Quantum Computing Stack Exchange is a question and answer site for engineers, scientists, programmers, and computing professionals interested in quantum computing. It only takes a minute to sign up.

Sign up to join this community
Anybody can ask a question
Anybody can answer
The best answers are voted up and rise to the top
Quantum Computing

Top Questions

Ask Question
Active 2 Bountied Hot Week Month
4 votes
2 answers
174 views

Does the von Neumann entropy equal the smallest accessible Shannon entropy?

user avatar
glS♦
  • 18.6k
0 votes
1 answer
33 views

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

user avatar
Rammus
  • 3,957
0 votes
1 answer
38 views

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

user avatar
Condo
  • 1,537
2 votes
2 answers
35 views

Classical Information Theory vs. Quantum Information Theory

user avatar
glS♦
  • 18.6k
3 votes
2 answers
812 views

How is a quantum simulator able to simulate a quantum mechanical properties on a classical computer?

user avatar
Glorfindel
  • 562
1 vote
0 answers
34 views

Doesn't a beamsplitter contradict the nocloning theorem?

user avatar
eternalstudent
  • 13
0 votes
1 answer
15 views

Understanding Paddle Quantum's MBQC simulation

user avatar
Kun
  • 26
0 votes
2 answers
25 views

Where can I find runtime of ibm quantum gates?

user avatar
jyu00
  • 741
0 votes
3 answers
45 views

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

user avatar
voxter
  • 101
0 votes
0 answers
8 views

qiskit vs dimod: ising matrix in 2 libaries are different

user avatar
voxter
  • 101
1 vote
1 answer
58 views
+200

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

user avatar
Rammus
  • 3,957
1 vote
0 answers
19 views

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

user avatar
glS♦
  • 18.6k
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 $|11\rangle$?

user avatar
glS♦
  • 18.6k
0 votes
0 answers
12 views

qiskit: convert from ising result to qubo result?

user avatar
voxter
  • 101
6 votes
3 answers
306 views

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

user avatar
Ian Gershon Teixeira
  • 621
4 votes
1 answer
71 views

Estimate run time of Cirq circuit on forthcoming Google quantum computer

user avatar
dabacon
  • 505
4 votes
1 answer
42 views

Is Density Matrix simulation same as Tensor Network simulation?

user avatar
dabacon
  • 505
8 votes
0 answers
50 views

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

user avatar
Mark S
  • 7,137
1 vote
3 answers
44 views

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

user avatar
WQian
  • 1
1 vote
2 answers
716 views

Relation between trace distance and inner product between pure states

user avatar
glS♦
  • 18.6k
1 vote
0 answers
14 views

Does QSVT/QSP require singular/eigen decomposition?

user avatar
Cuhrazatee
  • 470
1 vote
1 answer
89 views

Qiskit: Mismatch between run_config.parameter_binds and all circuit parameters

user avatar
tobias97d
  • 1
0 votes
0 answers
38 views

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

user avatar
glS♦
  • 18.6k
2 votes
1 answer
58 views

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

user avatar
glS♦
  • 18.6k
3 votes
0 answers
28 views

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

user avatar
Kenanski Bowspleefi
  • 31
2 votes
1 answer
42 views

I am having problem in executing measurement based quantum computing circuit

user avatar
Joseph Geipel
  • 811
0 votes
0 answers
22 views

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

user avatar
glS♦
  • 18.6k
4 votes
0 answers
42 views

What is a diference between solitons and anyons?

user avatar
Martin Vesely
  • 11.6k
1 vote
1 answer
35 views

The relationship between number of shots and performance of quantum agent

user avatar
Sam_QC
  • 25
18 votes
11 answers
10k views

Is my background sufficient to start quantum computing?

user avatar
Sam_QC
  • 25
2 votes
0 answers
14 views

Simulation of non hermitian operators with Qiskit

user avatar
MMB
  • 21
0 votes
0 answers
27 views

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

user avatar
Chase Williams
  • 1
0 votes
0 answers
21 views

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

user avatar
poig
  • 551
2 votes
0 answers
22 views

Efficient quantum algorithms to decompose Hessian matrices into sums of unitaries

user avatar
glS♦
  • 18.6k
4 votes
3 answers
246 views

Where I can read about protein folding on quantum computers with simple examples?

user avatar
Durd3nT
  • 491
1 vote
0 answers
10 views

Encode Matrix Elements on register

user avatar
noobier
  • 107
1 vote
2 answers
48 views

How are black-box oracles implemented in Hamiltonian simulation?

user avatar
noobier
  • 107
4 votes
1 answer
175 views

Preparation of states that correspond to efficiently integrable probability distributions

user avatar
CommunityBot
  • 1
1 vote
1 answer
145 views

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

user avatar
glS♦
  • 18.6k
7 votes
2 answers
1k views

What is a Haar random quantum state?

user avatar
George Biswas
  • 7
3 votes
2 answers
151 views

Angular Error associated with Quantum Search Algorithm

user avatar
Sooraj S
  • 317
1 vote
0 answers
23 views

ZX-calculus: Commutation rules for ZH gate

user avatar
Daniele Cuomo
  • 867
2 votes
1 answer
52 views

Confusion in Aaronson's CHP Paper

user avatar
Adam Zalcman
  • 13.6k
1 vote
1 answer
18 views

Where are the multi-qubit openpulse computers?

user avatar
luciano
  • 3,830
0 votes
0 answers
62 views

How to train a Quantum Neural network for regression model in supervised learning

user avatar
Glorfindel
  • 562
7 votes
1 answer
476 views

Relating min-entropy with conditional entropy

user avatar
glS♦
  • 18.6k
4 votes
2 answers
95 views

Why does fault-tolerant transversal phase gate $P$ only work with doubly-even codes?

user avatar
Ian Gershon Teixeira
  • 621
4 votes
2 answers
89 views

What are the best-known lower bounds on the number of measurements required for quantum state tomography?

user avatar
R.W
  • 1,511

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

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.