G.P.T. Lancaster

TL;DR: Deterministic quantum-state teleportation between a pair of trapped calcium ions is reported, demonstrating unequivocally the quantum nature of the process.

TL;DR: This work implements a CNOT quantum gate according to the Cirac–Zoller proposal, which relies on recently developed precise control of atomic phases and the application of composite pulse sequences adapted from nuclear magnetic resonance techniques.

TL;DR: This work exploits techniques developed for nuclear magnetic resonance to implement the Deutsch–Jozsa algorithm on an ion-trap quantum processor, using as qubits the electronic and motional states of a single calcium ion.

TL;DR: The deterministic creation of maximally entangled three-qubit states—specifically the Greenberger-Horne-Zeilinger (GHZ) state and the W state—with a trapped-ion quantum computer is reported and conditional operations controlled by the results from reading out one qubit are demonstrated.

TL;DR: This work reconstructs the density matrix of arbitrary atomic Bell states with two trapped ions using single qubit rotations and subsequent measurements with near-unity detection efficiency, and investigates the temporal decay of entanglement.