qpe
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| - | # Quantum phase estimation | + | # QPE |
| **Quantum phase estimation** (QPE) is a quantum algorithm that estimates the eigenvalue phase $\phi$ of a unitary operator $U$ given access to an eigenstate $\lvert u\rangle$ of $U$. It is one of the most important subroutines in quantum computing, used as a building block in [[shor|Shor' | **Quantum phase estimation** (QPE) is a quantum algorithm that estimates the eigenvalue phase $\phi$ of a unitary operator $U$ given access to an eigenstate $\lvert u\rangle$ of $U$. It is one of the most important subroutines in quantum computing, used as a building block in [[shor|Shor' | ||
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