a mesoscopic conductor by macroscopic quantum tunneling (MQT) in a current biased Josephson junction placed in parallel to…
Electronic shell effects and the stability of alkali nanowires
D. F. Urban, J. Bürki, A. I. Yanson +4
Experimental conductance histograms for Na nanowires are analyzed in detail and compared to recent theoretical results on the stability of cylindrical and elliptical nanowires, usi…
Jahn-Teller Distortions and the Supershell Effect in Metal Nanowires
D. F. Urban, J. Bürki, C. -H. Zhang +2
A stability analysis of metal nanowires shows that a Jahn-Teller deformation breaking cylindrical symmetry can be energetically favorable, leading to stable nanowires with elliptic…
Interplay of Rayleigh and Peierls Instabilities in Metallic Nanowires
D. F. Urban, Hermann Grabert
A quantum-mechanical stability analysis of metallic nanowires within the free-electron model is presented. The stability is determined by an interplay of electron-shell effects, th…
Inelastic electron relaxation rates caused by Spin M/2 Kondo Impurities
Georg Goeppert, Hermann Grabert
We study a spin S=M/2--Kondo system coupled to electrons in an arbitrary nonequilibrium situation above Kondo temperature. Coupling to hot electrons leads to an increased inverse l…
Enhancement of Macroscopic Quantum Tunneling by Landau-Zener Transitions
Joachim Ankerhold, Hermann Grabert
Motivated by recent realizations of qubits with a readout by macroscopic quantum tunneling in a Josephson junction, we study the problem of barrier penetration in presence of coupl…
Tunneling Density of States of the Interacting Two-Dimensional Electron Gas
Joerg Rollbuehler, Hermann Grabert
We investigate the influence of electron--electron interactions on the density of states of a ballistic two--dimensional electron gas. The density of states is determined nonpertur…
Long wavelength spatial oscillations of high frequency current noise in 1D electron systems
B. Trauzettel, H. Grabert
Finite frequency current noise is studied theoretically for a 1D electron system in presence of a scatterer. In contrast to zero frequency shot noise, finite frequency noise shows…
Cohesion, Conductance, and Charging Effects in a Metallic Nanocontact
C. A. Stafford, F. Kassubek, J. Bürki +2
The conducting and thermodynamic properties of ballistic metallic nanocontacts with smooth shapes are investigated. All properties are related to the electronic scattering matrix,…
Cohesion and Stability of Metal Nanowires: A Quantum Chaos Approach
C. A. Stafford, F. Kassubek, H. Grabert
A remarkably quantitative understanding of the electrical and mechanical properties of metal wires with a thickness on the scale of a nanometer has been obtained within the free-el…
Identification of Coulomb blockade and macroscopic quantum tunneling by noise
Hermann Grabert, Gert-Ludwig Ingold
The effects of Macroscopic Quantum Tunneling (MQT) and Coulomb Blockade (CB) in Josephson junctions are of considerable significance both for the manifestations of quantum mechanic…