Nu Quantum, a British startup that builds networking infrastructure to link and scale quantum computers, raised $60 million in one of the largest Series A rounds raised in the UK, as investors bet on advances in the frontier technology. National Grid Plc’s Silicon Valley-based venture arm, National Grid Partners, was the lead investor as the UK utilities firm explores using quantum computers for energy and grid optimization, Nu Quantum said in a statement Wednesday. Venture capital firms Morpheu...