Single-shot readout of electron spin states in a quantum dot using spin-dependent tunnel rates

Real-time detection of single-electron tunneling using a quantum point contact

We observe individual tunnel events of a single electron between a quantum dot and a reservoir, using a nearby quantum point contact (QPC) as a charge meter. The QPC is capacitively coupled to the dot, and the QPC conductance changes by about 1% if the number of electrons on the dot changes by one. The QPC is voltage biased and the current is...

Excited-state spectroscopy on a nearly closed quantum dot via charge detection

We demonstrate a method for measuring the discrete energy spectrum of a quantum dot connected very weakly to a single lead. A train of voltage pulses applied to a metal gate induces tunneling of electrons between the quantum dot and a reservoir. The effective tunnel rate depends on the number and nature of the energy levels in the dot made...

Semiconductor few-electron quantum dot operated as a bipolar spin filter

Measurement Efficiency and n-Shot Readout of Spin Qubits

Few-electron quantum dot circuit with integrated charge read out

Electron transport through double quantum dots

Zeeman Energy and Spin Relaxation in a One-Electron Quantum Dot

Electromagnetic Aharonov-Bohm effect in a two-dimensional electron gas ring

Fabrication and low-temperature transport properties of selectively grown dual-gated single-electron transistors

We report on the fabrication of a dual-gated single-electron transistor (SET) based on a quantum dot (QD) formed by selective area growth of metalorganic vapor-phase epitaxy, and its low-temperature transport properties. We observe clear Coulomb oscillations in a SET fabricated in combination with direct growth of nanostructures and...

Two-stage kondo effect in a quantum dot at a high magnetic field

Out-of-equilibrium kondo effect in a mesoscopic device

Electron cotunneling in a semiconductor quantum dot