get list of measured bistrings from Aquila

[balewski]

For some analysis, say evaluation of stability of the HW, one needs to see the bistrings from all shots, presented as a list. Currently you provide only the summary in the form of dictionary of all unique bistrings and the number of occurences. It is done by get_counts(): https://amazon-braket-sdk-python.readthedocs.io/en/latest/_modules/braket/tasks/analog_hamiltonian_simulation_quantum_task_result.html#AnalogHamiltonianSimulationQuantumTaskResult.get_counts Can you provide also new function get_shots(), which would differ very little from get_counts(), namely instead of accumulating the dictionary:

state_counts = Counter()
 for shot in self.measurements:
 ...
      state_counts.update((state,))
return dict(state_counts)

it would append a list:

state_list = []
 for shot in self.measurements:
 ...
      state_list.append(state)
return state_list

I can hack it for now, but this type of functionality is of general use. E.g. it is available in Qiskit or TKet. Thanks, Jan

[kshitijc]

Thank you for raising this issue @balewski! We would be glad to include this functionality. Since you have already hacked it together, would you like to contribute it to the SDK?

[balewski]

I'm not that skilled with code commit. Here is my hacked version - use it as you like Jan

...!...!..................

def hacked_get_shots(measurements): state_list=[] states = ["e", "r", "g"] for shot in measurements: if shot.status == AnalogHamiltonianSimulationShotStatus.SUCCESS: pre = shot.pre_sequence post = shot.post_sequence

converting presequence and postsequence measurements to state_idx

        state_idx = [
            0 if pre_i == 0 else 1 if post_i == 0 else 2 for pre_i, post_i in zip(pre, post)
        ]
        state = "".join(map(lambda s_idx: states[s_idx], state_idx))
        state_list.append(state)

return state_list

On Sep 29, 2023, at 2:32 PM, Kshitij Chhabra @.***> wrote:

Thank you for raising this issue @balewski https://github.com/balewski! We would be glad to include this functionality. Since you have already hacked it together, would you like to contribute it to the SDK?

— Reply to this email directly, view it on GitHub https://github.com/amazon-braket/amazon-braket-examples/issues/369#issuecomment-1741511472, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAAMOFCKRFX4FOS3OCIDJBLX4445RANCNFSM6AAAAAA5M6QZDM. You are receiving this because you were mentioned.

[kshitijc]

Thanks a lot Jan! This is super helpful. Since this doesn't block you, I'll keep this open if someone else would like to contribute this to the SDK.