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15

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Any two level flip in $n$ qubit system

quantum-gate circuit-construction

answered 1 hour ago Craig Gidney 8,106

1

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1

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13

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How can I implement an arbitrary quantum channel in a quantum circuit for real experiments using IBM quantum experience?

qiskit

answered 4 hours ago Arthur Pesah 88

0

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1

answer

24

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

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

answered 11 hours ago cnada 3,824

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1

answer

18

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Rotation of multi-body interaction in quantum circuit

algorithm circuit-construction simulation

answered 13 hours ago DaftWullie 27.4k

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2

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43

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Qiskit unitary representation seems shifted

qiskit

answered 21 hours ago cnada 3,824

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0

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26

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Shifting amplitude from one basis to another with a control qubit

quantum-gate no-cloning-theorem

modified 13 hours ago psitae 915

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1

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20

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What does it look like to split an EPR pair?

quantum-state entanglement nielsen-and-chuang teleportation superdense-coding

answered yesterday DaftWullie 27.4k

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1

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35

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In the context of Quantum theory of Information, Typical eigenvectors are permutations of basis vectors. Why?

quantum-information

modified yesterday met927 1,805

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0

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27

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Can't load account on IBM's qiskit

qiskit ibm-q-experience

modified yesterday José 101

3

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1

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160

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Does Controlled-U gate entangle qubits?

quantum-gate quantum-state quantum-information quantum-operation

answered 2 days ago DaftWullie 27.4k

3

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0

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40

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Matrix mod 2 multiplication

circuit-construction

modified yesterday mavzolej 337

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1

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42

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Does principle of deffered measurement imply information can travel faster than light?

circuit-construction teleportation

answered 2 days ago Mariia Mykhailova 4,718

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0

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25

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How qubit phase is build in real hardware?

ibm-q-experience physical-realization physical-qubit d-wave

modified yesterday Martin Vesely 3,613

1

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1

answer

15

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Why is the number of qubits linear in the inverse of epsilon in Quantum Phase Estimation?

circuit-construction phase-estimation

answered yesterday DaftWullie 27.4k

-2

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0

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38

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If one had a verifiable solution to P versus NP problem, how, and why, would one go about submitting it?

algorithm quantum-state quantum-information entanglement correlations

modified yesterday Charles Lawrence 1

4

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1

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68

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Represent a pure state in terms of 2 antipodal points on the Bloch sphere

quantum-state mathematics bloch-sphere

modified 2 days ago Davit Khachatryan 910

1

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0

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20

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Repeating Quantum Phase Estimation algorithm

circuit-construction phase-estimation

asked yesterday g2i 77

3

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1

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46

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$H = e^{i\pi/4} \sqrt{iNOT}$?

quantum-gate physical-realization hadamard

answered 2 days ago DaftWullie 27.4k

1

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1

answer

46

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I made a simple circuit on qiskit,but I have some question on this result

programming circuit-construction ibm-q-experience

modified 2 days ago Martin Vesely 3,613

0

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1

answer

14

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Error parameters from Qiskit backends

qiskit programming quantum-information ibm-q-experience noise

answered yesterday Matthew Stypulkoski 1,148

1

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1

answer

63

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Trying to use matrices for Hadamard and Controlled Not gates

quantum-gate matrix-representation

modified 2 days ago Glorfindel 455

1

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0

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27

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Qiskit not installing properly on pyCharm CE

qiskit

modified 2 days ago Martin Vesely 3,613

2

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1

answer

64

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Problem with controlled rotation in HHL

hhl-algorithm

answered Apr 6 at 9:16 DaftWullie 27.4k

2

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1

answer

25

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QML: “Quantum Data loader” instead of QRAM?

algorithm machine-learning

answered 2 days ago cnada 3,824

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1

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34

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It two unitaries are delta apart in trace norm, then what is the trace norm of outputs states when the same input state is applied to two unitaries?

quantum-gate quantum-state quantum-information trace-distance

modified Apr 6 at 9:28 DaftWullie 27.4k

3

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2

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36

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How to implement exponentiation of a gate without breaking complexity?

circuit-construction complexity-theory quantum-fourier-transform phase-estimation

answered Apr 6 at 7:59 DaftWullie 27.4k

3

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0

answers

26

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Decomposing Hamiltonian into qubit model representation

algorithm quantum-advantage vqe

asked Apr 6 at 17:05 WantToLearn 31

0

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1

answer

21

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Placement of quantum circuits

cirq

answered Apr 6 at 16:22 Craig Gidney 8,106

0

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1

answer

27

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Find local state and compute Bloch coordinates, like Quirk

quantum-state bloch-sphere quirk

modified Apr 6 at 11:35 Davit Khachatryan 910

0

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2

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31

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How to perform operations like sin over Qiskit parameters

quantum-gate qiskit

answered Apr 6 at 16:11 Matthew Treinish 266

1

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0

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19

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What does the maximum of a Hamiltonian means (in a particular paper)?

machine-learning qaoa

modified Apr 6 at 13:39 nathan raynal 397

1

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1

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40

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Topological quantum computer and two dimensional materials

physical-realization topological-quantum-computing anyons

modified Apr 6 at 15:32 Emil Prodan 56

1

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1

answer

38

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Need some help with Purity calculation

quantum-state density-matrix

answered Apr 6 at 7:41 DaftWullie 27.4k

2

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1

answer

76

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What does the notation $U(B,\beta) = \prod_{j =1}^n e^{-i \beta \sigma_j^x} $ mean in the context of QAOA?

tensor-product notation qaoa

modified Apr 4 at 16:52 glS 9,274

1

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1

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24

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$\lambda$ parameter for U3 gate in qiskit Bloch sphere visualisation

qiskit bloch-sphere

answered Apr 6 at 7:55 DaftWullie 27.4k

1

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1

answer

28

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Qiskit - Z expectation value from counts?

qiskit measurement

modified Apr 5 at 16:56 Davit Khachatryan 910

1

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2

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51

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Problem with commutation of $e^{-iH_1t}$ and $e^{-iH_2t}$, where $H_1$ commutes with $H_2$

hamiltonian-simulation quirk

answered Apr 4 at 18:31 Davit Khachatryan 910

0

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0

answers

26

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Finding minimum with Grover

algorithm programming grovers-algorithm quantum-operation

modified Apr 5 at 6:29 Martin Vesely 3,613

0

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1

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18

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Is there quantum error correction code package for python

error-correction qutip

answered Apr 4 at 21:31 met927 1,805

2

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1

answer

35

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In Google's Quantum Supremacy experiment, what if we use $\theta=45°$ for two-qubit $f_{sim}$ gates?

quantum-gate quantum-advantage google-sycamore

modified Apr 3 at 23:40 Craig Gidney 8,106

2

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1

answer

42

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What does the notation $\sigma_j^z$ mean for Pauli matrices?

pauli-gates notation

modified Apr 2 at 12:48 glS 9,274

0

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1

answer

55

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Quantum Neural Network

quantum-gate quantum-information

answered Apr 4 at 16:43 Arthur Pesah 88

2

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0

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18

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Quantum circuit CCX optimization for Grover

circuit-construction grovers-algorithm

modified Apr 4 at 14:53 Martin Vesely 3,613

2

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2

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67

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Gate Y returns wrong phase in IBM's circuit composer

ibm-q-experience pauli-gates

answered Apr 2 at 22:34 Emil Prodan 56

0

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0

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35

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Not sure what do Nielsen and Chuang mean by number of operations

algorithm complexity-theory nielsen-and-chuang

modified Apr 3 at 16:55 met927 1,805

3

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1

answer

47

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Quantum Computing Mailing Lists

resource-request research

answered Apr 4 at 17:09 Arthur Pesah 88

1

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0

answers

12

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How to get the $T1$ specs for the Rigetti's quantum processor (Aspen 7)

simulation rigetti pyquil

modified Apr 4 at 22:17 Martin Vesely 3,613

0

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1

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51

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How are the two states factored out of Deutsch's circuit?

deutsch-jozsa-algorithm

modified Apr 3 at 0:30 Mariia Mykhailova 4,718

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