search

NVIDIA / cuda-quantum

C++ and Python support for the CUDA Quantum programming model for heterogeneous quantum-classical workflows
https://nvidia.github.io/cuda-quantum/
Other
568 stars 192 forks source link

Dynamic support of QPU topologies for the mapping pass #1589

Open bmhowe23 opened 7 months ago

bmhowe23 commented 7 months ago

Required prerequisites

Describe the feature

CUDA-Q currently supports specification of QPU mapping topologies via static configuration files in

It would be nicer if these topologies could be dynamically fetched from their corresponding host services, either via a standalone command-line tool and/or a library call that could be integrated into the runtime. (The most ideal solution is a common implementation that supports both options.)

owen-oqc commented 7 months ago

To illustrate this. The OQC SDK or the

from client.qcaas_client.client import OQCClient, QPUTask

# email = 
# password = 

def get_two_qubit_coupling(email: str, password: str) -> list:
    client = OQCClient(url='https://int.cloud.oqc.app/qpu',
                       email=email,
                       password=password)

    qpu_id = "qpu:uk:3:9829a5504g"

    calibration = client.get_calibration(qpu_id)
    # fetched from https://int.uk.cloud.oqc.app/9829a5504g/monitoring/calibrations
    return list(calibration['two_qubit'].keys())

get_two_qubit_coupling(email, password)

Return

['1-2', '10-1', '10-11', '12-13', '14-13', '14-15', '15-8', '16-17', '18-14', '19-11', '2-3', '20-19', '24-23', '24-27', '26-35', '27-34', '29-20', '29-30', '30-31', '31-30', '32-31', '33-32', '34-33', '34-35', '4-3', '4-5', '6-5', '7-16', '7-6', '8-5', '9-12', '9-2']

Shows unique couplings between different coupling similar to the static definitions here note the 1-based indexing in the above as opposed to the better zero based indexing in the cudaq routing file.

Since this is authentication protected here's a portion of the returned JSON to work against which could be included from this fake server utility as a new response 

{'1-2': {'coupling': {'control_qubit': 1, 'target_qubit': 2}, 'fCX': 0.0}, '10-1': {'coupling': {'control_qubit': 10, 'target_qubit': 1}, 'fCX': 0.9999977226364618}, '10-11': {'coupling': {'control_qubit': 10, 'target_qubit': 11}, 'fCX': 0.999999}, '12-13': {'coupling': {'control_qubit': 12, 'target_qubit': 13}, 'fCX': 0.999999}, '14-13': {'coupling': {'control_qubit': 14, 'target_qubit': 13}, 'fCX': 0.999999}, '14-15': {'coupling': {'control_qubit': 14, 'target_qubit': 15}, 'fCX': 0.999999}, '15-8': {'coupling': {'control_qubit': 15, 'target_qubit': 8}, 'fCX': 0.999999}, '16-17': {'coupling': {'control_qubit': 16, 'target_qubit': 17}, 'fCX': 0.999999}, '18-14': {'coupling': {'control_qubit': 18, 'target_qubit': 14}, 'fCX': 0.999999}, '19-11': {'coupling': {'control_qubit': 19, 'target_qubit': 11}, 'fCX': 0.999999}, '2-3': {'coupling': {'control_qubit': 2, 'target_qubit': 3}, 'fCX': 0.999999}, '20-19': {'coupling': {'control_qubit': 20, 'target_qubit': 19}, 'fCX': 0.999999}, '24-23': {'coupling': {'control_qubit': 24, 'target_qubit': 23}, 'fCX': 0.999999}, '24-27': {'coupling': {'control_qubit': 24, 'target_qubit': 27}, 'fCX': 0.999999}, '26-35': {'coupling': {'control_qubit': 26, 'target_qubit': 35}, 'fCX': 0.999999}, '27-34': {'coupling': {'control_qubit': 27, 'target_qubit': 34}, 'fCX': 0}, '29-20': {'coupling': {'control_qubit': 29, 'target_qubit': 20}, 'fCX': 0.999999}, '29-30': {'coupling': {'control_qubit': 29, 'target_qubit': 30}, 'fCX': 0.0}, '30-31': {'coupling': {'control_qubit': 30, 'target_qubit': 31}, 'fCX': None}, '31-30': {'coupling': {'control_qubit': 31, 'target_qubit': 30}, 'fCX': 0.999999}, '32-31': {'coupling': {'control_qubit': 32, 'target_qubit': 31}, 'fCX': 0.999999}, '33-32': {'coupling': {'control_qubit': 33, 'target_qubit': 32}, 'fCX': None}, '34-33': {'coupling': {'control_qubit': 34, 'target_qubit': 33}, 'fCX': None}, '34-35': {'coupling': {'control_qubit': 34, 'target_qubit': 35}, 'fCX': 0.999999}, '4-3': {'coupling': {'control_qubit': 4, 'target_qubit': 3}, 'fCX': 0.6733723548983703}, '4-5': {'coupling': {'control_qubit': 4, 'target_qubit': 5}, 'fCX': 0.250}, '6-5': {'coupling': {'control_qubit': 6, 'target_qubit': 5}, 'fCX': None}, '7-16': {'coupling': {'control_qubit': 7, 'target_qubit': 16}, 'fCX': 0.999999}, '7-6': {'coupling': {'control_qubit': 7, 'target_qubit': 6}, 'fCX': 0.999999}, '8-5': {'coupling': {'control_qubit': 8, 'target_qubit': 5}, 'fCX': 0.999999}, '9-12': {'coupling': {'control_qubit': 9, 'target_qubit': 12}, 'fCX': None}, '9-2': {'coupling': {'control_qubit': 9, 'target_qubit': 2}, 'fCX': 0.0}}
owen-oqc commented 7 months ago

What about using fCX to disconnect where we may have sporadic low fidelities (None, 0 or < some threshold)?

kukushechkin commented 7 months ago

From the IQM side — we've recently added the possibility to specify gates per pair/qubit and in the near future we plan to make the would architecture endpoint /quantum-architecture calibration-aware.

freetonik commented 7 months ago

Another comment from IQM side — in addition to what @kukushechkin said above, we also plan, in near future, to incorporate fidelity data into quantum architecture, explicitly list gate implementations, and separate QPU topology data from "gates". So, overall, it should be possible to fetch:

It may look something like this: /calibration/<UUID>/gates would return:

"gates": {
    "prx": {
        "implementations": {
            "drag_gaussian": {
                "priority": 0,
                "loci": [["QB1"], ["QB2"], ["QB3"], ["QB4"], ["QB5"], ["QB6"]]
            },
            "tgss_crf": {
                "priority": 1,
                "loci": [["QB1"], ["QB2"], ["QB3"], ["QB4"], ["QB5"], ["QB6"]]
            },
            ...
        }
    }, 
    ...
}

and /calibration/<UUID>/metrics would return:

"metrics": {
    ...
    "QB9-QB10.cz_gate_fidelity": {
        "value": "0.9784502054220903",
        "uncertainty": "0.0024997208080908347",
        "timestamp": "2024-04-29T14:50:28.381109"
    },
    ...
}
bmhowe23 commented 6 months ago

Just for clarification, this item is still available for anybody to grab and implement for UnityHack.