Quick start using tqecd

Build your quantum circuit

The first step to use tqecd is to build a compatible quantum circuit.

In short, compatible quantum circuits should be sequences of blocks that all follow the same scheme: they start with a possibly empty sequence of resets, continue by a possibly empty sequence of “computation gates” (i.e., any gate that is not a reset or a measurement) and end with a non-empty sequence of measurements.

import stim

XXXX = stim.Circuit("""\
QUBIT_COORDS(1, 1) 0
QUBIT_COORDS(0, 0) 1
QUBIT_COORDS(2, 0) 2
QUBIT_COORDS(0, 2) 3
QUBIT_COORDS(2, 2) 4
RX 0 1 2 3 4
TICK
CX 0 1
TICK
CX 0 2
TICK
CX 0 3
TICK
CX 0 4
TICK
MX 0
""")

Call annotate_detectors_automatically

The next and last step is to call the annotate_detectors_automatically on your circuit.

annotated_circuit = annotate_detectors_automatically(XXXX)

And that’s it, annotated_circuit now represents the same computation, but also includes DETECTOR annotations for all the detectors that were found.