qrisp.multi_measurement#
- multi_measurement(qv_list, shots=10000, backend=None)[source]#
This functions facilitates the measurement of multiple QuantumVariables at the same time. This can be used if the entanglement structure between several QuantumVariables is of interest.
- Parameters
- qv_listlist[QuantumVariable]
A list of QuantumVariables.
- shotsint, optional
The amount of shots to perform. The default is 10000.
- backendBackendClient, optional
The backend to evaluate the compiled QuantumCircuit on. By default, the backend from default_backend.py will be used.
- Returns
- counts_listlist
A list of tuples. The first element of each tuple is a tuple again and contains the labels of the QuantumVariables. The second element is a float and indicates the probability of measurement.
- Raises
- Exception
Tried to perform measurement with open environments.
Examples
We entangle three QuantumFloats via addition and perform a multi-measurement:
>>> from qrisp import QuantumFloat, h, multi_measurement >>> qf_0 = QuantumFloat(4) >>> qf_1 = QuantumFloat(4) >>> qf_0[:] = 3 >>> qf_1[:] = 2 >>> h(qf_1[0]) >>> qf_sum = qf_0 + qf_1 >>> multi_measurement([qf_0, qf_1, qf_sum]) {(3, 2, 5): 0.5, (3, 3, 6): 0.5}