Distributed quantum information processing via single atom driving

Single photons for quantum information processing

What are light quanta? Nowadays every Tom, Dick and Harry thinks he knows it, but he is mistaken.

Quantum-information processing via a lossy bus

We describe a method to perform two-qubit measurements and logic operations on pairs of qubits which each interact with a harmonic oscillator degree of freedom the bus , but do not directly interact with one another. Our scheme uses only weak interactions between the qubit and the bus, homodyne measurements, and single-qubit operations. In contrast to earlier schemes, the technique presented he...

Quantum Information Processing with Single Photons

Photons are natural carriers of quantum information due to their ease of distribution and long lifetime. This thesis concerns various related aspects of quantum information processing with single photons. Firstly, we demonstrate N -photon entanglement generation through a generalised N×N symmetric beam splitter known as the Bell multiport. A wide variety of 4-photon entangled states as well as ...

Quantum Transport and Quantum Information Processing in Single Molecular Junctions

Implementation of Single-Qutrit Quantum Gates via Tripod Adiabatic Passage

We proposed and analyzed implementation of the single-qutrit quantum gates based on stimulated Raman adiabatic passage (STIRAP) between magnetic sublevels in atoms coupled by pulsed laser fields. This technique requires only the control of the relative phase of the driving fields but do not involve any dynamical or geometrical phases, which make it independent of the other interaction details: ...