vol 7: Notes
2005
Sunday 20 March
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... to restore theology to the mainstream of science
Notes
[Notebook: DB 57 Language]
[Sunday 20 March 2005 - Saturday 26 March 2005]
Sunday 20 March 2005
Monday 21 March 2005
[page 103]
Tuesday 22 March 2005
From a formal point of view a force is a channel which creates its effect by communicating information from the source of the force to its sink. Gauge theory says that the force and the effect that it produces are inverses and they sum to zero
[page 104]
(or multiply to 1, or the equivalent of a null operation in whatever algebra or arithmetic we are using (whatever algorithm)).
The error problem (and its solutions) are isomorphic (up to a transfinite transition) with the error problems of human government. They arise from interference from outside agents, such as other atoms, rebels, corruption, etc. Corruption can only be overcome by implementing adequate error correcting algorithms to the system of government (quantum computers)
Experimental one-way quantum computing Nature 434:169. Walther et al
'Because of the essential role of measurement, a one-way quantum computer is irreversible.'
Communication create irreversibility = creates entropy.
'In the one way computer the order and choices of measurements determine the algorithm computed.
MEASUREMENT = COMMUNICATION
Shannon tells us all communication comprise discrete (ie distinguishable) symbols.
Wednesday 23 March 2005
Thursday 24 March 2005
Friday 25 March 2005
Saturday 26 March 2005
Papers
| Walther, Philip and et al, "Experimental one-way quantum computing", Nature, 434, 7030, 10 March 2005, page 169-176. 'Standard quantum computing 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 initialised in a highly entangled cluster states. From this point on the 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 computer is irreversible. In the one-way quantum computer, the order and choices of measurements determine the algorithm computed. We have experimentally realised four-qubit cluster states encoded into the polarisation state of four photons. We characterise the quantum state by implementing experimental four-qubit quantum state tomography. Using this cluster state, we demonstrate the feasibility of one-way quantum computing through a univeral set of one- and two-qubit operations. Finally, our implementation of Grover's search algorithm demonstrates that one-way computation is ideally suited for such tasks. '. back |
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