Position-Based CMOS Charge Qubits for Scalable Quantum Processors at 4K

We describe a quantum computing hardware paradigm that exploits the current scaling achievements of mainstream CMOS technology. Just like in a small IC chip, where a single nanometer-sized CMOS transistor can be reliably replicated millions of times to build a digital processor, we propose a new structure of a qubit realized as a CMOS-compatible charge-based quantum dot that can be reliably replicated thousands (or perhaps even millions) of times to construct a quantum processor. Combined with an on-chip CMOS controller, it will realize a useful quantum computer (QC) that can operate at 4 K, which is much higher than the temperature of today's QCs of 15 mK.