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How does the graphical notation used to denote doubly-controlled gates work?

quantum-gate matrix-representation notation

modified 4 hours ago M. Stern 1,759

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How do you implement a negative controlled gate using the regular controlled gate?

quantum-gate error-correction

modified 7 hours ago glS 10.2k

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Question About How Qiskit Reset Gate Affects Other Entangled Qubits

quantum-gate qiskit programming ibm-q-experience measurement

modified 7 hours ago glS 10.2k

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Visualizing custom gates in Cirq

quantum-gate programming cirq

modified 7 hours ago glS 10.2k

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Applying a gate to all line qubits without explicitly listing them in Cirq

quantum-gate programming circuit-construction cirq

modified 7 hours ago glS 10.2k

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How to prepare a quantum circuit for $\frac{1}{\sqrt{3}}(|00\rangle+|01\rangle+|10\rangle)$ starting from $|00\rangle$

quantum-gate quantum-state circuit-construction entanglement

modified 17 hours ago glS 10.2k

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How the simulator work?

quantum-gate quantum-state qiskit programming simulation

modified yesterday glS 10.2k

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Is there anything Quantikz can do that Tikz cannot do?

quantum-gate circuit-construction

modified yesterday user1271772 6,939

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How can we construct a square root of NOT gate in Qiskit and IBMQ circuit composer using universal gates?

quantum-gate qiskit programming

modified 2 days ago Aleksey Zhuravlev 25

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How can a half-wave plate affect the position qubit and not the polarization qubit of a photon?

quantum-gate deutsch-jozsa-algorithm photonics

answered Jul 8 at 6:46 Aleksey Zhuravlev 25

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Is it possible to create a gate in Q# that is dictated by a matrix?

quantum-gate programming circuit-construction q#

answered Jul 7 at 21:24 user12984287 502

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Expectation value of an operator error: Composition is not defined over operators of different dimensions,

quantum-gate quantum-state qiskit programming

modified Jul 7 at 13:08 glS 10.2k

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Quantum Circuit To Compute Any Inner Product

quantum-gate algorithm machine-learning neural-network

answered Jul 6 at 9:29 user12984287 502

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How do you embed a POVM matrix in a Unitary?

quantum-gate mathematics unitarity

modified Jul 6 at 8:39 user12984287 502

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