Architecting Distributed Quantum Computers: Design Insights from Resource Estimation

Understand

In the emerging field of Fault Tolerant Quantum Computation (FTQC), resource estimation is an important tool for quantitatively comparing prospective architectures, identifying hardware bottlenecks and informing which research paths are most valuable.

• Despite a recent increase in attention on FTQC, there is currently a lack of resource estimation research for architectures that can realistically offer quantum advantage.
• In particular, current modelling efforts focus on monolithic quantum computers where all qubits reside on a single device.
• Constraints on fabrication yield, wiring density, and cooling power make monolithic devices unlikely to scale to fault-tolerant sizes in the foreseeable future.