R. G. Herb Condensed Matter Seminars |
Events During the Week of April 20th through April 27th, 2025
Monday, April 21st, 2025
- No events scheduled
Tuesday, April 22nd, 2025
- No events scheduled
Wednesday, April 23rd, 2025
- Creating hybrid quantum technologies with integrated diamond membranes
- Time: 10:00 am - 6:00 pm
- Place: 5310 Chamberlin Hall
- Speaker: Alex High , University of Chicago
- Abstract: In this seminar, I will introduce how we create diamond membranes with unprecedented quality and integrate them into hybrid quantum and electronic technologies. Diamond has exceptional material properties as a host for qubits yet presents myriad challenges for integration and scalable manufacturing. The continued evolution of quantum and electronic technologies in diamond requires heterogenous material platforms for sophisticated functionalities, device integration and packaging, and improved performance. At UChicago and Argonne National Laboratory, we are creating pristine single-crystal diamond membranes that host coherent color center qubits and integrating them with a wide range of materials including silicon, fused silica, sapphire, thermal oxide, lithium niobate, tantalum, and YIG. The membrane uniformity and robustness to fabrication allows us to create state-of-the-art technologies - such as integrated photonics with record performance, multi-functional quantum sensing platforms, and quantum networking interfaces that operate at 4 Kelvin instead of resource-intensive dilution fridge temperatures. I will also demonstrate how diamond color centers can operate as high-performance optical antennas to manipulate and study their proximal environment.
- Host: Tiancheng Song
Thursday, April 24th, 2025
- Certified randomness using a trapped-ion quantum processor
- Time: 10:00 am - 6:00 pm
- Place: 5310 Chamberlin Hall
- Speaker: Minzhao (Henry) Liu, JPMorganChase
- Abstract: While quantum computers have the potential to perform a wide range of practically important tasks beyond the capabilities of classical computers, realizing this potential remains a challenge. One application is the generation of remotely certifiably random bits, which are appealing for applications involving mutually untrusting parties. Recently, leveraging the classical hardness of random circuit sampling, 70 kbits of certifiably random bits, which are secure against a realistic adversary using best-known attacks, was generated using a remotely accessed untrusted trapped-ion quantum processor. We will discuss the experimental protocol, security analysis, conditions for success, and outlook. We also identify promising applications in areas including cryptography, differential privacy, and blockchain that may benefit from certified randomness, improving the security and fairness.
- Host: Matt Otten
Friday, April 25th, 2025
- No events scheduled