An electrostatically defined serial triple quantum dot charged with few electrons

Abstract

A serial triple quantum dot (TQD) electrostatically defined in a GaAs/AlGaAs heterostructure is characterized by using a nearby quantum point contact as charge detector. Ground state stability diagrams demonstrate control in the regime of few electrons charging the TQD. An electrostatic model is developed to determine the ground state charge configurations of the TQD. Numerical calculations are compared with experimental results. In addition, the tunneling conductance through all three quantum dots in series is studied. Quantum cellular automata processes are identified, which are where charge reconfiguration between two dots occurs in response to the addition of an electron in the third dot.

12 pages, 9 figures

References in corpus (3)

• Coherent electronic transfer in quantum dot systems using adiabatic passage
• Direct control of the tunnel splitting in a one-electron double quantum dot
• Electrical readout of a spin qubit without double occupancy

Cited by in corpus (6)

• Two path transport measurements on a triple quantum dot
• A triple quantum dot in a single wall carbon nanotube
• Spatial adiabatic passage in a realistic triple well structure
• Telegraph Noise in Coupled Quantum Dot Circuits Induced by a Quantum Point Contact
• Production of multipartite entanglement for electron spins in quantum dots
• Discontinuous current-phase relations in small 1D Josephson junction arrays