Our Visitors

Affiliation: Institute for Quantum Computing/University of Waterloo & the Perimeter Institute for Theoretical Physics

Talk: July 1, 2019

Many-body quantum electrodynamics (QED) with atoms and photons: A new platform for quantum optics

An exciting frontier in quantum information science is the creation and manipulation of quantum systems that are built and controlled quanta by quanta. In this context, there is an active research worldwide to achieve strong and coherent coupling between light and matter as the building block of complex quantum systems. Despite the range of physical behaviours accessible by these QED systems, the low-energy description is inherently masked by mean fields or renormalization groups

In contrast, I describe our comprehensive theory/experiment program towards synthetic quantum matter, where highly-correlated Rydberg quantum material is strongly coupled to quantized optical cavity fields. We call this new domain of quantum optics, “many-body quantum electrodynamics,” where locally gauged quantum materials are entirely driven by quantum optical fluctuations. I describe our initial laboratory effort towards stabilizing a 2D U(1) quantum spin liquid and the observation of cavity-mediated multiparticle plaquette dynamics, corresponding to an emergent visonic topological defect excitation, for the magnetic flux of the compact dynamical gauge field.

From a broader perspective, our work towards many-body QED will open exhilarating opportunities in atomic and condensed matter physics, and quantum information science to explore the consequential features of macroscopic universes living within strongly-correlated systems, and to help answer some of the most profound questions in physics and computer science — from Baryonic asymmetry, to quantum gravity, and to the quantum Church-Turing thesis. We believe that many-body QED is an essential endeavour for our very instinct to explore genuinely surprising phenomena arising from highly-entangled quantum matter, by light.

Academic Affiliation: École polytechnique fédérale de Lausanne

Research area: Investigation of magnetic properties of nanostructures with low-temperature scanning tunneling microscopy and spectroscopy

Visit Dates: August 31 – September 2

Information about a talk will be updated soon

Date: September 25 – 27, 2019

Location: Center for Quantum Nanoscience at Ewha Womans University in Seoul, South Korea

Website: https://icqns.org/

Our Invited Speakers:

• Ali Yazdani – Physics Department of Princeton Univ. USA
• Andreas Heinrich – Director of IBS Center for Quantum Nanoscience, Korea
• Andrew Dzurak – School of Electrical Engineering and Telecommunications, UNSW, Australia
• Ania Jayich – Department of Physics, UCSB, USA
• Arzhang Ardavan – Department of Physics, Oxford Univ., UK
• Daniel Loss – Department of Physics, Univ. of Basel, Switzerland
• Donghun Lee – Physics Department of Korea Univ., Korea
• Fabio Donati – Center for QNS / Department of Physics at Ewha Univ. Korea
• Jelena Klinovaja – Department of Physics, Univ. of Basel, Switzerland
• Jörg Wrachtrup – Physics Department of University of Stuttgart, Germany
• Martin Plenio – Institute of Theoretical Physics in University of Ulm, Germany
• Roberta Sessoli – Department of Chemistry, Univ. of Florence, Italy
• Taeyoung Choi – Center for QNS / Department of Physics at Ewha Univ., Korea
• Taner Esat – Center for QNS, Korea
• William D. Oliver – Department of Physics, Director at MIT Lincoln Lab, USA
• Wolfgang Wernsdorfer – Department of Physics, KIT Karlsruhe, Germany
• Yonuk Chong – University of Science and Technology(UST), Korea
• Yujeong Bae – Center for QNS, Korea