Quantum Computing Stack Exchange

3 votes

0 answers

34 views

How to construct a block-diagonal embedded Fourier matrix?

Gourav Sinha

31

asked 23 hours ago

2 votes

1 answer

88 views

Extracting syndromes by measuring gauge operators in subsystem codes

GaussStrife

1,402

answered yesterday

1 vote

2 answers

52 views

QFT of two superposed states

diemilio

3,430

modified yesterday

1 vote

2 answers

1k views

Associating quantum states with decimal numbers

Stev

11

modified 2 days ago

0 votes

0 answers

84 views

+50

Converting qubit eigenstate to pyscf eigenstate

GreenPhi

53

modified 2 days ago

2 votes

1 answer

116 views

Is Extropic's "thermodynamic computing" just a classical stochastic computer dressed in quantum buzzwords?

Daniel Park

11

modified 2 days ago

2 votes

1 answer

108 views

stim : confusion about the use of observables

AG47

1,937

answered 2 days ago

1 vote

1 answer

144 views

Difference between OBSERVABLE_INCLUDE rec[-1]... & X1 X2

CommunityBot

1

modified Nov 19 at 8:04

1 vote

1 answer

75 views

Drawbacks of writing a compiler in Smalltalk

AG47

1,937

answered Nov 18 at 14:34

5 votes

1 answer

457 views

Is a controlled Clifford gate in the third level of the Clifford hierarchy?

freishahiri

105

modified Nov 18 at 10:32

0 votes

1 answer

308 views

Solving max/min problem for graphs based on Grover

CommunityBot

1

modified Nov 16 at 11:01

5 votes

1 answer

448 views

Qiskit Portfolio Optimization Application

Adhisha Gammanpila

181

modified Nov 15 at 21:50

8 votes

1 answer

774 views

Inverses and the Clifford Hierarchy

Jonas Anderson

803

modified Nov 15 at 20:13

0 votes

0 answers

25 views

Do identical reduced system trajectories ρₛ(t) guarantee identical recoverability in small open quantum systems?

Jeroen van der Velde

1

modified Nov 15 at 16:01

1 vote

1 answer

395 views

What does a statevector with 3 elements (in Qiskit) represent?

CommunityBot

1

modified Nov 15 at 13:07

1 vote

2 answers

655 views

How to calculate the probabilities of observing quantum states using the "expectation_from_wavefunction" in cirq (and why)

CommunityBot

1

modified Nov 15 at 12:02

0 votes

0 answers

49 views

Understanding theorem 6 of postBQP=PP paper

Manish Kumar

953

modified Nov 15 at 7:55

1 vote

3 answers

366 views

Hadamard gate in Grover algorithm

CommunityBot

1

modified Nov 15 at 3:01

1 vote

2 answers

39 views

How to show used qubits in a transpiled circuit in Qiskit?

javier

23

answered Nov 14 at 17:48

0 votes

0 answers

47 views

Using restarts to prove QMA in PP

connorl42

1

asked Nov 14 at 17:04

0 votes

1 answer

26 views

Definition of lg in IBM quantum learning resources

diemilio

3,430

modified Nov 14 at 13:41

0 votes

0 answers

55 views

What is the biggest pain point for quantum developers? [closed]

Neha Chandran

1

asked Nov 14 at 3:37

1 vote

0 answers

30 views

Why have my Qiskit VQE results changed, even though I haven’t changed anything?

Wisdom

207

asked Nov 14 at 3:09

2 votes

1 answer

46 views

What is AIRouting doing step by step?

javier

23

answered Nov 13 at 20:53

2 votes

1 answer

93 views

If two QPUs can share entanglement, can any pair of qubits be entangled?

CommunityBot

1

answered Nov 12 at 21:57

3 votes

1 answer

96 views

Why superconducting qubits need periodic calibration?

CommunityBot

1

answered Nov 12 at 21:37

3 votes

1 answer

81 views

Excitation of a superconducting circuit

CommunityBot

1

answered Nov 12 at 21:28

3 votes

1 answer

127 views

Superconducting qubits and temperature

CommunityBot

1

answered Nov 12 at 21:23

1 vote

3 answers

166 views

Minimal ancilla-free CCCNOT (C³X) decomposition using controlled-S conjugation

Craig Gidney

50k

modified Nov 12 at 18:00

1 vote

0 answers

48 views

In Google Stim, is there a separate algorithm for handling measurement errors that occur before the final round?

Jayb

15

asked Nov 12 at 6:59

0 votes

0 answers

29 views

Is operator entanglement entropy related to a Choi state?

jrobins

1

modified Nov 11 at 23:08

4 votes

0 answers

94 views

The converse problem for the maximal Schmidt coefficient in antisymmetric subspaces

ZhiweiSong

41

modified Nov 11 at 10:33

5 votes

0 answers

174 views

Eastin Knill Theorem and global phase

Ian Gershon Teixeira

5,498

modified Nov 11 at 0:30

1 vote

1 answer

65 views

Confirm $f \otimes g$ is a linear map

Mark A

321

answered Nov 10 at 17:43

0 votes

0 answers

18 views

Methods for generating Random Tensor Network and trace diagrams

Ceasar

324

asked Nov 9 at 22:32

1 vote

1 answer

70 views

Stabilizer flow details when using detslice figures

Craig Gidney

50k

answered Nov 9 at 21:18

0 votes

1 answer

49 views

Asymptotic scaling of surface codes, why p and not 2p/3?

Shoham Jacoby

581

answered Nov 9 at 15:38

5 votes

1 answer

183 views

Is circuit cutting equivalent in anyway to quantum teleportation?

CommunityBot

1

modified Nov 9 at 13:06

1 vote

1 answer

52 views

Can sinter.Task tasks be saved in a file to be reused later on?

CommunityBot

1

modified Nov 9 at 12:03

1 vote

0 answers

38 views

Help debugging flat dissociation curve from IBM Quantum Runtime Batch

Ylva Marie

11

asked Nov 8 at 22:38

0 votes

1 answer

49 views

Is there a way to know the propagated errors at a certain place of a circuit in Stim?

Craig Gidney

50k

answered Nov 8 at 8:01

0 votes

1 answer

108 views

stim: understanding DEM probability calculations

Craig Gidney

50k

modified Nov 7 at 22:30

3 votes

2 answers

787 views

How to force PyMatching into the opposite equivalence class

Craig Gidney

50k

modified Nov 6 at 21:16

3 votes

1 answer

5k views

How does the c_if instruction work in Qiskit?

user40313

1

modified Nov 6 at 9:22

1 vote

1 answer

177 views

IS my QUBO too big for QAOA using IBM Quantum computer?

CommunityBot

1

modified Nov 6 at 9:10

0 votes

0 answers

86 views

Can Schmidt decomposition geometry predict quantum computational advantage?

Dan Beiser

1

asked Nov 6 at 6:59

28 votes

2 answers

2k views

Why is it important to eliminate the garbage qubits?

Stev

11

modified Nov 5 at 21:42

0 votes

0 answers

30 views

Measurement-induced dephasing rate: factor of 2 discrepancy in two published papers

Edmond

11

asked Nov 5 at 20:41

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