Quantum control of a model qubit based on a multi-layered quantum dot

ALEJANDRO FERRÓN; PABLO SERRA; OMAR OSENDA

JOURNAL OF APPLIED PHYSICS

AMER INST PHYSICS

Lugar: New York; Año: 2013 vol. 113 p. 134304 - 134304

0021-8979

In this work we present a model qubit whose basis states are eigenstates of a multi-layeredquantum dot. We show that the proper design of the quantum dot results in qubit states that haveexcellent dynamical properties when a time-dependent driving is applied to it. In particular, it isshown that a simple sinusoidal driving is sufficient to obtain good quality Rabi oscillationsbetween the qubit states. Moreover, the switching between states can be performed with very lowleakage, even under off-resonance conditions. In this sense, the quantum control of the qubit isrobust under some perturbations and achieved with simple means. More precisely, in this article,we propose a device that is within the reach of current semiconductor technology, a ZnS/CdSe/ZnS/CdSe/ZnS layered quantum dot. In addition, in order to clarify, we show a more generaland theoretical model, which we believe is helpful in order to search the ideal experimental device.