Zobrazeno 1 - 10
of 654
pro vyhledávání: '"Baranger, H. U."'
Autor:
Zhang, Xin H. H., Baranger, H. U.
Publikováno v:
Phys. Rev. A 97, 023813 (2018)
We obtain photon statistics by using a quantum jump approach tailored to a system in which one or two qubits are coupled to a one-dimensional waveguide. Photons confined in the waveguide have strong interference effects, which are shown to play a vit
Externí odkaz:
http://arxiv.org/abs/1710.01543
Autor:
Zhang, G., Chung, C. -H., Ke, C. T., Lin, C. -Y., Mebrahtu, H., Smirnov, A. I., Finkelstein, G., Baranger, H. U.
Publikováno v:
Phys. Rev. Research 3, 013136 (2021)
Nonequilibrium properties of correlated quantum matter are being intensively investigated because of the rich interplay between external driving and the many-body correlations. Of particular interest is the nonequilibrium behavior near a quantum crit
Externí odkaz:
http://arxiv.org/abs/1609.04765
Autor:
Mebrahtu, H. T., Borzenets, I. V., Zheng, H., Bomze, Y. V., Smirnov, A. I., Florens, S., Baranger, H. U., Finkelstein, G.
Publikováno v:
Nature Physics 9, 732 (2013)
We investigate experimentally an exotic state of electronic matter obtained by fine-tuning to a quantum critical point (QCP), realized in a spin-polarized resonant level coupled to strongly dissipative electrodes. Several transport scaling laws near
Externí odkaz:
http://arxiv.org/abs/1212.3857
Publikováno v:
Phys. Rev. B 82, 161411(R) (2010)
The concept of the "Kondo box" describes a single spin, antiferromagnetically coupled to a quantum dot with a finite level spacing. Here, a Kondo box is formed in a carbon nanotube interacting with a localized electron. We investigate the spins of it
Externí odkaz:
http://arxiv.org/abs/1010.1551
Publikováno v:
New J. Phys. 11, 095022 (2009)
We study the conductance through two types of graphene nanostructures: nanoribbon junctions in which the width changes from wide to narrow, and curved nanoribbons. In the wide-narrow structures, substantial reflection occurs from the wide-narrow inte
Externí odkaz:
http://arxiv.org/abs/0906.4351
Publikováno v:
Semicond. Sci. Technol. 25, 034003 (2010)
We study the conductance of mesoscopic graphene rings in the presence of a perpendicular magnetic field by means of numerical calculations based on a tight-binding model. First, we consider the magnetoconductance of such rings and observe the Aharono
Externí odkaz:
http://arxiv.org/abs/0904.3182
Publikováno v:
Phys. Rev. B 80, 035318 (2009)
We consider an "impurity" with a spin degree of freedom coupled to a finite reservoir of non-interacting electrons, a system which may be realized by either a true impurity in a metallic nano-particle or a small quantum dot coupled to a large one. We
Externí odkaz:
http://arxiv.org/abs/0901.0016
Publikováno v:
Phys. Rev. Lett. 102, 056806 (2009)
We study the symmetry classes of graphene quantum dots, both open and closed, through the conductance and energy level statistics. For abrupt termination of the lattice, these properties are well described by the standard orthogonal and unitary ensem
Externí odkaz:
http://arxiv.org/abs/0808.1008
Publikováno v:
Phys. Rev. B 80, 201302(R) (2009)
We study interaction-induced localization of electrons in an inhomogeneous quasi-one-dimensional system--a wire with two regions, one at low density and the other high. Quantum Monte Carlo techniques are used to treat the strong Coulomb interactions
Externí odkaz:
http://arxiv.org/abs/0807.4292
Publikováno v:
Phys. Rev. B 77, 041301(R) (2008)
We argue that Coulomb blockade phenomena are a useful probe of the cross-over to strong correlation in quantum dots. Through calculations at low density using variational and diffusion quantum Monte Carlo (up to r_s ~ 55), we find that the addition e
Externí odkaz:
http://arxiv.org/abs/0708.1304