Proceedings of the 1st International Conference on Experimental Implementation of Quantum Computation: Sydney, Australia, 16-19 January 2001

R G Clark1589490134, 9781589490130

This work presents reports of developments in the experimental implementation of quantum computer proposals worldwide. It also includes theoretical investigations relevant to the various computer architectures, implementation strategies and computer operation. The reports provide a framework that sets out both the challenges of the various experimental proposals together with progress that has been made in overcoming these challenges.

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Table of contents :
CONTENTS……Page 14
Preface……Page 8
Martti Mikael Salomaa (1946-2004)……Page 15
1. Introduction……Page 17
2. DiVincenzo Criteria……Page 18
4. ARDA QIST Roadmap……Page 22
5. Beyond DiVincenzo Criteria……Page 27
6. Summary……Page 28
References……Page 29
1. Introduction……Page 30
2. Charge qubit in a double quantum dot……Page 31
3. Electron spin qubit……Page 40
4. Summary……Page 48
References……Page 49
Superconducting Quantum Computing: Status and Prospects……Page 52
1. Why Josephson qubits?……Page 53
2. Solid-state quantum computation……Page 54
3. Superconductivity and the Josephson effect……Page 55
4. Superconducting quantum junctions……Page 58
5. Different types of superconducting qubits……Page 59
6. Experimental achievements……Page 71
7. Decoherence……Page 80
8. Coupled qubits and beyond……Page 104
9. Summary……Page 112
References……Page 115
1. Introduction……Page 122
2. Experimental setup……Page 123
3. Preparing GHZ- and W-states……Page 124
4. Projection of the quantum states by measurement……Page 127
5. Selective read-out of a quantum register……Page 128
6. Conditioned single qubit operations……Page 130
7. Teleportation……Page 131
References……Page 138
1. Introduction……Page 141
2. NMR Primer……Page 142
3. Hamiltonians for two-qubit molecules……Page 154
4. Density matrix for two spins……Page 164
5. Quantum computation……Page 173
6. DiVincenzo criteria……Page 194
References……Page 197
1. Introduction……Page 199
2. Single-photon quantum computation: processing using only linear optics……Page 205
3. Continuous variables……Page 221
4. Hybrid schemes: combining single photon logic and continuous variables……Page 226
5. Bell state measurements……Page 235
6. A resource-efficient CNOT gate……Page 237
7. Concluding discussion: is optical computation possible?……Page 240
References……Page 245