Quantum Point Contact
Nonzero temperature effects on antibunched photons emitted by a quantum point contact out of equilibrium
... single-channel quantum point contact can produce photons 共 at frequency close to the applied voltage V ⫻ e /ប兲 which inherit the sub-Poissonian statistics of the ...
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Quantum point contact as a probe of a topological superconductor
... a quantum point contact (QPC) in the normal region (N) at a distance d from the superconducting region (S), by discretizing the Hamiltonian on a square lattice (lattice constant a = l so / 40, with l ...
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The 0 7 Anomaly in Quantum Point Contact; Many Body or Single Electron Effect?
... Apart from usual quantization steps on the ballistic conductance of quasi-one-dimensional con- ductor, an additional plateau-like feature appears at a fraction of about 0.7 below the first con- ductance step in ...
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Oscillatory thermopower of a quantum point contact
... The voltage, which is measured using point contact voltage probes, is even in the current and shows strong oscillations äs the number of subbands in either one of the point contacts is v[r] ...
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Andreev reflection and the Josephson effect in a quantum point contact: An analogy with phase-conjugating resonators
... We discuss thc analogy betwccn thc axial mode spcctium of an optical resonator with one or two phase-conjugating mirrors, and the quasipaiticle excitation spectium ot an NS or SNS |uncti[r] ...
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The superconducting quantum point contact
... The critical current is discretized in units of eAo/ti, dependent on the energy gap ΔΟ of the bulk superconductor but not on the junction parameters.. To achieve this analogue of the c[r] ...
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Conductance enhancement in quantum point contact semiconductor superconductor devices
... Equation 共 3 兲 holds for an arbitrary disorder potential and is a multichannel generalization of a conductance formula first obtained by Blonder, Tinkham, and Klapwijk 22 who considered a delta function potential as a ...
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Thermo-electric properties of quantum point contacts
... We have used a current heating techniquef to ob- serve the characteristic quantum size effects in the thermo-electric properties of a quantum point contact. Our previous work on the quan[r] ...
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Gate-based single-shot readout of spins in silicon
... engineered quantum bus, have a small qubit footprint and are amenable to mass scale semiconductor fabrica- tion ...bouring quantum dot[16, 17] or an electron reservoir[18] allows qubit measurement by ...
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Waiting times of entangled electrons in normal-superconducting junctions
... We consider a normal-superconducting junction in order to investigate the effect of new physical ingredients on waiting times. First, we study the interplay between Andreev and specular scattering at the interface on the ...
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Heyder, Jan (2014): The 0.7 anomaly in quantum point contacts: a microscopic model for the first conductance step. Dissertation, LMU München: Fakultät für Physik
... where quantum effects start to ...the quantum hall effect [Laughlin (1981)], weak localization [Altshuler et ...a quantum point contact ...
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Conditioned spin and charge dynamics of a single electron quantum dot
... a quantum dot ...A quantum point contact (QPC) which transmits an electron current that depends on the charge but is insensitive to the spin dy- namics on the quantum dot is used to ...
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Quantum effects in thermal and thermo-electric transport in semiconductor nanostructures
... Using this technique, we have been able to observe the quantum size effects in the thermopower [4], Peltier coeffi- cient and thermal conductance [5] of a quantum point contact, äs well[r] ...
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Quantum Fractals and the Casimir Dark Energy Duality—The Road to a Clean Quantum Energy Nano Reactor
... do quantum calcula- tions without violating the uncertainty principles [108] ...to point out our own unjustified shortcomings ...then point in a systematic way to the undreamed of possibilities of ...
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Itinerant metamagnetism and magnetic inhomogeneity: a magnetic analogue of the superconducting Fulde Ferrell Larkin Ovchinnikov phase in Sr₃Ru₂O₇
... The environment in which electronic nematic behaviour has been most clearly seen is the two dimensional electron gas [25]. Here the nematic state is due to a ‘melting’ of charge modulated order. In semiconductor ...
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Body rock or lift off in flow
... the contact point. This point is first and foremost a geometrical point rather than a material one but analysis of the flow features in its neighbourhood supports the above ...
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Duality in Quantum Quenches and Classical Approximation Algorithms: Pretty Good or Very Bad
... We consider an instance with degree D, so that each bit participates in D terms in the problem. Previous work has shown that for odd K it is possible to obtain a nontrivial approximation of order 1/ √ D for MAX-K-LIN-2 ...
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Probing wavenumbers of current-induced excitations in point-contact experiments
... In conclusion, we have presented a new experimental technique which provides a means to vary the size of a mechanical point-contact in situ in a single experimental run. We have used the technique to ...
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Bell model with hidden variables and Bohr quantum postulate on the existence of indivisible quantum of action given by Planck constant h.
... typical quantum effects finds its proper expression in the circumstance that any attempt of subdividing the phe- nomena will demand a change in the experimental arrangement introducing new possibilities of ...
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Quantum gravity from the point of view of locally covariant quantum field theory
... covariance. Quantum field theory is traditionally based on the symmetry group of Minkowski space, the Poincaré ...symmetry. Quantum field theory on curved spacetime which might be considered as an ...
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