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Changing the sign of relative phase

quantum-gate quantum-state

answered 27 mins ago DaftWullie 34.3k

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A CNOT between two Hadamard gates: why does the CNOT changed the output of the second Hadamard gate?

quantum-gate hadamard quantum-circuit

modified 12 hours ago KAJ226 2,773

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Is there an efficient way to realize a Toffoli with control qubits fixed at $|+\rangle$?

quantum-gate circuit-construction

modified 18 hours ago Daniele Cuomo 93

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How to implement gate error mitigation in Qiskit?

quantum-gate qiskit error-mitigation

answered yesterday KAJ226 2,773

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Creating a parameterized Operator in Qiskit

quantum-gate programming qiskit vqe unitarity

answered yesterday tsgeorgios 936

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Question about a circuit from “Quantum Computing for Computer Scientists”

quantum-gate programming grovers-algorithm quantum-circuit

modified yesterday LPenguin 113

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How do we realise photonic gates?

quantum-gate physical-realization photonics optical-quantum-computing

modified yesterday glS 11.4k

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Which codes can implement transversal non-Clifford gates

quantum-gate error-correction stabilizer-code surface-code

modified 2 days ago Martin Vesely 6,630

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Pauli Matrix tolerant and encoding

quantum-gate entanglement error-correction textbook-and-exercises nielsen-and-chuang

modified Nov 29 at 1:11 QC-learner 49

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Question Regarding Quantum Period-Finding Fourier Transform Approximation

quantum-gate algorithm nielsen-and-chuang shors-algorithm quantum-fourier-transform

answered Nov 28 at 17:39 Anatoly 11

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CSS Code and Fault-tolerant Problem in Nielsen and Isaac Chuang‘s book

quantum-gate error-correction textbook-and-exercises nielsen-and-chuang fault-tolerance

modified Nov 28 at 13:30 QC-learner 49

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How to apply a operator to qubit system on the basis of current state of system?

quantum-gate programming quantum-state unitarity

modified Nov 27 at 19:09 glS 11.4k

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Physical implementing random unitary

quantum-gate programming physical-realization

modified Nov 26 at 11:36 glS 11.4k

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What is a “repeat until success quantum circuit” in quantum neural networks?

quantum-gate quantum-enhanced-machine-learning quantum-neural-network

modified Nov 26 at 11:35 glS 11.4k

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