Hadamard test
id:
hadamard-test-288-16671200
title:
Hadamard test
text:
In quantum computation, the Hadamard test is a method used to create a random variable whose expected value is the expected real part R e ⟨ ψ | U | ψ ⟩ , where | ψ ⟩ is a quantum state and U is a unitary gate acting on the space of | ψ ⟩ . The Hadamard test produces a random variable whose image is in { ± 1 } and whose expected value is exactly R e ⟨ ψ | U | ψ ⟩ . It is possible to modify the circuit to produce a random variable whose expected value is I m ⟨ ψ | U | ψ ⟩ by applying an S † gate a
brand slug:
wiki
category slug:
encyclopedia
description:
Technique in quantum computation
original url:
https://en.wikipedia.org/wiki/Hadamard_test
date created:
date modified:
2024-01-30T15:28:35Z
main entity:
{"identifier":"Q30678452","url":"https://www.wikidata.org/entity/Q30678452"}
image:
fields total:
13
integrity:
14