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Top Questions

1 vote
2 answers
723 views

Where do I create my first circuit?

3 votes
3 answers
238 views

How to mathematically describe the action of CNOT on the control qubit alone?

2 votes
2 answers
281 views

How to calculate the Schmidt decomposition of a state without SVD

1 vote
1 answer
234 views

Why is the Pauli Y gate eigenstate so hard to create?

3 votes
1 answer
89 views
+50

What's the cost of finding $(x,y)$ such that $g(f(x),y)=1$ via Grover?

1 vote
2 answers
86 views

Can Bell states be reexpressed with respect to arbitrary local bases?

1 vote
1 answer
64 views

Constructing a block unitary from non-unitary matrices

2 votes
1 answer
98 views

Why is the Choi matrix different from the analytic form for a depolarizing channel?

2 votes
1 answer
86 views

Alternative gate sets for universal Clifford computation?

3 votes
3 answers
64 views

Interpretation of a circuit that yields the same result for initializations $|+\rangle$ and $|-\rangle$

2 votes
1 answer
44 views

Is there a qiskit method to obtain the generator (ie. Pauli operator) of a gate?

2 votes
1 answer
38 views

Measuring stabilizers for qutrit stabilizer code

0 votes
1 answer
39 views

doesn't a reset on an entangled qubit collapse a superposition?

0 votes
1 answer
35 views

Resource for geometric representation of quantum channels

1 vote
1 answer
57 views

Pauli Strings on the same qubit?

2 votes
2 answers
42 views

Calculating number of CNOT gates in Pauli evolution gate

2 votes
1 answer
29 views

Is the adjoint of a strictly positive channel again strictly positive?

0 votes
0 answers
44 views

How to physically implement a CNOT gate with a photon and a cold atom?

0 votes
2 answers
25 views

What is meant with "different ensembles can give rise to the same density matrix?"

2 votes
0 answers
40 views

Most relevant conference for Quantum Computing

0 votes
1 answer
39 views

Confusion about lattice-surgery operation

0 votes
0 answers
39 views

The X-Y Hamiltonian with Jordan-Wigner Transformation

1 vote
1 answer
26 views

quantum phase estimation overperiod value estimation

1 vote
1 answer
33 views

Efficiently Generating Expectation Values of Operators Using Stim

2 votes
0 answers
33 views

Are these two codes the same?

2 votes
0 answers
32 views

Codes from orthogonal stabilizer states

0 votes
0 answers
31 views

How to interpret result for an OR problem solved in Qiskit

1 vote
0 answers
30 views
+50

Solving quantum equation using qiskit

0 votes
1 answer
22 views

Implementing CNOT logical gate for the Steane code

-3 votes
0 answers
28 views

Difficulty in understanding Quantum Phase Estimation [closed]

1 vote
1 answer
18 views

How to calculate the number of m-partitions of an N-partite quantum state?

0 votes
1 answer
21 views

Bernstein-Vazirani Algorithm not giving the right results in Qiskit Aer

2 votes
0 answers
21 views

How to initilize logical qubits stabilizer states in a fault-tolerant way

1 vote
1 answer
16 views

How to get partial probability from measurements in qiskit?

1 vote
0 answers
19 views

Experimental implementation of addition on a quantum computer

0 votes
1 answer
19 views

error correction after lattice surgery for merging

0 votes
1 answer
18 views

How to understand the matrix representation of the Toffoli produced by qiskit?

1 vote
0 answers
18 views

What could be intermediate steps towards a fully fault-tolerant quantum algorithm with added value for each step?

0 votes
0 answers
17 views

How to convert each of the pure states ||0011⟩,||1100⟩,||0101⟩ each to ||1111⟩ using qiskit

1 vote
0 answers
17 views

Reasoning behind unitary freedom in the ensemble for density matrices theorem

1 vote
0 answers
16 views

On Quantum Approximability Classes

2 votes
0 answers
16 views

Variational Quantum Linear Solver

0 votes
1 answer
16 views

Moving pauli product rotations past measurements

1 vote
0 answers
15 views

Are reset gates allowed on IBM quantum computers?

2 votes
0 answers
15 views

How to apply gates on a subspace of a superposition of qubits?

0 votes
1 answer
15 views

Parallelizing decode_to_edges_array (PyMatching)

1 vote
0 answers
14 views

Cirac-Zoller CNOT gate implemented by Schmidt-Kaler


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