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8 papers · 2 filters
Quantum Computation with Coherent States, Linear Interactions and Superposed Resources
T. C. Ralph, W. J. Munro, G. J. Milburn
We show that quantum computation circuits with coherent states as the logical qubits can be constructed using very simple linear networks, conditional measurements and coherent sup…
Weak force detection with superposed coherent states
W. J. Munro, K. Nemoto, G. J. Milburn +1
We investigate the utility of non classical states of simple harmonic oscillators, particularly a superposition of coherent states, for sensitive force detection. We find that like…
Simple Scheme for Efficient Linear Optics Quantum Gates
T. C. Ralph, A. G. White, W. J. Munro +1
We describe the construction of a conditional quantum control-not (CNOT) gate from linear optical elements following the program of Knill, Laflamme and Milburn [Nature {\bf 409}, 4…
Typical entanglement in multi-qubit systems
Vivien M Kendon, Kae Nemoto, William J Munro
Quantum entanglement and its paradoxical properties hold the key to an information processing revolution. Much attention has focused recently on the challenging problem of characte…
The Bell Inequality and Entanglement
W. J. Munro, K. Nemoto, A. G. White
Entanglement is a critical resource used in many current quantum information schemes. As such entanglement has been extensively studied in two qubit systems and its entanglement na…
On the Measurement of Qubits
Daniel F. V. James, Paul G. Kwiat, William J. Munro +1
We describe in detail the theory underpinning the measurement of density matrices of a pair of quantum two-level systems (``qubits''). Our particular emphasis is on qubits realized…
Mixed State Entanglement: Manipulating Polarisation-Entangled Photons
R. T. Thew, W. J. Munro
There has been much discussion recently regarding entanglement transformations in terms of local filtering operations and whether the optimal entanglement for an arbitrary two-qubi…
Verifying Atom Entanglement Schemes by Testing Bell's Inequality
Dimitris G. Angelakis, Almut Beige, Peter L. Knight +2
Recent experiments to test Bell's inequality using entangled photons and ions aimed at tests of basic quantum mechanical principles. Interesting results have been obtained and many…