Welcome to Theoretical Quantum Science Group

Our research group focuses on understanding quantum phenomena in engineered quantum systems and developing ways to make them useful for quantum technologies. Physical systems that we focus on include ion-traps, superconducting quantum circuits, and defects in solids. Our research interest lies at the interface of quantum information science, quantum optics, and condensed matter physics.

Open positions

  • We are looking for a postdoctoral researcher to join Quantum Science Group at DKU. The candidate is expected to have expertise on quantum optics, open quantum systems, quantum many-body physics, and/or quantum information. If you are interested in, please send your CV to Prof. Hwang.
  • For DKU undergraduates, we have a number of projects for signature works and for independent research. Please contact Prof. Hwang for more information.


  • (Nov, 2020) Our group receives a research grant from National Science Foundation of China (NSFC) for the investigation of critical phenomena in controlled quantum systems.
  • (June, 2020) Our research on quantum statistical enhancement of a quantum machine is published in Physical Review Letters! This work shows that quantum indistinguishability can be harnessed to enhance the performance of quantum engines. This paper is a result of an international collaboration with Prof. Gentaro Watanabe (Zhejiang), Prof. Prassana Venkatesh (IIT Gandhinagar), Prof. Peter Talkner (Augsburg), and Prof. Adolfo del Campo (Bilbao).  Journal Ref : Physical Review Letters 124, 210603 (2020)


  • (November, 2019)  Our research on dynamical scaling laws of Out-of-Time-Ordered Correlators (OTOC) is published in Physical Review B. The OTOC has recently been recognized as an important object to characterize dynamics of non-integrable many-body system. In this work, we establish a dynamical scaling law for the OTOC in the vicinity of quantum critical point and show the universality of butterfly velocity in a chaotic model such as a transverse axial nearest-neighborhood Ising model. This work has been done with a collaboration with Prof. Bo-Bo Wei (Shenzhen) and Prof. Gaoyong Sun (Nanjing). Journal Ref : Physical Review B 100, 195107 (2020)