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12 papers · 2 filters
Dephasing of a superconducting qubit induced by photon noise
P. Bertet, I. Chiorescu, G. Burkard +4
We have studied the dephasing of a superconducting flux-qubit coupled to a DC-SQUID based oscillator. By varying the bias conditions of both circuits we were able to tune their eff…
Experimental demonstration of the time reversal Aharonov-Casher effect
Tobias Bergsten, Toshiyuki Kobayashi, Yoshiaki Sekine +1
We demonstrate the time reversal Aharonov-Casher (AC) effect in small arrays of mesoscopic semiconductor rings. By using an electrostatic gate we can control the spin precession ra…
Coherent single electron spin control in a slanting Zeeman field
Yasuhiro Tokura, Wilfred G. van der Wiel, Toshiaki Obata +1
We consider a single electron in a 1D quantum dot with a static slanting Zeeman field. By combining the spin and orbital degrees of freedom of the electron, an effective quantum tw…
Fine structure and magneto-optics of exciton, trion, and charged biexciton states in single InAs quantum dots emitting at 1.3 um
N. I. Cade, H. Gotoh, H. Kamada +2
We present a detailed investigation into the optical characteristics of individual InAs quantum dots (QDs) grown by metalorganic chemical vapor deposition, with low temperature emi…
Tunable Kondo screening in a quantum dot device
Hiroyuki Tamura, Leonid I. Glazman
We consider electron transport along a single-mode channel which is in contact, via tunnel junctions in its walls, with two quantum dots. Electron tunneling to and from the dots co…
Pauli spin blockade in cotunneling transport through a double quantum dot
H. W. Liu, T. Fujisawa, T. Hayashi +1
We study spin correlation in a double quantum dot containing a few electrons in each dot (around 10). Clear current rectification with negative differential conductance is observed…