Tunable-barrier Si single-electron tunneling (SET) devices give us the possibility of moving and manipulating single electrons. Through this control, we can form quantum dots that have just one electron on them and manipulate them in coherent and non-coherent ways. Our ultimate goal is to investigate charge and spin qubits in these devices. We are investigating such issues as: (1) What does it mean to open a switch (i.e., how do electrons make the transition from a delocalized cloud of continuous charge to discrete packets of charge)? (2) What are the possible advantages of tunable barrier devices, including the ability to form a dot with only one electron in the conduction band? (3) What are sources of decoherence (e.g., defect motion at the interfaces)?

 

key words

Nanoscale electronics; Quantum computing; Quantum information; Single-electron devices;

Citizenship:  Open to U.S. citizens

Level:  Open to Postdoctoral applicants