* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Quantum dots and radio-frequency electrometers in silicon
Density matrix wikipedia , lookup
Probability amplitude wikipedia , lookup
Coherent states wikipedia , lookup
Theoretical and experimental justification for the Schrödinger equation wikipedia , lookup
Quantum field theory wikipedia , lookup
Double-slit experiment wikipedia , lookup
Atomic theory wikipedia , lookup
Renormalization wikipedia , lookup
Particle in a box wikipedia , lookup
Renormalization group wikipedia , lookup
Many-worlds interpretation wikipedia , lookup
Quantum fiction wikipedia , lookup
Atomic orbital wikipedia , lookup
Quantum entanglement wikipedia , lookup
Spin (physics) wikipedia , lookup
Orchestrated objective reduction wikipedia , lookup
Quantum computing wikipedia , lookup
Quantum teleportation wikipedia , lookup
Interpretations of quantum mechanics wikipedia , lookup
Canonical quantization wikipedia , lookup
Relativistic quantum mechanics wikipedia , lookup
Quantum machine learning wikipedia , lookup
Electron scattering wikipedia , lookup
Quantum group wikipedia , lookup
Bell's theorem wikipedia , lookup
Electron configuration wikipedia , lookup
Quantum key distribution wikipedia , lookup
History of quantum field theory wikipedia , lookup
Symmetry in quantum mechanics wikipedia , lookup
Quantum dot wikipedia , lookup
Hidden variable theory wikipedia , lookup
Quantum electrodynamics wikipedia , lookup
EPR paradox wikipedia , lookup
Quantum dots and radio-frequency electrometers in silicon Dr Andrew Ferguson Cavendish Laboratory, University of Cambridge An important goal for solid-state quantum computing is to confine a single electron in silicon, then manipulate and subsequently determine its spin state. Silicon has a low nuclear spin density which, together with the low spin-orbit coupling in this material, is expected yield very long spin relaxation times. I will present recent results on silicon quantum dots with tuneable tunnel barriers. Lowtemperature electrical transport measurements are performed in both the many electron (N~100) and the few electron (N~10) regimes. In the second part of this talk, I will discuss the same device geometry but now configured as a radio-frequency electrometer. With the quantum dot embedded in a resonant tank circuit charge, charge sensitivities of dq<10-5 eHz-0.5 are demonstrated with MHz bandwidth. This performance is comparable to aluminium radio-frequency single electron transistors. Future aims are to perform charge sensing measurements on the quantum dot with the radiofrequency electrometer, and to engineer the quantum dot towards the single electron level. In addition, I will discuss the potential of the radio-frequency electrometer to measure single dopant atoms in silicon.