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nathan raynal
  • Member for 2 years, 4 months
  • Last seen more than a month ago
  • Grenoble, France
6 votes
3 answers
702 views

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

4 votes
1 answer
78 views

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

3 votes
1 answer
95 views

Confusing notation in Wikipedia's quantum channel article

3 votes
1 answer
157 views

Exercises on computing by hand quantum circuits

2 votes
1 answer
299 views

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

2 votes
1 answer
127 views

Computation of a reduced density matrix

2 votes
1 answer
159 views

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

2 votes
1 answer
130 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
92 views

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

2 votes
1 answer
560 views

Matrix definition of the Ising XX gate

1 vote
1 answer
59 views

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