Ewha Womans University

Overview of Quantum Technology Research

In the era of Quantum technology, Ewha Womans University has pursued development of quantum physics and technologies, utilizing from atomic qubits to nanoscale devices. At Ewha, a trapped ion quantum computing research center has established in March/2022, developing a 10 ion qubit quantum computer and recently successfully trapped more than 5 qubits, working on high-fidelity quantum entanglement. The IBS Center for Quantum Nanoscience (QNS) was established in 2017 under director Andreas Heinrich’s scientific leadership, with a team over 50 domestic and international members, it has become the global leader in the field of quantum-coherent nanoscience of atoms and molecules on surfaces.


Professors and Laboratories

Department of Physics / professor Taeyeong Choi

Trapped ion-based Quantum Computer, Cryogenic ion trap, Trapped ion-based scanning probe microscopy, Electron spin resonance-scanning probe.




Homepage https://sites.google.com/view/tiqcl

Overall research theme : We are an experimental physics group building a Trapped Ion-based Quantum Computer. Quantum computer has been theoretically known to calculate specific tasks exponentially faster than conventional computers and solve problems that might not be solvable using conventional computers. There have been various physical platforms to construct the Quantum Computer. Among these, we use trapped ion quantum bits (qubits) to experimentally build the practical Quantum computer. Trapped ions in electromagnetic forces under ultrahigh vacuum are well isolated from their environment, enabling special field-insensitive energy states to achieve the longest coherence times among candidate systems. In addition, the electronic states of the trapped ions can be initialized and measured with high accuracy by using a coherent light source (laser). With these advantages, we are working on performing high-fidelity quantum logic gates – quantum superposition and quantum entanglement which are basis for universal quantum computation.