Exact quantum polynomial time
In computational complexity theory, EQP (sometimes called QP), which stands for exact quantum polynomial time, is the class of decision problems solvable by a quantum computer which outputs the correct answer with probability 1 and runs in polynomial time. It is the quantum analogue of the complexity class P.
In other words, there is an algorithm for a quantum computer (a quantum algorithm) that solves the decision problem exactly and is guaranteed to run in polynomial time.
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