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How many single and double qubit gates are required to create a uniform superposition of vertices of a Johnson Graph J(n,r)?

quantum-gate quantum-state circuit-construction

modified 15 hours ago glS♦ 15.2k

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Aproximating unitaries with elements from a t-design

quantum-gate circuit-construction universal-gates t-designs

modified 15 hours ago glS♦ 15.2k

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A question on at what depth and for what architecture random quantum circuits are $1$ designs

quantum-gate quantum-advantage random-quantum-circuit haar-distribution t-designs

modified 15 hours ago glS♦ 15.2k

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491

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Understanding the implementation of Grover's diffusion operator using the oracle qubit

quantum-gate algorithm grovers-algorithm quantum-circuit

modified 15 hours ago glS♦ 15.2k

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What is the thought process for circuit making after seeing input and output of a matrix?

quantum-gate circuit-construction textbook-and-exercises nielsen-and-chuang

modified yesterday glS♦ 15.2k

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Prove $E(R_n(\alpha),R_n(\theta)^n)<\epsilon/3$ from $E\big(R_n(\alpha),R_n(\alpha+\beta)\big)=|1-\exp(i\beta/2)|$

quantum-gate textbook-and-exercises nielsen-and-chuang universal-gates

modified 2 days ago Adam Zalcman 9,320

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Do we need ancillary qubits to implement orthogonal measurements?

quantum-gate quantum-state measurement

answered 2 days ago glS♦ 15.2k

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Conditional lower bound on approximate stabilizer rank of magic states

quantum-gate quantum-state algorithm error-correction stabilizer-state

answered Oct 18 at 13:28 Condo 942

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How is transformation for measurement in an arbitrary basis derived?

qiskit quantum-gate quantum-state measurement

modified Oct 15 at 15:36 Adam Zalcman 9,320

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Measurement of single qubit operator $U$ which is both Hermitian and unitary with eigenvalues $±1$

quantum-gate measurement textbook-and-exercises nielsen-and-chuang

modified Oct 14 at 17:49 Condo 942

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Understanding "Restrictions on Transversal Encoded Quantum Gate Sets"

quantum-gate error-correction

modified Oct 13 at 23:29 Mark S 5,570

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how to know the appropriate time to know the SWAP gate operation in dipole interaction

quantum-gate density-matrix

modified Oct 11 at 7:30 Mauricio 951

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Are composite gates within superconducting hardware implemented as a single pulse or as a series of pulses?

quantum-gate hadamard superconducting-quantum-computing

answered Oct 8 at 20:06 Craig Gidney 16k

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What is the name of this "ancilla based" process to implement gates

quantum-gate teleportation

modified Oct 8 at 9:50 Craig Gidney 16k

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