Quantum Chip Topologies | HeavyHex, Grid & Coupling Graphs
Quick Technical Answer:
Quantum chip topologies define the physical coupling graph between qubits on a quantum processor. Sparse graphs like IBM's HeavyHex minimize frequency collisions and parasitic crosstalk at the cost of requiring SWAP routing for distant entangling gates.
Formula / Unitary:
\text{HeavyHex Degree} = 3, \quad \text{Grid Degree} = 4, \quad \text{All-to-All Degree} = N-1
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Frequently Asked Questions
How does Itachi Quantum Studio optimize circuits for HeavyHex topologies?
Itachi integrates a lookahead SABRE routing algorithm that heuristically selects SWAP insertions to route multi-qubit gates while minimizing additional circuit depth.