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Anonymous
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Anonymous
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What size of Qunatum objects can be used to create the most astonishing machine of all time?
From photons,electrons to atoms and molecules ,the list is long but not endless.
Where the quantum property gets lost and why ?
If so much exist natuarally then why not this computer?
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Joined: Jan 2005
Posts: 375
Senior Member
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Senior Member
Joined: Jan 2005
Posts: 375 |
http://xxx.lanl.gov/abs/quant-ph/0508218 Repeat-Until-Success quantum computing using stationary and flying qubits
Authors: Yuan Liang Lim, Sean D. Barrett, Almut Beige, Pieter Kok, Leong Chuan Kwek
Comments: 14 pages, 7 figures, some added references
We introduce an architecture for robust and scalable quantum computation using both stationary qubits (e.g. single photon sources made out of trapped atoms, molecules, ions, quantum dots, or defect centers in solids) and flying qubits (e.g. photons). Our scheme solves some of the most pressing problems in existing non-hybrid proposals, which include the difficulty of scaling conventional stationary qubit approaches, and the lack of practical means for storing single photons in linear optics setups. We combine elements of two previous proposals for distributed quantum computing, namely the efficient photon-loss tolerant build up of cluster states by Barrett and Kok [Phys. Rev. A 71, 060310 (2005)] with the idea of Repeat-Until-Success (RUS) quantum computing by Lim et al. [Phys. Rev. Lett. 95, 030505 (2005)]. This idea can be used to perform eventually deterministic two-qubit logic gates on spatially separated stationary qubits via photon pair measurements. Under non-ideal conditions, where photon loss is a possibility, the resulting gates can still be used to build graph states for one-way quantum computing. In this paper, we describe the RUS method, present possible experimental realizations, and analyse the generation of graph states.
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Joined: Oct 2004
Posts: 540
Superstar
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Superstar
Joined: Oct 2004
Posts: 540 |
http://xxx.lanl.gov/abs/quant-ph/0508218 It's a proposal. I cheer them on! I remain skeptical until it is reduced to practice. As with controlled hot fusion, only a few little problems remain to be solved. One of those little problems is that the uncooperative real world refuses to behave according to theory. Economics is all about perfect mathematical models uncontrollably skidding through real world slop. Publications about heteroskedasticity won't factor large prime product trap door encryptions.
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Anonymous
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Anonymous
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With error correction the coherence can be sustained and we can expect more different types of objects(with atom level configuration) to behave Qunatum Mechanically.
Do you agree?
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Joined: Sep 2005
Posts: 32
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Joined: Sep 2005
Posts: 32 |
The idea here with quantum computing would be to get higher speeds though shorter paths: i.e. increased density. A single cosmic ray would be a disaster in this situation spraying out thousands of disturbing particals and photons. Error correction would have to be distributed over distances outside the cosmic ray distuction path thereby destroying any gain in computing speed. Small problem I am sure, I am just not going to invest in any stock in these companies.
Sparky
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Joined: Oct 2004
Posts: 427
Senior Member
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Senior Member
Joined: Oct 2004
Posts: 427 |
Originally posted by Uncle Al:
the uncooperative real world refuses to behave according to theory. Especially a pseudo-theory, as it is the case with quac e  s
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Anonymous
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Anonymous
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The answer to my question is yes.
It is possible.(I do not find any unconquerable obstacle in acheiving it.)
I was trying to find out how deep we can go on this topic, but it appears that we need to do some more study ,reasearch and thinking before such a conclusion can be made with certainity.
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