#### 12/04 10:00 Soham Chanda (Rutgers University)

Symplectic Monday Seminar

#### 12/05 17:00 Jaeyoung Choi (POSTECH Graduate Student)

Ph.D. thesis defense

#### 12/05 15:30 D. Logachev (Visiting Professor of POSTECH)

2023 Fall POSTECH-PMI NUMBER THEORY LECTURE SERIES

#### 12/05 09:30 Jungtaek Hong, Jiwan Jung (포항공대, 수학과 / POSTECH, Math)

Number theory learning seminar

#### 12/06 16:00 Sung Woo Nam (포항공대, 수학과 / POSTECH, Math)

Algebraic Geometry Seminar

#### 11/16 16:00 Andreas Heinrich (IBS Center for Quantum Nanoscience at Ewha Womans Univ.))

Abstract : There is a strong international research effort in the area of quantum information science. Here, the concepts of quantum coherence, superposition and entanglement of quantum states are exploited. These concepts were originally shown with photons as well as atoms and ions in vacuum traps. Over the past two decades, many advances at studying such quantum coherence in solid-state and molecular architectures have evolved [1]. In this talk we will focus on quantum-coherent experiments in Scanning Tunneling Microscopy (STM). STM enables the study of surfaces with atomic-scale spatial resolution and offers the ability to study individual atoms and molecules on surfaces. Here at Ewha, we have one of the world’s best facilities for such studies. STM can also be used to move atoms with atomic-scale precision, which enables us to build engineered nanostructures where each atom is in the exactly correct place. In order to study qubits with STM, we recently learned how to combine STM with electron spin resonance [2,3]. Spin resonance gives us the means to quantum-coherently control an individual atomic or molecular spin on a surface. Using short pulses of microwave radiation further enables us to perform qubit rotations and learn about the quantum coherence times of our spins [4]. Finally, we will finish with unpublished results on multi-qubit operations with spins on surfaces. 1.Andreas J. Heinrich, William D. Oliver, Lieven M. K. Vandersypen, Arzhang Ardavan, Roberta Sessoli, Daniel Loss, Ania Bleszynski Jayich, Joaquin Fernandez-Rossier, Arne Laucht, Andrea Morello, “Quantum-coherent nanoscience”, Nature Nanotechnology, 16, 1318-1329 (2021). 2.Susanne Baumann, William Paul, Taeyoung Choi, Christopher P. Lutz, Arzhang Ardavan, Andreas J. Heinrich, “Electron Paramagnetic Resonance of Individual Atoms on a Surface”, Science 350, 417 (2015). 3.Yi Chen, Yujeong Bae, Andreas Heinrich, “Harnessing the Quantum Behavior of Spins on Surfaces”, Advanced Materials 2022, 2107534 (2022). 4.Kai Yang, William Paul, Soo-Hyon Phark, Philip Willke, Yujeong Bae, Taeyoung Choi, Taner Esat, Arzhang Ardavan, Andreas J. Heinrich, and Christopher P. Lutz, “Coherent spin manipulation of individual atoms on a surface”, Science 366, 509 (2019). Support from Institute for Basic Science (IBS-R027-D1) is gratefully acknowledged.

#### 12/15 15:00 Yun Sung Choi (POSTECH, Math)

The Bishop-Phelps Theorem

#### 12/01 15:00 Insuk Seo (Seoul National University Mathematical Science)

Metastability of Stochastic Dynamical Systems

#### 11/24 15:00 Sanghyuk Lee (Seoul National University Mathematical Science)

Boundedness of maximal averages

#### 11/17 15:00 Kyoung-Seog Lee (POSTECH, Math)

Low dimensional topology and algebraic geometry

#### 09/22 10:00 2023 POSTECH International Conference on Mathematical Machine Learning and AI

포스텍 컨퍼런스 수리 기계학습 및 인공지능 국제 학술대회

#### 01/30 09:00 The 18th ILJU School of Mathematics

ILJU School of Mathematics - ILJU School of Mathematics with Spanish Functional Analysis Network The aim of the 18th ILJU School of Mathematics is to introduce recent research problems on Banach space and related topics including basic materials so that the researchers are encouraged to share them and also to increase communication and friendship between participants. https://sites.google.com/view/2023ilju

#### 11/19 10:00 2022 POSTECH-PMI Lecture series A mini-course on

Title : “Complex abelian varieties and Siegel modular varieties” Dates and Time (Korean time) 2022.11.19 10:00am-11:30am Online Zoom 2022.11.26 10:00am-11:30am Online Zoom 2022.12.03 10:00am-11:30am Online Zoom 2022.12.10 10:00am-11:30am Online Zoom 2022.12.17 10:00am-11:30am Online Zoom

#### 12/28 09:00 The 10th(2022) NCTS--POSTECH-PMI Joint Workshop on Number Theory

https://ncts.ntu.edu.tw/events_2_detail.php?nid=357

#### 01/17 09:00 Ergodic Theory and Dynamical Systems

Title: Ergodic Theory and Dynamical Systems