Events at Physics |
Events on Thursday, September 3rd, 2026
- R. G. Herb Condensed Matter Seminar
- Strongly anharmonic flux-tunable transmon based on InAs-Al two-dimensional heterostructure
- Time: 10:00 am - 6:00 pm
- Place: 5310 Chamberlin Hall
- Speaker: Arunav Bordoloi, NYU
- Abstract: Superconducting qubits inherently face a longstanding tradeoff between anharmonicity and susceptibility to charge noise - a limitation that affects even state-of-the-art transmons and gatemons. In this talk, I will present a flux-frustrated transmon architecture [1] that overcomes this tradeoff by exploiting the interference of higher-order harmonics in highly transparent epitaxial Al-InAs Josephson junctions. Using this approach, we experimentally demonstrate anharmonicity exceeding 100% and reaching up to 800% of the qubit transition frequency at the half-integer flux sweet spot, without introducing additional sensitivity to offset-charge noise. The resulting large anharmonicity enables raw Rabi frequencies exceeding 100 MHz without complex pulse shaping, providing a simple and robust route toward faster qubit control. I will then discuss our ongoing efforts to extend this platform toward higher-temperature operation, with the goal of realizing superconducting qubits near 1 Kelvin to facilitate the scaling of quantum hardware. Finally, I will present preliminary results on gate-tunable superconductor–insulator transitions in epitaxial Al-InAs heterostructures, demonstrating the broader potential of this platform for exploring dissipative quantum phenomena and electrically tunable superconducting devices. [1] S. Liu*, A. Bordoloi* et al., Nature Communications 17, 740 (2026)
- Host: Roman Kuzmin
- Astronomy Colloquium
- Astronomy Colloquium: Show and Tell
- Time: 3:30 pm - 4:30 pm
- Place: 4421 Sterling Hall
- Abstract: The first two Thursday colloquia of the year will be held on September 3rd and September 10th, and will be our annual department orientation (also known as the "show and tell"). During these sessions, everyone will have 1.5 minutes to introduce themselves and provide a brief overview of their work. This is a great chance to get to know the diversity of research within our department, the faces behind the names, and everyone's favorite hobbies and interests.
- Host: Nicholas Stone