Results 31 to 40 of about 48,619 (333)

Sensing the quantum limit in scanning tunnelling spectroscopy

Nature Communications, 2016
The tunnelling current in scanning tunnelling spectroscopy has often been treated by a continuous charge flow, which lacks proper treatment of charge quantization. Here, Ast et al.
Christian R. Ast, Berthold Jäck, Jacob Senkpiel, Matthias Eltschka, Markus Etzkorn, Joachim Ankerhold, Klaus Kern   +6 more
doaj   +1 more source

Fermi edge singularities in transport through lateral GaAs quantum dots

New Journal of Physics, 2017
We measure tunnelling currents through electrostatically defined quantum dots in a GaAs/AlGaAs heterostructure connected to two leads. For certain tunnelling barrier configurations and high sample bias we find a pronounced resonance associated with a ...
Tobias Krähenmann, Livio Ciorciaro, Christian Reichl, Werner Wegscheider, Leonid Glazman, Thomas Ihn, Klaus Ensslin   +6 more
doaj   +1 more source

Large effects from small QCD instantons: making soft bombs at hadron colliders

Journal of High Energy Physics, 2020
It is a common belief that the last missing piece of the Standard Model of particles physics was found with the discovery of the Higgs boson at the Large Hadron Collider.
Valentin V. Khoze, Frank Krauss, Matthias Schott   +2 more
doaj   +1 more source

Microwave-induced conductance replicas in hybrid Josephson junctions without Floquet—Andreev states

Nature Communications, 2023
Light–matter coupling allows control and engineering of complex quantum states. Here we investigate a hybrid superconducting–semiconducting Josephson junction subject to microwave irradiation by means of tunnelling spectroscopy of the Andreev bound state
Daniel Z. Haxell, Marco Coraiola, Deividas Sabonis, Manuel Hinderling, Sofieke C. ten Kate, Erik Cheah, Filip Krizek, Rüdiger Schott, Werner Wegscheider, Wolfgang Belzig, Juan Carlos Cuevas, Fabrizio Nichele   +11 more
doaj   +1 more source

Analysis of dynamical tunnelling experiments with a Bose-Einstein condensate [PDF]

, 2004
Dynamical tunnelling is a quantum phenomenon where a classically forbidden process occurs, that is prohibited not by energy but by another constant of motion.
A. Mouchet, A. S. Parkins, C. Cohen-Tannoudji, D. Delande, H. Rubinsztein-Dunlop, J. R. Klauder, M. V. Berry, N. Heckenberg, N. W. Ashcroft, P. Julienne, V. I. Arnold, W. Hensinger   +11 more
core   +4 more sources

Quantum Corrected Non-Thermal Radiation Spectrum from the Tunnelling Mechanism

Galaxies, 2015
The tunnelling mechanism is today considered a popular and widely used method in describing Hawking radiation. However, in relation to black hole (BH) emission, this mechanism is mostly used to obtain the Hawking temperature by comparing the probability ...
Subenoy Chakraborty, Subhajit Saha, Christian Corda   +2 more
doaj   +1 more source

An open quantum systems approach to proton tunnelling in DNA

Communications Physics, 2022
The genetic stability of DNA suffers from proton transfer along the hydrogen bonds that can lead to tautomerisation, creating mutations. The authors theoretically examine the tautomerisation of the GuanineCytosine (G-C) nucleotide base-pair using an open
Louie Slocombe, Marco Sacchi, Jim Al-Khalili   +2 more
doaj   +1 more source

Microwave spectroscopy on a double quantum dot with an on-chip Josephson oscillator

, 2000
We present measurements on microwave spectroscopy on a double quantum dot with an on-chip microwave source. The quantum dots are realized in the two-dimensional electron gas of an AlGaAs/GaAs heterostructure and are weakly coupled in series by a ...
, A V Ustinov, A W Holleitner, B Irmer, F Simmel, H Qin, J P Kotthaus, K Eberl, Qin H, R H Blick   +9 more
core   +1 more source

Quantum tunneling with global charge [PDF]

Physical Review D, 1994
We investigate quantum tunneling in the theory of a complex scalar field with a global $U(1)$ symmetry when the charge density of the initial configuration does not vanish. We discuss the possible final configurations and set up the Euclidean path integral formalism to find the bubble nucleation and to study the bubble evolution.
openaire   +3 more sources

Tunnelling Studies of Two-Dimensional States in Semiconductors with Inverted Band Structure: Spin-orbit Splitting, Resonant Broadening

, 1996
The results of tunnelling studies of the energy spectrum of two-dimensional (2D) states in a surface quantum well in a semiconductor with inverted band structure are presented.
A. V. Germanenko, A. V. Germanenko, B. Freytag, C. A. Hoffman, D. C. Tsui, D. C. Tsui, E. Böckenhoff, F. J. Ohkawa, G. C. La Rocca, G. L. Bir, G. M. Minkov, G. M. Minkov, G. M. Minkov, G. M. Minkov, I. Nachev, J. Müller, J. R. Meyer, J. Slinkman, L. G. Gerchikov, L. P. Zverev, L. P. Zverev, M. I. Dyakonov, M. V. Kisin, O. E. Rut, P. Bauernschmitt, Pawel Sobkowicz, R. A. Suris, R. Sizmann, R. Stepniewski, R. Winkler, R. Wollrab, V. A. Larionova, V. F. Radantsev, V. F. Radantsev, V. F. Radantsev, Y. A. Bychkov, Y. R. Lin-Liu   +36 more
core   +1 more source