quantumlib/qsim

QSimSimulator does not respect invert_mask on measurements

Closed this issue · 1 comments

maffoo commented

Simple example:

In [1]: import cirq, qsimcirq

In [2]: circuit = cirq.Circuit(cirq.measure(cirq.LineQubit(0), key='a', invert_mask=[True]))

In [3]: cirq.Simulator().sample(circuit, repetitions=5)
Out[3]: 
   a
0  1
1  1
2  1
3  1
4  1

In [4]: qsimcirq.QSimSimulator().sample(circuit, repetitions=5)
Out[4]: 
   a
0  0
1  0
2  0
3  0
4  0
dabacon commented

qsimcirq in good company with all of the other times we forgot to implement invert_mask!

  • 😄1