Quantum Computing
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Awarded 909 times.
What does it mean “the N uses of classical-quantum channel”?
Awarded yesterday
Changing the sign of relative phase
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A CNOT between two Hadamard gates: why does the CNOT changed the output of the second Hadamard gate?
Awarded yesterday
Question about a circuit from “Quantum Computing for Computer Scientists”
Awarded 2 days ago
In QAOA why do we need $m \log(m)$ repititions to get at least $F_{p}(\beta , \gamma) - 1$ with probability of $1 - 1/m$?
Awarded Nov 29 at 0:56
In Uhlmann's theorem, should the polar decomposition be written as $A=|A|V$ or $A=V|A|$?
Awarded Nov 29 at 0:34
How to generate all stabilizer states numerically?
Awarded Nov 27 at 11:06
Question about quantum error correction and density matrixs
Awarded Nov 26 at 2:50
Is the trace distance between multipartite states invariant under permutations?
Awarded Nov 26 at 2:21
Is there a simple, formulaic way to construct a modular exponentiation circuit?
Awarded Nov 24 at 1:21
(post deleted or otherwise unavailable)
Awarded Nov 22 at 8:03
How to perform the unitary transformation $U|i,j_1\rangle = 1/\sqrt{k}(|i,j_1\rangle+|i,j_2\rangle+|i,j_3\rangle…+|i,j_k\rangle)$?
Awarded Nov 20 at 18:47
Measurement of 1 qubit in a two qubit system
Awarded Nov 20 at 16:25
State bug in IBM Quantum Experience
Awarded Nov 20 at 9:07
Length / transpilation issues with Grover's algorithm
Awarded Nov 20 at 2:08
What is meant with “reconciliation” in CV QKD?
Awarded Nov 19 at 7:07
How does the CX gate work?
Awarded Nov 19 at 5:36
What can I conclude about $\langle \phi|\pi_1\pi_2|\phi\rangle$ if $\langle \phi|\pi_i|\phi\rangle\ge e$?
Awarded Nov 17 at 17:42
What is a unitary operator that makes all the amplitudes all negative on the arbitrary state of $n$ qubits?
Awarded Nov 16 at 11:33
Where is the parallelism in Deutsch-Jozsa algorithm?
Awarded Nov 16 at 6:52
Is there an explanation for why, to search through an unstructured database, the average number of checks is $\frac{N}{2}$ in classical computation?
Awarded Nov 15 at 23:10
How to learn parameters in a quantum circuit, given an interference pattern?
Awarded Nov 15 at 2:26
Quantum Walk Study Resource for Non-regular Graph
Awarded Nov 13 at 17:55
How to learn parameters in a quantum circuit, given an interference pattern?
Awarded Nov 12 at 13:05
Transforming $|01 \rangle + |10 \rangle - |11 \rangle \to |01 \rangle - |10 \rangle + |11 \rangle$
Awarded Nov 10 at 17:40
Quantum Fourier Transform for general cyclic groups
Awarded Nov 10 at 10:15
What are the properties of the matrices representing quantum gates?
Awarded Nov 10 at 8:20
No histogram appears in my job results
Awarded Nov 9 at 19:28
Why and how is quantum noise predictable?
Awarded Nov 8 at 2:11
How can I construct a 2-qubit state using single qubit gates and CNOT gate?
Awarded Nov 7 at 10:20
Traveling salesman problem in Qiskit: cannot find a solution on simulator
Awarded Nov 6 at 17:12
How do I fix the UnboundLocalError?
Awarded Nov 4 at 18:56
Toffoli circuit explanation [closed]
Awarded Nov 3 at 21:13
Overview of Cirq, qiskit, q#, ibmq(circuit board), other [closed]
Awarded Nov 3 at 17:21
Confused about the application of Hadamard gate to uncorrelated qubits [duplicate]
Awarded Nov 2 at 15:03
How to repeat circuit efficiently and reliably in IBM Qiskit?
Awarded Nov 1 at 20:05
Implementing the HHL algorithm with negative eigenvalues (Cirq)
Awarded Oct 31 at 13:40
How to solve QUBO problems in Q#?
Awarded Oct 30 at 21:27
Bernstein-Vazirani Gate IBM Q Noise
Awarded Oct 30 at 19:06
How many shots should one take to get a reliable estimate in a quantum program?
Awarded Oct 30 at 7:25
How to perform this $d$-dimensional unitary operation on IBM Q?
Awarded Oct 29 at 9:40
No backends assigned to my Account
Awarded Oct 29 at 7:28
Prove that the trace norm is dual to the spectral norm
Awarded Oct 28 at 19:06
von Neumann entropy in a limiting case
Awarded Oct 24 at 16:41
Optimizations in quantum circuits
Awarded Oct 23 at 4:47
How to use the measurement in quantum phase estimation?
Awarded Oct 22 at 20:41
(post deleted or otherwise unavailable)
Awarded Oct 21 at 7:20
Cirq: Creating an arbitrary gate for an arbitrary number of qubits
Awarded Oct 20 at 12:03
How to compute the measurement probability in swap test?
Awarded Oct 19 at 4:08
JSONDecodeError with backend.run
Awarded Oct 18 at 23:11
Superposition of quantum circuits
Awarded Oct 16 at 14:07
Choi matrix in QETLAB
Awarded Oct 15 at 12:36
(post deleted or otherwise unavailable)
Awarded Oct 15 at 12:09
(post deleted or otherwise unavailable)
Awarded Oct 15 at 3:42
Quantum relative entropy with respect to a pure state
Awarded Oct 14 at 23:26
How to use VQE function in Qiskit
Awarded Oct 14 at 20:56
Quantum relative entropy with respect to a pure state
Awarded Oct 14 at 17:42
How does Fourier sampling actually work (and solve the parity problem)?
Awarded Oct 14 at 11:27
Significance of sharing an entangled state in Superdense Coding
Awarded Oct 13 at 18:33
Relative entropy inequality for many copies of a channel
Awarded Oct 13 at 14:26
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