Year: 2005
Type: article
Abstract: The conductance $\mathcal{G}$ of an Aharonov-Bohm interferometer (ABI), with a strongly correlated quantum dot on one arm, is expressed in terms of the dot Green function, ${G}_{dd}$, the magnetic flux $\ensuremath{\phi}$ and the noninteracting parameters of the ABI ${{J}_{\ensuremath{\mu}\ensuremath{\nu}}}$. At $T=0$, Fermi liquid theory yields the exact $\ensuremath{\phi}$ dependence of $\mathcal{G}$. We show that one can extract ${G}_{dd}$ from the observed $\mathcal{G}(\ensuremath{\phi})$, for both closed and open ABI's. In the latter case, the phase shift $\ensuremath{\beta}$ deduced from $\mathcal{G}\ensuremath{\approx}A+B\phantom{\rule{0.2em}{0ex}}\mathrm{cos}(\ensuremath{\phi}+\ensuremath{\beta})$ depends strongly on the ${{J}_{\ensuremath{\mu}\ensuremath{\nu}}}$'s, and usually $\ensuremath{\beta}\ensuremath{\ne}\ensuremath{\pi}∕2$. The ${{J}_{\ensuremath{\mu}\ensuremath{\nu}}}$'s may also reduce the Kondo temperature.
Source: Physical Review B
Authors: Amnon Aharony, Ora Entin-Wohlman
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1996568206