Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Gurvitz, S. A."'
Publikováno v:
Phys. Rev. B 109 (2024) 195137
We present a non-standard Hubbard model applicable to arbitrary single-particle potential profiles and inter-particle interactions. Our approach involves a novel treatment of Wannier functions, free from the ambiguities of conventional methods and ap
Externí odkaz:
http://arxiv.org/abs/2307.16737
Autor:
Sokolovski, D., Gurvitz, S. A.
Publikováno v:
Scientific Reports, 9, Article number 7068 (2019)
We present a path analysis of the condition under which the outcomes of previous observation affect the results of the measurements yet to be made. It is shown that this effect, also known as "signalling in time", occurs whenever the earlier measurem
Externí odkaz:
http://arxiv.org/abs/1902.08060
Akademický článek
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Publikováno v:
Phys. Rev. B82, 245417 (2010)
The time evolution of a qubit, consisting of two single-level quantum dots, is studied in the presence of telegraph noise. The dots are connected by two tunneling paths, with an Aharonov-Bohm flux enclosed between them. Under special symmetry conditi
Externí odkaz:
http://arxiv.org/abs/1009.4228
Publikováno v:
PhysicaE 41, 1707-1711, 2009
Electron transport through two parallel quantum dots is a kind of solid-state realization of double-path interference. We demonstrate that the inter-dot Coulomb correlation and quantum coherence would result in strong current fluctuations with a dive
Externí odkaz:
http://arxiv.org/abs/0812.0846
Autor:
Sokolovski, D., Gurvitz, S. A.
We consider an electrostatic qubit located near a Bose-Einstein condensate (BEC) of noninteracting bosons in a double-well potential, which is used for qubit measurements. Tracing out the BEC variables we obtain a simple analytical expression for the
Externí odkaz:
http://arxiv.org/abs/0807.4440
Publikováno v:
EPL 88, 37001 (2009)
We show that the Coulomb blockade in parallel dots pierced by magnetic flux $\Phi$ completely blocks the resonant current for any value of $\Phi$ except for integer multiples of the flux quantum $\Phi_0$. This non-analytic (switching) dependence of t
Externí odkaz:
http://arxiv.org/abs/0803.1618
Autor:
Gurvitz, S. A.
Publikováno v:
Phys. Rev. B77, 201302(R) (2008)
The puzzling behavior of the transition phase through a quantum dot can be understood in a natural way via a formation of the electron molecule in the quantum dot. In this case the resonance tunneling takes place through the quasi-stationary (doorway
Externí odkaz:
http://arxiv.org/abs/0704.1260
Autor:
Gurvitz, S. A., Mozyrsky, D.
Publikováno v:
Phys. Rev. B77, 075325 (2008)
We consider an electrostatic qubit, interacting with a fluctuating charge of single electron transistor (SET) in the framework of exactly solvable model. The SET plays a role of the fluctuating environment affecting the qubit's parameters in a contro
Externí odkaz:
http://arxiv.org/abs/0704.0194
The frequency dependence of the equilibrium ac conductance (or the noise power spectrum) through a mesoscopic structure is shown to exhibit steps and dips. The steps, at energies related to the resonances of the structure, are closely related to the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0608406