標題: Magnetic Qubit in a Non-Magnetic Semiconductor Quantum Dot Molecule
作者: Voskoboynikov, O.
Wijers, C. M. J.
交大名義發表
National Chiao Tung University
關鍵字: Quantum Dots;Magnetization;Magnetic Susceptibility;Qubit
公開日期: 1-Sep-2010
摘要: We consider a system of two vertical lens-shaped circular InAs/GaAs quantum dots when an external magnetic field is applied along the system's growth direction. The quantum dots have substantially different diameters in contrast to most of the known systems. We discuss a possibility to coherently drive coupled electronic ground states (to relocate electronic wave functions from one dot to another). This can be described as a manipulation of a magnetic iso-spin qubit. At the same time the relocation correlates with the anti-crossing behavior of the two lowest electronic states of the quantum dot molecule and generates unusual features of the magnetic susceptibility of the system. It follows from this theoretical study that in our non-magnetic system we can perform and monitor the magnetic qubit. The qubit can be dynamically driven by an external magnetic field and retraced from the magnetic susceptibility changes. A few single-qubit quantum gates can be performed.
URI: http://dx.doi.org/10.1166/jctn.2010.1536
http://hdl.handle.net/11536/32214
ISSN: 1546-1955
DOI: 10.1166/jctn.2010.1536
期刊: JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE
Volume: 7
Issue: 9
起始頁: 1723
結束頁: 1726
Appears in Collections:Articles