The canonical example of a quantum-mechanical two-level system is spin. The simplest
picture of spin is a magnetic moment pointing up or down. The full quantum properties of …

The rapid rise of spintronics and quantum information science has led to a strong interest in
develo** the ability to coherently manipulate electron spins. Electron spin resonance is a …

Semiconductor quantum dot molecules (QDMs) are systems composed of two or more
closely spaced and interacting QDs. QDMs are receiving much attention both as playground …

In this paper, we develop a nonperturbation theory for describing decoherence dynamics of
electron charges in a double quantum dot gated by electrodes. We extend the Feynman …

Individual and coupled quantum dots containing one or two electrons have been realized
and are regarded as components for future quantum information circuits. In this Letter we …

A serial triple quantum dot (TQD) electrostatically defined in a Ga As∕ Al Ga As
heterostructure is characterized by using a nearby quantum point contact as charge …

Scaling up quantum dots to two-dimensional (2D) arrays is a crucial step for advancing
semiconductor quantum computation. However, maintaining excellent tunability of quantum …

We introduce a Hubbard model as the simple quantum generalization of the classical
capacitance circuit model to study semiconductor quantum-dot spin qubits. We prove …

A kicked quantum nondemolition measurement is introduced, where a qubit is weakly
measured by pum** current. Measurement statistics are derived for weak measurements …

As an advanced quantum system, a three terminal triple quantum dot with one lead attached
to each dot allows us to simultaneously measure a transport along two different paths …