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For questions about physical implementations of a quantum algorithm or other quantum information protocol. DO NOT use for questions about simulation or emulation of quantum computers, or cloud-based quantum computing services like the IBM Q Experience.
7
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4
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How is a single qubit fundamentally different from a classical coin spinning in the air?
I had asked this question earlier in the comment section of the post: What is a qubit? but none of the answers there seem to address it at a satisfactory level.
The question basically is:
How is …
37
votes
1
answer
15k
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How are quantum gates implemented in reality?
Quantum gates seem to be like black boxes. Although we know what kind of operation they will perform, we don't know if it's actually possible to implement in reality (or, do we?). In classical compute …
44
votes
3
answers
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How does a quantum computer do basic math at the hardware level?
On reading this Reddit thread I realized that even after a couple months of learning about quantum computing I've absolutely no clue about how a quantum computer actually works.
To make the question …
25
votes
3
answers
4k
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Why do optical quantum computers not have to be kept near absolute zero while superconductin...
This is a follow-up question to @heather's answer to the question : Why must quantum computers be kept near absolute zero?
What I know:
Superconducting quantum computing: It is an implementation of …