Quantum Computing Stack Exchange

0

votes

0

answers

19

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How to correct a phase error of the form $e^{ix}$

error-correction

modified 2 hours ago virattara 65

0

votes

0

answers

6

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Amplitude estimation over subspace of problem

amplitude-amplification amplitude

modified 2 hours ago C. Kang 1,025

3

votes

2

answers

138

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Problem 2.2 in Nielsen & Chuang - Properties of the Schmidt number

mathematics nielsen-and-chuang

answered 3 hours ago Attila Kun 298

1

vote

1

answer

40

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IBM quantum circuit - order of tensor product for equivalent matrix

quantum-gate circuit-construction tensor-product

modified 6 hours ago Community♦ 1

1

vote

2

answers

60

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What is the matrix representation of the Hadamard gate in the computational basis?

quantum-gate hadamard

modified 6 hours ago Condo 376

9

votes

3

answers

2k

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How to calculate circuit depth properly?

circuit-construction

answered 8 hours ago Arnaldo Gunzi 1

0

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2

answers

65

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What is Ising Hamiltonian ? What its role in Portfolio Diversification?

qiskit resource-request optimization quantum-computing-for-finance

answered 8 hours ago Rochisha Agarwal 31

0

votes

0

answers

10

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How to construct Hamiltonian for combinatorial optimization problems and then convert into Pauli basis?

vqe qaoa quantum-computing-for-finance

asked 8 hours ago Rochisha Agarwal 31

2

votes

2

answers

50

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Having trouble finding angles for Bloch vector

qiskit mathematics textbook-and-exercises

modified 8 hours ago glS 11k

1

vote

2

answers

35

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How to execute many circuits on an IBMQ backend?

qiskit programming ibm-q-experience

modified 8 hours ago glS 11k

3

votes

1

answer

28

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How to understand intuitively the quantum gate phase kickback?

quantum-gate phase-kickback

modified 9 hours ago glS 11k

0

votes

2

answers

125

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How to initialise a qubit in the state $\frac{1}{\sqrt2}(|0\rangle+|1\rangle)$ in qiskit?

qiskit programming

modified 9 hours ago glS 11k

2

votes

2

answers

135

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Question regarding soundness bound in QMA versus QCMA separation

algorithm complexity-theory inequality

modified 9 hours ago glS 11k

1

vote

2

answers

72

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Running Google Cirq example code from their webpage — where do I find information about PROCESSOR_ID?

programming cirq

modified 9 hours ago glS 11k

1

vote

3

answers

150

views

Creating a custom VariationalForm in Qiskit

qiskit programming vqe

answered 9 hours ago Rochisha Agarwal 31

-1

votes

3

answers

85

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Google Colab - ImportError: The class MatplotlibDrawer needs pylatexenc

quantum-gate quantum-state qiskit circuit-construction

modified 9 hours ago Oussama Rizwi 3

2

votes

0

answers

19

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What is the best way to use loop statements on a quantum computer?

programming ibm-q-experience classical-computing

modified 10 hours ago Glorfindel 500

1

vote

0

answers

22

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What is the advantage of QSVM over the classical SVM?

qiskit machine-learning quantum-enhanced-machine-learning

modified 10 hours ago glS 11k

2

votes

1

answer

54

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Test equivalence of circuits exactly on qiskit

qiskit programming circuit-construction

modified 10 hours ago glS 11k

1

vote

1

answer

29

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Is there a way to generate random circuits in qiskit with only certain allowed gates?

qiskit programming circuit-construction

modified 10 hours ago glS 11k

-2

votes

0

answers

33

views

Secret string in least significant bit with Simon algorithm

algorithm textbook-and-exercises simons-algorithm

modified 10 hours ago glS 11k

3

votes

0

answers

53

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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

modified 12 hours ago Glorfindel 500

0

votes

2

answers

38

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Custom Gate/Instruction with classical bits in Qiskit

qiskit programming

answered 12 hours ago tsgeorgios 76

0

votes

1

answer

29

views

How can I use the quantum volume to design the scale of my experiment?

qiskit ibm-q-experience hhl-algorithm quantum-volume

answered 12 hours ago Markus Heinrich 265

4

votes

2

answers

33

views

Bell state preparation

quantum-gate quantum-state tensor-product bell-basis

modified 12 hours ago Martin Vesely 5,763

1

vote

2

answers

51

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quantum random number generator implementation in quantum lab

qiskit ibm-q-experience

modified 13 hours ago Martin Vesely 5,763

0

votes

1

answer

22

views

What is the convention of indices for the one and two-body integrals in qiskit

qiskit chemistry

answered 16 hours ago C. Kang 1,025

1

vote

1

answer

35

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Quadratic optimization in Qiskit: Error when QuadraticProgram with quadratic constraint converted to QUBO

qiskit ibm-q-experience optimization

modified 19 hours ago Glorfindel 500

3

votes

1

answer

79

views

Is running a for loop faster on a quantum computer than a classical computer?

algorithm programming

modified 20 hours ago thespaceman 65

3

votes

0

answers

29

views

Is there a measurable of entanglement for a macroscopic system?

entanglement experiment solid-state

modified 21 hours ago user157879 288

0

votes

1

answer

45

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How to code a projector operator in qiskit?

qiskit programming quantum-operation gate-synthesis projection-operator

answered yesterday Winona 90

2

votes

1

answer

39

views

Why running time of qasm simulator is significantly smaller in comparison with quantum machines?

programming ibm-q-experience simulation qasm

modified yesterday glS 11k

0

votes

1

answer

37

views

How to get state vector from QasmSimulator in Qiskit

qiskit programming

modified yesterday glS 11k

2

votes

1

answer

49

views

How can I convert the unitary matrix $e^\frac{i\pi}{2}$ into a quantum circuit in Qiskit?

quantum-gate qiskit circuit-construction unitarity

modified yesterday glS 11k

0

votes

1

answer

18

views

Implementing Partial Trace in IBMs quantum computer

decoherence partial-trace

answered yesterday Aditya Giridharan 364

1

vote

1

answer

29

views

Qiskit IBMQ.load_account fails on version 0.20.0

qiskit programming

modified yesterday Community♦ 1

3

votes

0

answers

15

views

Reducing the depth of quantum circuits with ancilla qubits

circuit-construction gate-synthesis quantum

asked yesterday nippon 1,272

3

votes

1

answer

86

views

Why attenuator and not filters for QC driving line

physical-realization noise superconducting-quantum-computing

modified yesterday Community♦ 1

1

vote

1

answer

41

views

Distributed quantum computing with classical communication

algorithm resource-request communication

modified yesterday Community♦ 1

2

votes

1

answer

32

views

CNOT expressed with CZ and H gates by taking into account HZH =X

quantum-gate gate-synthesis pauli-gates

modified yesterday Davit Khachatryan 2,893

0

votes

1

answer

22

views

Where does errors occur during error syndrome and recovery?

error-correction nielsen-and-chuang fault-tolerance

answered yesterday DaftWullie 32.5k

2

votes

1

answer

76

views

What are the benefits of using quantum machine learning?

machine-learning quantum-enhanced-machine-learning pennylane

modified yesterday Community♦ 1

0

votes

1

answer

12

views

Implementing Cirq Coding Gates

quantum-gate circuit-construction entanglement cirq contextuality

modified yesterday Craig Gidney 9,850

1

vote

1

answer

44

views

Hadamard gate for three qubits; inconsistency between IBM and Matlab

qiskit matrix-representation unitarity hadamard

answered yesterday LOC 41

2

votes

1

answer

41

views

My IBMQ job hangs forever?

qiskit ibm-q-experience

modified yesterday luciano 354

1

vote

2

answers

30

views

What is the significance of transpiling time, validating time, in queue time and running time?

ibm-q-experience

modified 2 days ago Martin Vesely 5,763

1

vote

1

answer

27

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What is meaning of 'up to a global phase'? [duplicate]

quantum-state textbook-and-exercises

modified 2 days ago Martin Vesely 5,763

3

votes

2

answers

47

views

Can Alice and Bob distinguish entangled state coefficients?

quantum-state entanglement measurement density-matrix

answered 2 days ago DaftWullie 32.5k

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