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Qubit


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#1 Lode   Members   -  Reputation: 982

Posted 17 December 2012 - 02:58 PM

As far as I understand, there are two things required for qubits in quantum computing

1) They're entangled
2) A single qubit does not simply have on/off state, but instead its state is represented by two complex numbers

Point 1 is pretty crucial to quantum computing as far as I understand.

But point 2: this means that the state of a single qubit cannot be represented by an integer, but requires two complex numbers (and k entangled qubits require 2^k complex numbers)?

The question is: what precision is needed for the complex numbers (their real components), if you were to simulate qubits on a conventional computer?

Thanks.

Edited by Lode, 17 December 2012 - 03:09 PM.


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#2 SiCrane   Moderators   -  Reputation: 9597

Posted 17 December 2012 - 04:14 PM

You don't need super high precision to simulate a quantum computer. Existing simulation libraries use both single and double precision IEEE floats.




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