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davepamn davepamn
 

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 M¢25  Funded By Mahalo ? |  June 18, 2009 02:17 PM

Is adiabatic quantum computing, a quantum computer?

How many qubits are required for useful applications?

What real world problems could an quantum computer solve?
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mahaloguru mahaloguru
 
 June 18, 2009 06:00 PM
So I think It is very important to pay attention to the terms used.

A computer is a machine that manipulates data according to a set of instructions , Computing is usually defined as the activity of using and developing computer technology, computer hardware and software or as a general term for any type of information processing.

ERGO

An adiabatic quantum COMPUTING IS NOT a quantum COMPUTER!!!
but it is right to say that a quantum computer is a device for computation !!!

A quantum computer shoud be very fast compared to a bit based computer.
Just think that for normal applications it's enought ENOUGHT a 10 qubit computer with more qubits could be possible to break a bank code in seconds...

A quantum computer could solve mathematics and physics complex problems...theorycally any kind of problem...so any kind of data manipulation in real time .. all over the world ... could be also be used in metheorology,astrology,and any kind of prediction..or analysis.... could also be usefull to find the principle that is at the base of the universe.. could also be able to complete the string theory.... etc etc
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davepamn davepamn
 
June 18, 2009 06:09 PM
If adiabatic computer has a functional qubit so your statement must be wrong. Qubit exists therefore QC exists. The existence of a functional qubit makes the adiabatic machine an QC.

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davepamn davepamn
 
June 19, 2009 03:21 PM
http://tjoresearchnotes.wordpress.com/2009/02/24/matt-hastings-adiabatic-quantum-computation-with-long-paths/

1. The goal is to use quantum affects to create a form of computational power.
2. QC can make errors and algorithms need to be created that correct the errors.
3. Quantum mechanics is leading to a systematic exploitation of materials at a subatomic scale: transistor, laser, and solid state.
4. All proposals for doing quantum computing have the following sequence of steps: 1. Initialize the system 2. evolve it under some Hamiltonian 3. and then you measure something to get your answer.
5. Measurement steps in between could be model by Hamiltonian dynamics in a larger Hilbert space. So, everything in QC is creating a state, evolve, and then measure.
6. In Adiabatic QC, you evolve the system under a time-dependent Hamiltonian. Two constraints are your initial ground state and the Hamiltonian changes very slowly in time, so for all times your quantum state remains close to the ground state.

The problem with adiabatic computing is that the states evolve slowly.

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mahaloguru mahaloguru
 
June 19, 2009 06:07 PM
how slowly?

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davepamn davepamn
 
June 19, 2009 06:59 PM
I don't know.

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