tqecd.fragment.Fragment

class Fragment(circuit: Circuit)

__init__(circuit: Circuit)

A sub-circuit guaranteed to end with a moment filled by measurement instructions.

Fragment instances represent sub-circuits that contain:

1. zero or more moments composed of reset and any other instructions

   except measurement instructions,

2. zero or more moments composed of “computation” instructions (anything

   that is not a measurement or a reset),

3. one moment composed of measurement and any other instructions

   except reset instructions.

Raises:

• TQECDException – if the provided stim.Circuit instance contains a stim.CircuitRepeatBlock instance.

• TQECDException – if any moment from the provided circuit contains both a reset and a measurement operation.

• TQECDException – if the provided circuit does not end with at least one measurement.

Parameters:

circuit – the circuit represented by the instance.

Methods

__init__(circuit)	A sub-circuit guaranteed to end with a moment filled by measurement instructions.
get_tableau()

Attributes

circuit
measurements	Get the measurement instructions at the back on the Fragment.
measurements_qubits
num_measurements
resets	Get the reset instructions at the front on the Fragment.