TY - JOUR
AB - Standard quantum computation is based on sequences of unitary quantum logic gates that process qubits. The one-way quantum
computer proposed by Raussendorf and Briegel is entirely different. It has changed our understanding of the requirements for
quantum computation and more generally how we think about quantum physics. This new model requires qubits to be initialized in
a highly entangled cluster state. From this point, the quantum computation proceeds by a sequence of single-qubit measurements
with classical feedforward of their outcomes. Because of the essential role of measurement, a one-way quantum computer is
irreversible. In the one-way quantum computer, the order and choices of measurements determine the algorithm computed. We
have experimentally realized four-qubit cluster states encoded into the polarization state of four photons. We characterize the
quantum state fully by implementing experimental four-qubit quantum state tomography. Using this cluster state, we demonstrate
the feasibility of one-way quantum computing through a universal set of one- and two-qubit operations. Finally, our
implementation of Grover’s search algorithm demonstrates that one-way quantum computation is ideally suited for such tasks.
AU - Resch, K. J.
AU - Walther, P.
AU - Brukner, Č.
AU - Steinberg, A.
AU - Pan, J.
AU - Zeilinger, A.
DA - 2005/01/01/
JF - Physical Review Letters
PY - 2005
SE - 2005/01/01/
TI - Quantum nonlocality obtained from local states by entanglement purification
ER -