On-Chip Cryogenic Read-Out of Spin Qubit for Quantum Computers

On-Chip Cryogenic Read-Out of Spin Qubit for Quantum Computers

ValizadehPasha, B.

Charbon, E. (mentor)

Electrical Engineering, Mathematics and Computer Science

Microelectronics

2016-12-16

Quantum computing holds the promise to solve problems that are currently intractable by classical computing platforms. Such computing framework relies on the properties of quantum bits (qubits) that operates at cryogenic temperatures well below 1K. Besides a quantum processor, an operational quantum computer needs a classical electronic controller reading out the electrical signals generated by the qubits and the providing electrical control to perform the required operations on the qubits. Since today’s quantum processors comprise a low number of qubits (<10), most controlling electronics can operate at room temperature and be connected by bulky interconnects to the cryogenic qubit chamber. However, when scaling up to the thousands of qubits required in a practical quantum algorithm, the classical electronics must be placed at cryogenic temperature to simplify the interconnects and allow a compact, reliable and scalable system. In this work, we propose the fully-integrated implementation in standard CMOS technology of the electronic read-out for spin qubits. Simulations show that the proposed current read-out circuit can achieve a 10MHz bandwidth that is 10X wider than current state-of-the-art read-outs while keeping comparable noise performance and operating at 4.2K. Such results are a promising indication that cryogenic CMOS circuits can provide the building blocks for the integration of the classical electronic controller for future scalable quantum computers.

http://resolver.tudelft.nl/uuid:d77eb488-f5dd-42b5-a735-ad8c169536fd

2018-12-31

Student theses

master thesis

(c) 2016 ValizadehPasha, B.