user avatar
user avatar
user avatar
chrysaor4
  • Member for 3 years, 11 months
  • Last seen this week
29 votes
5 answers
3k views

What's the point of Grover's algorithm if we have to search the list of elements to build the oracle?

  • 715
27 votes
6 answers
9k views

How do I build a gate from a matrix on Qiskit?

  • 655
22 votes
2 answers
4k views

What is the difference between transmon and Xmon qubits?

  • 19.1k
22 votes
3 answers
4k views

What are magic states?

  • 787
20 votes
2 answers
655 views

Can adiabatic quantum computing be faster than Grover's algorithm?

19 votes
4 answers
2k views

Alternative to Bloch sphere to represent a single qubit

  • 715
15 votes
0 answers
291 views

Reference that explains how to read 3d topological diagrams for surface code computations

  • 23.3k
14 votes
5 answers
594 views

Why do error correction protocols only work when the error rates are already significantly low to begin with?

  • 19.1k
12 votes
1 answer
2k views

Are circuits with more than 1000 gates common?

10 votes
2 answers
414 views

Are there any algorithms that take measurements in an intermediate step?

  • 291
9 votes
0 answers
419 views

Can we use quantum phase estimation to learn anything about the dynamics of puzzles like the Rubik's cube?

  • 7,444
9 votes
2 answers
339 views

If Majorana qubits are analogous to surface codes, why do the diagrams use lines instead of squares?

  • 23.3k
8 votes
3 answers
2k views

Calculating the expectation value of a unitary operator on a quantum computer

8 votes
2 answers
744 views

Expected repetitions of the quantum part of Shor's algorithm

  • 23.3k
8 votes
0 answers
341 views

Requirements for Achieving a Quantum Speedup

  • 47.5k
8 votes
0 answers
263 views

How does the invertibility of a quantum map reflect on its Kraus operators?

  • 19.1k
8 votes
2 answers
514 views

What is the relation between POVMs and observables (as Hermitian operators)?

  • 19.1k
7 votes
1 answer
295 views

Understanding classical vs. quantum channel capacities

7 votes
4 answers
293 views

Simulating a quantum circuit with decoherence and noise

7 votes
1 answer
987 views

Physical implementation of gates on IBM Q

6 votes
2 answers
241 views

Can we rotate Bloch vectors for qudits like we do with qubits in the Bloch sphere?

6 votes
1 answer
103 views

Why does code switching not allow for universal fault-tolerant quantum computation?

  • 297
6 votes
2 answers
845 views

How to define a quantum channel for the partial trace?

  • 89
6 votes
1 answer
301 views

What are examples of extremal non-projective POVMs?

  • 19.1k
6 votes
3 answers
758 views

Nielsen&Chuang 5-qubit quantum error-correction encoding gate

  • 618
6 votes
2 answers
399 views

Are three POVM measurements on a single qubit physically realizable?

  • 789
6 votes
2 answers
96 views

Can you make anyons in 3 dimensions using rings?

5 votes
2 answers
352 views

Determining whether there exists an equivalent set of unitary Kraus operators

  • 4,942
5 votes
2 answers
589 views

Inverting the depolarizing channel

  • 4,942
5 votes
3 answers
2k views

Why does quantum computing generally use matrix formulation of quantum mechanics rather than a continuous variable formulation?

  • 724