What info should live in a quantum hardware schema?

[jordandsullivan]

Thinking about what information we need in a quantum hardware specification/schema in order to effectively do hardware-aware compilation on different device types, one example is Amazon Braket's device object, but having additional information may be useful too.

One lightweight proposal:

• connectivity/topology
• qubit type
• T1 & T2 times and when they were last updated
• Fidelities for each of their native gates on all qubits

[hrushikesh890]

One quick addition to the proposal would be the frequency of the qubits (highly relevant to superconducting circuits) as it can help compilers place operations such that crosstalk is minimized. This was proposed by Zhang et al in Qplacer: Frequency-Aware Component Placement for Superconducting Quantum Computers [https://arxiv.org/abs/2401.17450v2]