Cryogenic system for investigating trapped-electron quantum computing
Abstract
We propose to acquire a cryogenic system to explore quantum information processing with trapped electrons. The cryosystem is neccessary to cool the electrons to acceptable temperatures below 1 K such that they remain in a stable Wigner crystal. In our AFOSR sponsored research, we study trapped electrons for quantum information processing. Replacing trapped ions with electrons is highly beneficial because the light mass of the electron speeds up quantum operations while the fact that the electrons are a spin-1-2 system allows for high-fidelity operation. Further, all operations can be implemented with microwave operation only and hence do not require an elaborate optical control system as trapped ion systems do. Because electrons can not be cooled optically, we will need to cool them by coupling their motion to a cryogenic tank circuit. Our simulation of the cooling dynamics in a Paul trap have shown that the tank circuit needs to be held below 1 K such that the electrons form a Wigner crystal and do not swap positions. Further benefits of cooling the electrons below 1 K are a reduced impact of trap anharmonicities, increased gate fidelities and faster state detection. In order to enable these experiments, we propose to acquire a cryogenic system composed of a cryostat from Bluefors with a base temperature of 450 mK ($478k), an electron detection and control system ($83k), an electron source ($21k), and some support for fabrication of the electron trap ($11k). This is a fundamental research project that is not expected to produce any developmental items. Should any developmental items result from this work they will have both civilian and military applications.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 06, 2025
- Source ID
- FA95502510053
Entities
People
- Hartmut Haeffner
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of California Regents