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The quantum computing tag is relevant for computing that uses quantum states such as superposition and/or entanglement to locate low energy states as solutions to complex problems (rather than laboriously enumerating and checking solutions as would be done with non-quantum traditional computing).
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Shor's algorithm entanglement verification
I would like to ask whether the entanglement verification is necessary in Shor's algorithm
In the paper, Nature Photon 6, 773–776 (2012), they mentioned that they tried to factorize 21 to avoid the en …
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Number of qubits required in Shor's algorithm
People say that the number of qubits required in Shor's algorithm for factorizing $N$ should be
$2\log N$ for control register and $\log N$ for target register.
What is the reason why these numbers of …