Events on Monday, October 27th, 2025
- Plasma Physics (Physics/ECE/NE 922) Seminar
- Title to be announced
- Time: 12:00 pm - 1:00 pm
- Place: 2241 Chamberlin Hall
- Speaker: Carlos Rovero-Talamas, UMBC
- Theory Seminar (High Energy/Cosmology)
- Title to be announced
- Time: 1:00 pm - 2:30 pm
- Place: Chamberlin 5280
- Speaker: Pouya Asadi, UC, Santa Cruz
- Abstract: TBA
- Host: Lisa L Everett
- Preliminary Exam
- Scalable autotuning of high-temperature quantum dot spin qubits
- Time: 2:00 pm - 4:00 pm
- Place:
- Speaker: Tyler Kovach
- Abstract: Developing automatic, scalable hardware control is a universal challenge when assembling the physical qubit layer of a large quantum computer. For quantum dot spin qubits—a semiconductor-based platform notable for its high device tunability and its compact size—one key hurdle arises from device non-uniformity. An example of this non-uniformity is the trapped charges in the device’s oxide layers, which induce offset voltage shifts on gate electrodes. These unknown offsets need to be accounted for and calibrated away before any qubits are formed. In this talk, I will introduce a streamlined, five-step physically intuitive algorithm for initializing and bootstrapping these devices, allowing for fully autonomous calibration and characterization. Next, I will demonstrate this methodology experimentally at a high temperature of 1.3K using our in-house developed automatic tuning system, BATIS (Bootstrapping Autonomously Testing Initialization System), to configure a four quantum dot Si/SiGe hetero-structure device. Finally, I will discuss our on-going development of FAlCon (Framework for Algorithmic Control), a soon-to-be open-source software platform designed to facilitate the design, deployment, sharing, and testing of quantum dot tuning algorithms. FAlCon’s platform-agnostic architecture addresses a critical bottleneck in quantum dot scalability, paving the way for the broader implementation of large quantum dot arrays.
- Host: Albrecht Karle