Resumen
Today's tremendous interdisciplinary effort towards building a quantum computer promises to tackle
problems beyond reach of any classical computer. Although intermediate-scale quantum computers have
been recently demonstrated to exceed the capability of the most powerful supercomputers, it is
widely recognized that addressing any real-world problem will require upscaling quantum computers
to thousands or even millions of qubits. This proposal focuses on the grand challenge of
scalability in quantum computers, from a full- stack architectural standpoint, and enabled by
communication networks operating within the quantum computing package at cryogenic temperatures.
The QUADRATURE project hence aims to pioneer a new generation of scalable quantum computing
architectures featuring distributed quantum cores (Qcores) interconnected via quantum-coherent
qubit state transfer links and orchestrated via an integrated wireless interconnect. This novel
architecture supports reconfigurability to serve massive flows of heterogeneous quantum algorithmic
demands. The main objectives are (i) to experimentally prove the first micro-integrated all-RF
qubit-state transfer link within a cryogenic tunable superconducting cavity waveguide in the
microwave and THz frequency region for quantum-coherent frequency-multiplex and routing (ii) to
achieve experimentally the transfer of classical data through wireless in-package links by
integrated cryo-antennas and tranceivers (iii) to build protocols for a quantum-coherent integrated
network enabling the exchange of qubits through the coordination of the quantum-coherent data plane
and the wireless control plane (iv) to develop appropriate scalable architectural methods such as
mapping, scheduling, and coordination approaches across multiple Qcores, and (v) to demonstrate the
scalability of the approach i-scale design space optimization and for a set of quantum algorithm
benchmarks, with at least 1Ox improvement in overall
performance.
