Define cirq.PAULI_GATE_LIKE #2557
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- Generalize to allow lower case "ixyz"
- Generalize to allow integers 0=I, 1=X, 2=Y, 3=Z
Example:
```python
cirq.PauliString({
cirq.GridQubit(0, 0): 0,
cirq.GridQubit(0, 1): 1,
cirq.GridQubit(0, 2): 2,
cirq.GridQubit(0, 3): 3,
})
```
```
X((0, 1))*Y((0, 2))*Z((0, 3))
```
mpharrigan
approved these changes
Nov 15, 2019
| @@ -272,6 +284,14 @@ def __bool__(self): | |||
| def __len__(self) -> int: | |||
| return len(self._qubit_pauli_map) | |||
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| def _repr_pretty_(self, p: Any, cycle: bool) -> None: | |||
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can you explain? is this because jupyter shows the repr by default which is way too long because of the need for roundtrippability?
I have some prototype code that defines _repr_latex_ on paulistring which looks pretty nice
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Yeah, it's because the representation is shorter this way.
cirq/ops/pauli_string.py
Outdated
| _z = cast(pauli_gates.Pauli, pauli_gates.Z) # type: ignore | ||
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| PAULI_GATE_LIKE_TO_GATE_MAP: Dict['cirq.PAULI_GATE_LIKE', | ||
| Union['cirq.Pauli', 'cirq.IdentityGate']] = { |
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Yeah. yapf wants what it wants, who are we to judge.
| 3: _z, | ||
| } | ||
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| PAULI_GATE_LIKE_TO_INDEX_MAP: Dict['cirq.PAULI_GATE_LIKE', int] = { |
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define one of these using the other?
I_TO_PAULI = [_i, _x, _y, _z]
pauligateliketogate = {k: I_TO_PAULI[PAULI_GATE_LIKE_TO_INDEX_MAP]] for k in pgltim}
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cirq.PauliStringandcirq.DensePauliStringExample: