Events
Upcoming Events
Fall 2024 CUbit Quantum Seminar Series
All seminars are held in the CASE Auditorium. Light refreshments will be served starting at 3:30 p.m. Talk begins at 4 p.m.
This seminar series is sponsored by CUbit with generous support of the Caruso Foundation.
- Who: Professor Peter Rakich
- Title: Quantum Optomechanical Control of Bulk Acoustic Phonons
- Abstract: Cavity optomechanical techniques allow efficient control of phonons using light, transforming them into a versatile quantum resource. Efficient photon-phonon coupling permits the use of quantum optics methods to control solid-state phononic excitations, allowing for the manipulation and storage of nonclassical states using light. In this context, long-lived phonons are advantageous as they may permit numerous quantum operations within the phonon’s coherence time, enabling a new class of high-performance quantum sensors, transducers, and memories. However, a key barrier to realizing such new capabilities is protecting these phonons from problematic noise of noise and decoherence.
We present a new quantum optomechanical systems based on bulk acoustic wave resonators that have the potential to overcome these challenges and bring many unique features. Our new optomechanical system utilizes macroscopic high-overtone bulk acoustic-wave resonators (HBARs) are intriguing for their ability to support high frequencies (>10GHz) phonon modes with long coherence times while also minimizing unwanted surface interactions that can contribute to decoherence. In this work, we combine new non-invasive laser spectroscopy techniques with materials analysis to enable the realization of microfabricated HBAR resonators with Q-factors exceeding 140-million at 12.6 GHz frequencies, corresponding to phonon lifetimes of >1.8 milliseconds and a record-level fQ products of 1.8e18 Hz. Using new cavity optomechanical techniques to greatly enhance coupling rates to such ultra-massive (>10 microgram) phonon modes, we demonstrate mode-selective ground-state cooling, a critical advancement necessary to utilize such high coherence phonons as a quantum resource. Since this system demonstrate enhanced robustness to parasitic heating, they open an array of new possibilities for quantum control of phonons.
- Who: Dr. Lawrence Cheuk
- Title: Programmable Molecular Tweezer Arrays for Quantum Science
- Abstract: Polar molecules trapped in programmable optical tweezer arrays are an emerging platform for quantum science. In this talk, I will report our group’s work on advancing quantum control of molecular tweezer arrays and our first experiments on using these arrays for quantum information processing and simulation of quantum many-body Hamiltonians.I will first briefly present our work that establishes the essential building blocks for quantum science in this platform. These include preparation and detection of single molecules, control of their interactions, and the deterministic entanglement of pairs of molecules. Next, I will report on our subsequent efforts to further advance molecular control to a level necessary for quantum applications. In particular, I will focus on our recent work that uses mid-circuit measurement to both improve quantum state preparation and to implement erasure error detection and conversion in molecular qubits. Lastly, I will present recent work on simulating interacting quantum spin chains using 1D molecular arrays. Specifically, I will report on several phenomena that we have observed in the quantum dynamics of 1/r3 XX/XXZ/XYZ spin chains. These include coherent quantum walks of single spin excitations, appearance of repulsive bound states, and coherent pair creation and annihilation.
Past Events
Funded with the generous support of The Caruso Foundation.
2023-2024 Seminars
- Dr. Jeff Thompson, Associate Professor of Electrical and Computer Engineering, Princeton April 30, 2024
- Dr.Amir Safavi-Naeni, Associate Professor of Applied Physics and, by courtesy, of Electrical Engineering, Stanford April 16, 2024
- Antoine Browaeys (Group Leader, Quantum Optics – Atoms, Laboratoire Charles Fabry at Institut d’Optique) February 27, 2024
- Leticia Tarruell (Ultracold Quantum Gases, ICFO, Barcelona Institute of Science and Technology)December 11, 2023
- John Preskill (Caltech) November 13, 2023
- Christopher Monroe (Duke) October 23, 2023
2022-2023 Seminars
- Mikhail Lukin (Harvard) May 1, 2023
- Jon Simon (Stanford) April 10, 2023
- Amir Safavi-Naeini (Stanford) March 13, 2023 CANCELED due to illness.
- Sabrina Maniscalco (University of Helsinki) February 6, 2023
- Nathalie de Leon (Princeton University)January 30, 2023
- John Martinis (UC Santa Barbara)December 12, 2022
- Ana Garcia (Columbia University)December 5, 2022
- Ferdinand Kuemmeth (Niels Bohr Institute)November 7, 2022
- Kartik A. Srinivasan (NIST) October 24, 2022
- Mark Eriksson (University of Wisconsin-Madison) October 17, 2022
Quantum Computing Using Electron Spins in Silicon - Eugene Simon Polzik (Niels Bohr Institute) September 26, 2022
Quantum Physics with Macroscopic Objects - Rahul Nandkishore (CU Boulder) August 29, 2022
Fracton Dynamics
2021-2022 Seminars
- Hong Tang (Yale) April 25, 2022
Integrated Nonlinear Photonics for Quantum Frequency Conversion - Marko Loncar (Harvard) April 18, 2022
New Opportunities with Old Materials - John Doyle (Harvard)March 28, 2022
Cold and Ultra-Cold Molecules for Quantum Science - Krister Shalm (NIST)February 14, 2022
Quantum Entropy as a Service Jelena Vuckovic (Stanford) December 6, 2021
Scalable Semiconductor Quantum SystemsBen Bloom (Atom Computing) November 8, 2021
Optically Trapped Atomic QubitsWill Oliver (MIT)October 11, 2021
Giant Artifical Atoms and Waveguide QEDScott Diddams (NIST) September 13, 2021
Optical Frequency Combs 2.0
2019-2020 Seminars
- Ania Jayich (UCSB) February 26, 2019
- Andrei Faraon (Caltech) March 12, 2019
- Markus Greiner (Harvard) March 19, 2019
- Vladan Vuletic (MIT) April 2, 2019
- Kai-Mei Fu (UW Seattle) April 30, 2019
- Jack Harris (Yale) May 14, 2019
- Jonathan Home (ETH) May 14, 2019
- Nergis Mavalvala (MIT) September 30, 2019
- Dan Oron (Weizmann) October 28, 2019
- Franco Wong (MIT) November 4, 2019
- David Schuster (Chicago) November 18, 2019
- Andrew Wilson (NIST) December 2, 2019
- John Martinis (UCSB, Google) February 10, 2020
- Alexander Gaeta (Columbia) Scheduled February 24, 2020
- Aram Harrow (MIT) Scheduled March 9, 2020, postponed
- Jelena Vuckovic (Stanford) Scheduled April 13, 2020, postponed
- John Doyle (Harvard) Scheduled April 20, 2020, postponed