Kueng, Bruno and Gustavsson, Simon and Choi, Theodore and Shorubalko, Ivan and Pfaeffli, Oliver and Hassler, Fabian and Blatter, Gianni and Reinwald, Matthias and Wegscheider, Werner and Schoen, Silke and Ihn, Thomas and Ensslin, Klaus (2010) Measurement Back-Action in Quantum Point-Contact Charge Sensing. ENTROPY, 12 (7). pp. 1721-1732. ISSN 1099-4300,
Full text not available from this repository. (Request a copy)Abstract
Charge sensing with quantum point-contacts (QPCs) is a technique widely used in semiconductor quantum-dot research. Understanding the physics of this measurement process, as well as finding ways of suppressing unwanted measurement back-action, are therefore both desirable. In this article, we present experimental studies targeting these two goals. Firstly, we measure the effect of a QPC on electron tunneling between two InAs quantum dots, and show that a model based on the QPC's shot-noise can account for it. Secondly, we discuss the possibility of lowering the measurement current (and thus the back-action) used for charge sensing by correlating the signals of two independent measurement channels. The performance of this method is tested in a typical experimental setup.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COULOMB-BLOCKADE; ELECTRON-SPIN; READ-OUT; DOTS; NOISE; quantum dots; quantum wires; noise; single-electron tunneling |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Jul 2020 08:55 |
| Last Modified: | 27 Jul 2020 08:55 |
| URI: | https://pred.uni-regensburg.de/id/eprint/24494 |
Actions (login required)
 |
View Item |
