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nathan raynal's user avatar
nathan raynal's user avatar
nathan raynal's user avatar
nathan raynal
  • Member for 4 years, 2 months
  • Last seen more than 1 year ago
  • Grenoble, France
7 votes
3 answers
2k views

What's the observable when measuring multiple qubits in the computational basis?

4 votes
1 answer
2k views

Computation of a reduced density matrix

4 votes
1 answer
84 views

How should I understand the link between $x$ and $| x \rangle $?

3 votes
1 answer
131 views

Confusing notation in Wikipedia's quantum channel article

3 votes
1 answer
308 views

What does the notation $\sigma_j^z$ mean for Pauli matrices?

3 votes
1 answer
671 views

symbolic quantum computing using sympy : how to use arbitrary gate?

3 votes
1 answer
231 views

Exercises on computing by hand quantum circuits

2 votes
1 answer
148 views

What does the notation $U(B,\beta) = \prod_{j =1}^n e^{-i \beta \sigma_j^x} $ mean in the context of QAOA?

2 votes
1 answer
130 views

What does the maximum of a Hamiltonian means (in a particular paper)?

2 votes
1 answer
1k views

Matrix definition of the Ising XX gate

1 vote
1 answer
87 views

computing a quantum circuit by hand (CNOT on non-computational basis states)