Conferences, Workshops, Lectures (archive)

Room: Seminar rooms 1-2

Prof. Ioan Pop (KIT) - Superconducting qubits in high magnetic field

Abstract: Superconducting qubits equipped with quantum non-demolishing readout and active feedback can be used as information engines to probe and manipulate microscopic degrees of freedom, whether intentionally designed or naturally occurring in their environment. In the case of spin systems, the required magnetic field bias presents a significant challenge for superconductors and Josephson junctions. Using a nano-Josephson junction, of only 20 nm cross-section, and superconducting granular Aluminum films with critical field above 5 Tesla, we operate a flux qubit in magnetic field of up-to 1.2 Tesla. Remarkably, the spectrum and coherence of the qubit remain stable in this entire range, and we can observe the freezing of a paramagnetic spin ensemble coupled to the qubit. [more]

Kakali Santra - Topological Pathway to Enantioselective Crystallization

Ning Mao - Machine learning for phonon and magnon spectra

Prof. Tyrel M. McQueen (Johns Hopkins University) - New Frontiers of Materials Discovery

Abstract: Chemistry is all about understanding and controlling the properties of matter -- Where are the electrons? How do particular arrangements of atoms and bonds result in the zoo of behaviors known in matter? What new properties can be created by arranging atoms in unnatural configurations? Today, there are about 50 million known chemical compounds. Where and how will the next billion be discovered, and what new properties will they have [1]? In this talk, I will highlight the progress being made to address these questions, with a particular emphasis on the confluence of quantum materials, quantum information science, and data science. Examples will include our forays into closed loop coupling of human experiment and AI/ML prediction for superconductor discovery [2,3], the creation of approaches for the systematic design of complex materials [4], and the importance of advancing old and new materials synthesis methods [5,6]. As time permits, I will highlight how these methods come together to enable discovery of new chemistry, and new physics, and provide my perspective on the future of materials design, synthesis, and discovery. 1. https://dx.doi.org/10.1021/acs.accounts.8b00382 2. https://doi.org/10.1038/s41524-023-01131-3 3. https://openreview.net/forum?id=SfEsK3O2KT 4. https://doi.org/10.1021/jacs.4c08941 5. https://doi.org/10.1021/acs.chemmater.3c03077 6. https://doi.org/10.1038/s41535-022-00527-6 [more]
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