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15

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Is the final state in the quantum period finding algorithm entangled?

algorithm shors-algorithm

answered 6 hours ago glS 13.3k

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1

answer

38

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How do I apply a matrix to a ket state?

answered 7 hours ago KAJ226 8,206

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16

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After creating the Ising Hamiltonian, how it can be used in QAOA to find the optimal solution? Instead of using quadratic program

programming quantum-gate algorithm ibm-q-experience qaoa

asked 9 hours ago Singh 11

2

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1

answer

33

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Knill-Laflamme condition derivation in Nielsen&Chuang: issue to understand a part of the proof

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answered 9 hours ago StarBucK 746

5

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2

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2k

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What is the square root of the NOT gate?

quantum-gate matrix-representation

modified yesterday Community♦ 1

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32

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Transform circuit with 3 CNOTs in one with limited interactions on the first qubit

circuit-construction quantum-circuit

modified 16 hours ago glS 13.3k

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11

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Solution to Qiskit textbook Lab 3. Accuracy of Quantum Phase Estimation

programming qiskit ibm-q-experience shors-algorithm phase-estimation

asked 18 hours ago martynscn 9

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16

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issues running a 32 qubit grover's algorithm

ibm-q-experience grovers-algorithm

asked 23 hours ago James Bian 75

2

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31

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Set the bounds for ansatz parameters in VQE

qiskit vqe optimization parametrization

modified yesterday Antonio Anna Mele 71

2

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0

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31

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From QUBO problem to quantum circuit [duplicate]

hamiltonian-simulation quantum-circuit

modified yesterday incud 629

4

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1

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50

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CNOT error rate of 1 in IBM Quantum Experience

quantum-gate ibm-q-experience

answered yesterday luciano 2,562

2

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0

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18

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Clean definition and interpretation of “error” in quantum error correction

error-correction

asked yesterday StarBucK 746

2

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1

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27

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Add FreezeCoreOrbitals on ElectronicStructureProblem

programming qiskit chemistry

modified yesterday glS 13.3k

5

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1

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79

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Can we calculate the quantum volume of a classical computer?

architecture technical-standards quantum-volume

modified 2 days ago glS 13.3k

2

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1

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60

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Prove that any Hermitian Matrix is a real linear combination of Pauli operators [duplicate]

hamiltonian-simulation pauli-gates linear-algebra

modified yesterday glS 13.3k

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29

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Qiskit Portfolio Optimization : Does the resulting matrix show the stock combination to select?

qiskit ibm-q-experience vqe optimization

answered yesterday des137 11

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1

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40

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What's free evolution for a period T?

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answered 2 days ago Quantum Mechanic 201

1

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82

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Argue positivity of mean value of an entanglement witness matrix for all separable state

entanglement

modified 2 days ago quantum_student 11

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3

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82

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What is the point of Grover's algorithm, really?

algorithm grovers-algorithm

answered May 13 at 0:51 benrg 294

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2

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74

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Show when $a_k$ and $b_k$ are correlated when measuring in different bases, in the BB84 protocol

measurement textbook-and-exercises nielsen-and-chuang cryptography bb84

modified 2 days ago glS 13.3k

2

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1

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38

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Replacement of FermionicOperator from qiskit.chemistry in qiskit_nature

programming qiskit

answered May 12 at 22:01 KAJ226 8,206

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40

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How do you build the modified Toffoli gate using only local unitary and CNOT operations?

programming quantum-gate circuit-construction

modified 2 days ago glS 13.3k

2

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1

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34

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Time result for my algorithm

programming qiskit algorithm ibm-q-experience

modified 2 days ago glS 13.3k

2

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2

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45

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Who is responsible for implementing quantum error correction?

ibm-q-experience error-correction shors-algorithm ibm

answered May 12 at 7:18 holl 76

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52

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Can any “control-something unitary” be written with control and target spaces flipped?

circuit-construction unitarity

modified May 12 at 14:23 glS 13.3k

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40

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Where is entanglement present and absent in the one clean qubit model of computation?

entanglement models terminology

modified May 12 at 13:48 Mark S 4,859

1

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43

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IBM quantum computer giving the wrong result?

ibm-q-experience ibm

modified May 12 at 10:44 luciano 2,562

1

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1

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24

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How to import circuit libraries into qiskit

programming qiskit ibm-q-experience qasm

modified May 12 at 15:45 glS 13.3k

3

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2

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46

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Inverse of Statevector.from_label in Qiskit

programming qiskit

modified May 11 at 18:04 Frank 376

1

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1

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56

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Is there a way I can reduce the code for generating simple circuits with the same structure?

programming qiskit

modified May 11 at 10:20 luciano 2,562

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44

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How to simplify a circuit with repeated same parts?

programming qiskit ibm-q-experience

modified May 11 at 18:53 rjh324 1,247

1

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1

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24

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Quantum gates with respect to phase angles

quantum-gate linear-algebra

answered May 12 at 7:13 DaftWullie 37.3k

3

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1

answer

59

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When and how do we use basis embedding?

simulation machine-learning quantum-enhanced-machine-learning clifford-group

modified May 11 at 11:59 narip 533

2

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2

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148

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Making a Controlled-Z from a CNOT

quantum-gate circuit-construction

modified May 10 at 8:23 Durd3nT 402

2

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1

answer

57

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configuration of FakeOpenPulse2Q

programming qiskit openpulse

answered May 12 at 14:24 Patrick Mensac 126

2

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1

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68

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Is RYY gate not available in IBM Quantum Composer?

quantum-gate ibm-q-experience circuit-construction

modified May 11 at 12:33 glS 13.3k

3

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1

answer

42

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How does $|00\rangle$ evolve through an Hadamard and a CNOT gate?

quantum-gate quantum-circuit

modified May 10 at 22:07 glS 13.3k

2

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1

answer

26

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Performing a generic single-qubit Pauli error channel in stim

programming stim

modified May 11 at 14:42 Craig Gidney 12.8k

1

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1

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28

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In a Swap Test why is the control qubit influenced and aren't the target qubits altered?

algorithm quantum-circuit swap-test

modified May 11 at 10:50 glS 13.3k

3

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1

answer

32

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Unit vanishes in the Quantum Cramer-Rao Bound?

mathematics quantum-fisher-information quantum-metrology

modified May 11 at 12:34 glS 13.3k

3

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1

answer

32

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Quantum State Tomography from IQ plane data

quantum-state machine-learning tomography quantum-process-tomography

answered May 11 at 15:48 Quantum Mechanic 201

3

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2

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232

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Drawing the circuit in Qiskit - how to set same style as in Composer?

programming qiskit ibm-q-experience

modified May 7 at 17:17 Durd3nT 402

3

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1

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42

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Toffolli upside down - an equivalent circuit

quantum-gate circuit-construction

modified May 10 at 10:31 Durd3nT 402

2

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1

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27

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Gate Cost to Transform Superposition of Hamming weight 1 states to superposition of arbitrary basis states?

quantum-gate pauli-gates superposition

modified May 10 at 19:12 Craig Gidney 12.8k

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0

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23

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Quantum Feature Importance [closed]

quantum-enhanced-machine-learning

modified May 11 at 10:43 glS 13.3k

2

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1

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53

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Qiskit: Transpilation and the CircuitSampler

programming qiskit ibm-q-experience transpile

answered May 9 at 19:53 Cryoris 1,411

1

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0

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64

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Does a quantum computer exist today? [closed]

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modified May 9 at 20:13 luciano 2,562

4

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3

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78

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How to find the distance between a given $\rho$ and the nearest pure state(s)?

quantum-state density-matrix fidelity trace-distance

answered May 7 at 10:03 Norbert Schuch 4,292

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