Hottest Questions Today

2 votes

2 answers

36 views

Classical Information Theory vs. Quantum Information Theory

information-theory

glS♦

18.6k

modified 1 hour ago

1 vote

0 answers

34 views

Doesn't a beamsplitter contradict the nocloning theorem?

continuous-variable

eternalstudent

13

modified 3 hours ago

0 votes

1 answer

33 views

How to determine with local measurements which Bell state we have?

textbook-and-exercises bell-basis

Rammus

3,957

answered 29 mins ago

0 votes

1 answer

15 views

Understanding Paddle Quantum's MBQC simulation

programming measurement

Kun

26

modified 3 hours ago

0 votes

0 answers

12 views

qiskit: convert from ising result to qubo result?

qiskit quantum-state hamiltonian-simulation qubo qiskit-runtime

voxter

101

asked 11 hours ago

0 votes

1 answer

57 views

What is the difference between $|\Phi^+\rangle=\frac1{\sqrt2}(|0,0\rangle+|1,1\rangle)$ and a mixture of $|00\rangle$ and $|11\rangle$?

entanglement bell-experiment

glS♦

18.6k

modified 9 hours ago

0 votes

1 answer

38 views

Can Quantum Computers (not simulators) solve a 4 node TSP?

algorithm

Condo

1,537

modified 45 mins ago

1 vote

3 answers

44 views

What are the differences in using qasm, statevector, and unitary simulators in qiskit?

qiskit qasm

WQian

1

modified 19 hours ago

1 vote

0 answers

14 views

Does QSVT/QSP require singular/eigen decomposition?

algorithm

Cuhrazatee

470

asked 21 hours ago

1 vote

0 answers

19 views

Is there a general parametric transformation matrix form in bloch-space corresponding to the unitary operations on qutrits?

mathematics bloch-sphere qutrit

glS♦

18.6k

modified 9 hours ago

8 votes

0 answers

50 views

Why was Feynman hesitant about simulating fermions with a quantum computer?

hamiltonian-simulation history

Mark S

7,137

modified 19 hours ago

1 vote

1 answer

58 views

+200

What is the conditional min-entropy for diagonal ("classical") matrices?

information-theory entropy state-discrimination relative-entropy min-entropy

Rammus

3,957

modified 8 hours ago

2 votes

1 answer

58 views

What are the practical advantages of quantum GANs with respect to classical ones?

classical-computing quantum-enhanced-machine-learning speedup

glS♦

18.6k

modified yesterday

2 votes

1 answer

42 views

I am having problem in executing measurement based quantum computing circuit

qiskit algorithm circuit-construction

Joseph Geipel

811

answered yesterday

3 votes

0 answers

28 views

Specific relation between the classical Fourier transform for finite abelian groups and the QFT for finite abelian groups

mathematics quantum-fourier-transform

Kenanski Bowspleefi

31

modified yesterday

4 votes

1 answer

42 views

Is Density Matrix simulation same as Tensor Network simulation?

simulation density-matrix tensor-networks

dabacon

505

answered 18 hours ago

0 votes

0 answers

27 views

My IBM quantum account has been disabled for no apparent reason [closed]

ibm-q-experience ibm

Chase Williams

1

asked yesterday

0 votes

0 answers

38 views

Is there a proportionality how the number of quantum error corrections increases with the number of qubits? [closed]

error-correction

glS♦

18.6k

modified yesterday

0 votes

0 answers

22 views

Why can't one use the phase kickback if the function is not binary?

simons-algorithm phase-kickback

glS♦

18.6k

modified yesterday

1 vote

1 answer

145 views

how to prove quantum teleportation can't be achieved by sending only one classical bit

teleportation

glS♦

18.6k

modified 2 days ago

2 votes

0 answers

14 views

Simulation of non hermitian operators with Qiskit

hamiltonian-simulation unitarity

MMB

21

asked yesterday

2 votes

0 answers

22 views

Efficient quantum algorithms to decompose Hessian matrices into sums of unitaries

circuit-construction hamiltonian-simulation pauli-gates

glS♦

18.6k

modified 2 days ago

2 votes

1 answer

52 views

Confusion in Aaronson's CHP Paper

error-correction stabilizer-code

Adam Zalcman

13.6k

modified 2 days ago

0 votes

0 answers

49 views

Error: cannot import name 'BaseBackend' from 'qiskit.providers'

qiskit

Andrea Mameli

1

asked Jul 4 at 14:45

0 votes

0 answers

21 views

How to understand Tensor observables and Combined measurements from the perspective of quantum mechanics?

measurement pennylane

poig

551

modified 2 days ago

1 vote

0 answers

23 views

ZX-calculus: Commutation rules for ZH gate

gate-synthesis hadamard universal-gates zx-calculus

Daniele Cuomo

867

modified 2 days ago

0 votes

1 answer

50 views

How can orthonormal vectors satisfy $\langle i|j\rangle=\delta_{ij}$?

textbook-and-exercises nielsen-and-chuang linear-algebra inner-product

R.W

1,511

answered Jul 4 at 8:59

3 votes

0 answers

30 views

How is the surface of a Bloch sphere a Hilbert space?

bloch-sphere hilbert-space

glS♦

18.6k

modified Jul 4 at 9:19

1 vote

1 answer

18 views

Where are the multi-qubit openpulse computers?

ibm-q-experience openpulse

luciano

3,830

modified 2 days ago

2 votes

0 answers

30 views

No clonning states that one cannot clone any arbitrary given state. But can we have a device that can create same superposition state repetatively?

no-cloning-theorem

Troncho Col

21

modified Jul 4 at 8:46

4 votes

2 answers

167 views

What are the transversal gates of Shor's [[9,1,3]] code?

quantum-gate error-correction stabilizer-code fault-tolerance

Ian Gershon Teixeira

621

modified Jul 3 at 19:58

1 vote

0 answers

84 views

+50

PyZX optimisation steps for Clifford circuits

programming gate-synthesis zx-calculus

Daniele Cuomo

867

modified Jul 4 at 14:15

6 votes

3 answers

306 views

Finite subgroup of $U(4)$ containing a non-Clifford gate and all local Cliffords

quantum-gate quantum-circuit universal-gates clifford-group

Ian Gershon Teixeira

621

modified 14 hours ago

1 vote

0 answers

18 views

why Hamiltonian can be expressed by sum of outer product in two level systems?

hamiltonian-simulation projection-operator

Ironman1965

11

asked Jul 4 at 3:27

0 votes

2 answers

25 views

Where can I find runtime of ibm quantum gates?

quantum-gate hadamard qiskit-runtime

jyu00

741

answered 3 hours ago

0 votes

3 answers

45 views

AWS braket python sdk: user is not authorized to perform on quantum device

amazon-braket

voxter

101

answered 7 hours ago

1 vote

1 answer

36 views

Is this Quantum Neural Network overfitting?

qiskit programming machine-learning pennylane neural-network

MonteNero

318

modified Jul 2 at 20:37

0 votes

1 answer

31 views

How to get a corresponding unitary matrix from a tableau in stim?

stim

Craig Gidney

22.6k

answered Jul 2 at 15:10

1 vote

1 answer

36 views

Equivalence between quantum circuit: CNOT changes control and target qubit

textbook-and-exercises hadamard

Tristan Nemoz

2,706

answered Jul 2 at 13:19

2 votes

1 answer

35 views

Why does qutip run without errors, but cannot output a Bloch sphere graph?

qutip

poig

551

modified Jul 3 at 5:55

1 vote

0 answers

88 views

Bell test results question

bell-experiment

bburd

33

modified Jul 2 at 18:49

0 votes

0 answers

28 views

Accuracy of Classical Counting problem

grovers-algorithm nielsen-and-chuang classical-computing

Sooraj S

317

asked Jul 2 at 14:41

1 vote

1 answer

51 views

training parametric circuits in Qiskit

qiskit

R-X Zhao

181

modified Jul 1 at 13:28

1 vote

0 answers

25 views

QuTiP lecture: Single-Atom-Lasing

error-correction quantum-operation photonics quantum-optics nonclassicality

mehrosadat ebrahimi

11

modified Jul 2 at 17:16

0 votes

0 answers

21 views

Get qiskit-native gates from a circuit containing custom gates

qiskit

Shreyas Pradhan

83

asked Jul 2 at 19:42

1 vote

1 answer

35 views

The relationship between number of shots and performance of quantum agent

qiskit quantum-gate quantum-enhanced-machine-learning

Sam_QC

25

answered yesterday

-3 votes

0 answers

16 views

Can you tell the next set of number [closed]

programming

Steven

1

asked Jul 2 at 15:30

3 votes

2 answers

64 views

When we say that 4 qubits can represent $2^4$ binary bit sequences, how do we iterate to the desired bit sequence?

quantum-gate quantum-state quantum-parallelism

Chris E

246

modified Jun 30 at 4:38

Top Questions

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