Quantum Computing

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Awarded 1702 times.
Find min of a quantum state L2 norm
Awarded Mar 18 at 6:12
Worst Bell inequality violation with non-maximally entangled state?
Awarded Mar 18 at 0:57
Adding phases of two qubits
Awarded Mar 17 at 20:40
Are Quantum Algorithms that construct another Quantum Algorithm still valid to solve problems in BQP?
Awarded Mar 17 at 17:37
QiskitRuntimeService error - Provided API key could not be found
Awarded Mar 17 at 15:27
Physical interpretation of a 2-photon-qubit system occupying the antisymmetric Bell state
Awarded Mar 16 at 11:10
What exactly are "variational quantum algorithms"?
Awarded Mar 16 at 5:42
QuTip newbie need to understand .reshape()
Awarded Mar 15 at 20:18
How to measure an unknown state produced by a source of qubits?
Awarded Mar 13 at 19:11
Distributive property of Ket over addition
Awarded Mar 13 at 16:10
Is it possible to brute force the Salsa-20 algorithm with quantum computing in a reasonable amount of time?
Awarded Mar 11 at 16:33
What physical quantity does a density operator represent as an observable?
Awarded Mar 11 at 15:47
Generalizing a brick-wall circuit acting on qubits to acting on qudits
Awarded Mar 10 at 21:25
How are quantum circuits constructed on cloud-based quantum computers?
Awarded Mar 10 at 17:51
Qiskit: density matrix after measurement
Awarded Mar 9 at 20:10
Equivalence between Quantum Error Correcting codes and uniqueness of the $[\![5,1,3]\!]$ code
Awarded Mar 9 at 11:07
How to specify custom gate set for the optimization in pytket?
Awarded Mar 7 at 20:35
Why does composing a Clifford circuit to another circuit not work? (Qiskit)
Awarded Mar 7 at 7:58
How to remove gates added in the quantum circuit?
Awarded Mar 6 at 5:41
Where am I going wrong in my understanding of qubit associativity?
Awarded Mar 4 at 19:49
Entanglement and superposition illustration
Awarded Mar 4 at 18:17
How to derive the state of a qubit after a partial measurement?
Awarded Mar 2 at 9:57
Efficient simulation of circuit with variable depth using Cirq
Awarded Mar 1 at 21:52
Bounding operator norm by total variation distance
Awarded Mar 1 at 18:26
What are the possible $\beta$ in a qubit state $\frac{e^{i\pi/8}}{\sqrt5}|0\rangle+\beta|1\rangle$?
Awarded Feb 28 at 15:11
Any way to share code with others in IBM Quantum Lab? [closed]
Awarded Feb 28 at 1:36
Modular Addition general explanation
Awarded Feb 24 at 19:42
Functionality of I and x^sweep gates in the code from the surface code implementation by Google
Awarded Feb 23 at 10:25
Why is the operation in Nielsen and Chuang's Section 8.5 not a quantum operation?
Awarded Feb 23 at 2:09
Entanglement Measurement vs Observation
Awarded Feb 21 at 19:51
cannot find hello_qiskit module
Awarded Feb 21 at 10:08
What projective measurement discriminates between a set of pairwise orthogonal states?
Awarded Feb 21 at 9:09
How to compare 2 classical number using a quantum circuit
Awarded Feb 20 at 21:12
Quantum counting with ancillary qubits
Awarded Feb 20 at 13:18
impossible to design a quantum circuit that uses ‘black box ’ U to implement the controlled unitary CU
Awarded Feb 16 at 15:03
Can I label my QuantumCircut qubits by something other than integers in Qiskit?
Awarded Feb 16 at 2:43
Energy and degeneracy of the ground state and excitations of the toric code
Awarded Feb 14 at 17:51
Derivation of QAOA from AQC
Awarded Feb 14 at 14:06
What's the matrix representation of the CSWAP?
Awarded Feb 11 at 10:42
Is it possible to separate a quantum circuit into several small sub circuits and measure individually?
Awarded Feb 10 at 13:50
How to implement Hamiltonian $0.01Z$?
Awarded Feb 9 at 22:42
Controlled U gate with multiple control qubits
Awarded Feb 9 at 14:06
I can't load account on IBM's qiskit
Awarded Feb 8 at 17:56
Arbitrary two qubit unitaries using SWAP gate instead of CNOT gate
Awarded Feb 7 at 18:57
RZZ from CNOT and RZ
Awarded Feb 7 at 15:35
How does Stim's detector sampler work?
Awarded Feb 7 at 6:30
Is there a circuit that takes two single-qubit states and reflects the second around the first?
Awarded Feb 7 at 4:20
Is a diagonal matrix with one non-zero element a measurable observable?
Awarded Feb 6 at 18:27
How is the match graph extracted from a stim.circuit.detector_error_model?
Awarded Feb 6 at 17:53
What is a universal quantum algorithm?
Awarded Feb 5 at 11:03
How to determine an unknown quantum gate if we know all other gates in the circuit and the inputs and outputs? [duplicate]
Awarded Feb 4 at 17:41
Stabilizer witness for entanglement detection
Awarded Feb 2 at 12:41
Is it possible to express T, CNOT, SWAP, and CCNOT gates as a product of rotation gates?
Awarded Feb 2 at 3:03
Bernstein-Vazirani algorithm to find whether the secret has a one at a specific location
Awarded Feb 1 at 14:57
Prove that the square root measurement $\Lambda_y=\frac14(\rho_{B^3})^{-\frac12}|\psi_y\rangle\langle\psi_y|(\rho_{B^{3}})^{-\frac{1}{2}}$ is a POVM
Awarded Feb 1 at 8:27
How to get the density matrix from a stabilizer table in qiskit
Awarded Jan 31 at 20:56
How can you create S-GATE with U3?
Awarded Jan 31 at 11:06
Understanding the Hadamard gate and what is meant by qubits [duplicate]
Awarded Jan 30 at 17:10
Which gate based quantum computer is the best? [closed]
Awarded Jan 28 at 5:45
Grover, CCZ Gate on IBM Quantum Lab & unexpected outputs
Awarded Jan 26 at 16:33
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