Quantum Computing Stack Exchange

3

votes

0

answers

26

views

Bell State 11 not working for parity curve

modified 4 mins ago thewolfaxe 16

3

votes

1

answer

10

views

Bug in IBM backend?

quantum-gate ibm-q-experience

answered 57 mins ago Nelimee 1,980

0

votes

0

answers

6

views

Does an Oracle use only the eigenstates of the quantum register?

grovers-algorithm

asked 1 hour ago michiel perdeck 26

1

vote

3

answers

30

views

Controlled Z gate acting on 3 qubits in matrix form

quantum-gate matrix-representation

answered 2 hours ago DaftWullie 18k

1

vote

0

answers

7

views

How to add states on the Bloch sphere from a master equation?

programming bloch-sphere qutip

modified 2 hours ago Sanchayan Dutta 7,836

1

vote

0

answers

9

views

How to represent $|+\rangle$ in Python?

quantum-state programming

modified 2 hours ago Sanchayan Dutta 7,836

1

vote

0

answers

7

views

Understanding CNOT gate for indirect measurement

quantum-gate circuit-construction

modified 2 hours ago Sanchayan Dutta 7,836

1

vote

0

answers

16

views

Understanding the “Controlled Rotations” used in the HHL algorithm

algorithm hhl-algorithm

modified 6 hours ago IntegrateThis 136

1

vote

2

answers

38

views

CX gate with Hadamard

quantum-gate quantum-state

modified 13 hours ago Mithrandir24601♦ 2,541

3

votes

1

answer

14

views

2 ways to do the three qubits bit-flip code

error-correction

answered 13 hours ago James Wootton 7,271

2

votes

0

answers

19

views

How to prove the following bosonic entanglement expression?

quantum-information entanglement entropy entanglement-witness

modified 13 hours ago Mithrandir24601♦ 2,541

4

votes

0

answers

21

views

Motivation for the definition of k-distillability

quantum-information entanglement mathematics

modified 17 hours ago Sanchayan Dutta 7,836

2

votes

0

answers

9

views

Geometric interpretation of 1-distillability

quantum-information entanglement mathematics

asked 17 hours ago Sanchayan Dutta 7,836

4

votes

1

answer

40

views

Using the HHL algorithm to compute $A |b \rangle$ instead of $A^{-1} |b \rangle$

algorithm hhl-algorithm

modified 18 hours ago glS 5,205

5

votes

1

answer

31

views

$n$ qubit vs. a $d=2^n$ qudit states and measurements

quantum-state measurement qudit

answered 19 hours ago glS 5,205

3

votes

0

answers

16

views

How many two-qubit gates required for general N-qubit unitary?

circuit-construction universal-gates

asked 23 hours ago as2457 28

5

votes

0

answers

62

views

Calculating power of a quantum computer — RSA

cryptography quantum-operation

modified yesterday Niel de Beaudrap 6,775

4

votes

1

answer

99

views

Understanding the classification of quantum states based on partial transposition: representations of the bipartite density matrix

entanglement density-matrix

modified yesterday Sanchayan Dutta 7,836

1

vote

1

answer

35

views

Construction of Phase Shift Operation used in Quantum Search

mathematics grovers-algorithm nielsen-and-chuang

modified yesterday P_Gate 306

3

votes

1

answer

60

views

Quantum Computing Project Inquiry

resource-request research

modified yesterday Sanchayan Dutta 7,836

5

votes

1

answer

43

views

Equivalent determinant condition for Peres-Horodecki criteria

entanglement mathematics density-matrix matrix-representation

modified yesterday DaftWullie 18k

5

votes

1

answer

64

views

How to calculate the fidelity of a certain gate of a IBMQ device in Qiskit using randomized benchmarking/tomography?

programming qiskit fidelity tomography

modified yesterday James Wootton 7,271

2

votes

1

answer

41

views

IBM Slack links broken

ibm-q-experience ibm

answered yesterday met927 86

7

votes

2

answers

166

views

+100

Clarification of the “Calculations” section of the (HHL09) paper

algorithm hhl-algorithm

modified yesterday Sanchayan Dutta 7,836

3

votes

1

answer

47

views

Implementing a complex circuit for a Szegedy quantum walk in qiskit

quantum-gate programming circuit-construction qiskit

modified 2 days ago Nelimee 1,980

5

votes

1

answer

21

views

If the quantum Fourier transform efficient if only one control-phase is allowed in the gate set

quantum-gate quantum-fourier-transform universal-gates

answered 2 days ago DaftWullie 18k

1

vote

0

answers

26

views

Superdense coding projects

resource-request superdense-coding

modified 2 days ago Sanchayan Dutta 7,836

10

votes

3

answers

325

views

Can quantum computing be profitable without quantum hardware?

applications technologies

modified 2 days ago Percy Venegas Economy Monitor 21

3

votes

1

answer

55

views

Quantum Fourier Transform without SWAPs

quantum-gate circuit-construction quantum-fourier-transform

answered 2 days ago Nan 53

2

votes

2

answers

438

views

How to compute the inverse of an operation in Q#?

programming q#

answered 2 days ago Chris Granade 203

2

votes

0

answers

31

views

GHZ - measuring particles

quantum-state entanglement measurement cryptography

modified 2 days ago Sanchayan Dutta 7,836

5

votes

1

answer

68

views

Are there any experimental groups currently measuring quantum contextuality?

measurement research non-locality contextuality

answered Jun 16 at 5:43 Percy Venegas Economy Monitor 21

5

votes

1

answer

39

views

Get result measurement into a circuit with Qiskit

qiskit error-correction

modified Jun 15 at 17:49 John Garmon 76

4

votes

1

answer

57

views

How to find a common eigenstate of commuting operators?

quantum-state programming quantum-information

modified Jun 15 at 8:39 Danylo Y 1,295

10

votes

2

answers

908

views

Is swap gate equivalent to just exchanging the wire of the two qubits?

quantum-gate

answered Jun 14 at 19:39 LambdaBeta 173

2

votes

1

answer

44

views

Eliminating a term of a superposition state

algorithm quantum-state programming

modified Jun 14 at 13:45 Sanchayan Dutta 7,836

7

votes

2

answers

118

views

How to program a controlled Hadamard-Hadamard gate?

programming circuit-construction qiskit

answered Jun 14 at 13:16 James Wootton 7,271

4

votes

1

answer

22

views

Quantum fidelity simplified formula while both of the density matrices are single qubit states

quantum-state quantum-information density-matrix quantum-channel

modified Jun 14 at 11:09 Yaoling Yang 25

4

votes

1

answer

42

views

Quantum state where phase information is unknown

density-matrix decoherence

answered Jun 14 at 8:17 DaftWullie 18k

1

vote

1

answer

85

views

Quantum secret Sharing using GHZ state paper

quantum-state entanglement measurement

modified Jun 14 at 7:53 Upstart 392

2

votes

0

answers

36

views

Experiments stuck on VALIDATING ibmq_16_melbourne

ibm-q-experience

asked Jun 14 at 7:48 maxdevblock 21

4

votes

1

answer

27

views

Simulating a 3-local Hamiltonian Term

circuit-construction hamiltonian-simulation

answered Jun 14 at 7:26 DaftWullie 18k

-1

votes

0

answers

31

views

IBM Q [Grover's Algorithm]

quantum-information

asked Jun 14 at 6:32 Manohar Manikkavasagam 6

4

votes

0

answers

35

views

What is the motivation for Weyl matrices in quantum information theory?

quantum-information entanglement mathematics

asked Jun 14 at 6:14 Sanchayan Dutta 7,836

5

votes

2

answers

158

views

Quantum counting in Q#

algorithm programming q#

answered Jun 14 at 0:31 Mariia Mykhailova 2,630

3

votes

1

answer

79

views

Counting in Q#: number of solutions

algorithm programming grovers-algorithm q#

answered Jun 14 at 0:00 Mariia Mykhailova 2,630

-3

votes

1

answer

39

views

D-Flip Flop in FPGA's as quantum computer [closed]

classical-computing

answered Jun 13 at 20:11 Winterstorm D 1

Top Questions

Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.