Stefan Isermann

Samples of matrix product states should return probabilities

3

### What is the expected behavior? If you sample a matrix product state, you get not only the value (bin, hex or int) of the measurement but also the exact...

### What is the expected behavior? I have seen that there is a function in the C++ code of the matrix product state to calculate exactly an expectation value of...

### What is the expected behavior? For larger bond dimensions and a larger number of qubits, the implemented smapling algorithm in qiskit is not efficient. It is not necessary to...

### What is the expected behavior? One may think of a random quantum channel without knowlege of some parameters. Because there is no implementation of such an error channel in...

Kraus decompostion of phase amplitude damping error is not appropriate

4

### What is the expected behavior? The `phase_amplitude_damping_error(param_amp, param_phase, excited_state_population=0, canonical_kraus=True)` in Qiskit allows only the parameter range $p_a + p_p \le 1$, although all parameters $p_a, p_p \in [0,1]$...