演講主題：固體表面之超快光電子能譜術 Photoemission at solid surfaces with ultrafast lasers 主講人：中央研究院原分所 助研究員 江正天博士 演講時間：113年1月3日(三)14:10 演講地點：志希樓2F 理學院會議室 摘要： Photoelectron spectroscopy is a general tool to study the electronic structure of materials. Starting from the earlier development for gases and molecules, the energy and momentum analyses of photoelectrons have been providing rich information about the electronic states which can be directly compared with quantum mechanical calculations . As a significant extension of the conventional experiments using synchrotron radiation or gas ionization lamps, there has been tremendous progress with laser-based photoelectron spectroscopy. By using femtosecond laser pulses as a light source, not only the electronic band structure can be explored but also their dynamics [2,3]. In this talk, electron dynamics in solids as well as photoelectron spectroscopy at surfaces will be introduced. As examples, two-photon photoemission (2PPE) and double photoemission (DPE) experiments will be described. In the 2PPE experiments, two times of the photon energy of the incident laser pulses will be absorbed by one single electron, and information from an originally unoccupied electronic state can be retrieved . In the DPE experiments, two electrons are emitted upon the absorption of one single photon . As a result, the distribution of these electron pairs can be fully characterized in the two-dimensional energy spectrum, providing valuable information about the interaction between electrons in solids . Recent developments in our laboratory will be summarized at the end of the talk.  S. Hüfner, Photoelectron Spectroscopy: principles and Applications, Springer (2003), https://doi.org/10.1007/978-3-662-09280-4 .  R. Haight, Surf. Sci. Rep. 21, 275 (1995).  H. Petek and S. Ogawa, Prof. Surf. Sci. 56, 239 (1997).  C.-T. Chiang et al., Phys. Rev. Lett. 103, 077601 (2009).  J. Berakdar, Phys. Rev. B 58, 9808 (1998).  A. Trützschler et al., Phys. Rev. Lett. 118, 136401 (2017).
演講主題：冷原子量子記憶體及量子電腦 Quantum memory and quantum computer based on cold atoms 主講人：中央研究院原分所 研究員 陳應誠博士 演講時間：112年12月11日(一)10:30~12:10 演講地點：志希樓2F 理學院會議室 摘要： Quantum science and technology has become a hot topic in recent years. The goal is to gain quantum advantage in applications like sensing, communication, computing and simulation utilizing the bizarre features of quantum mechanics, such as coherent superposition, quantum entanglement, uncertainty principle …etc. In this talk, I will introduce our efforts in the topic of quantum communication and computing. Specifically, I will first present our advancement on high-performance quantum memory (QM) based on electromagnetically induced transparency in cold atoms. Quantum memory is a device that can store photonic quantum states in stationary atomic media and retrieve on demand. It is a crucial component in long-distance quantum cryptography based on quantum repeater protocol. Our efforts towards high efficiency, high fidelity, and broad bandwidth of QMs will be reported. Finally, I will introduce our new project towards building a quantum processor for quantum computing and simulation based on two-dimensional single-atom arrays. The basic principle and recent progress will be reported. 會議提供餐盒，敬請於12/8前報名https://bit.ly/3uHZRJt
演講主題：半導體綜述：現代科技的基石 從奈米元件到印刷電路板 Semiconductor: The Bedrock of Our Digital World. Subtitle: Manufacturing Overview, from Nano-device to Printed Circuit Board (PCB). 主講人：邱昱哲博士 Inetl工程師 時間：112.11.23 (四) 13:30-15:00 地點：志希樓2F 理學院會議室 摘要： Semiconductors, the fundamental building blocks of modern electronics, have revolutionized the world, enabling an era of unprecedented technological advancements. From the cell phones that enlighten our daily lives to washers that provide us fresh laundry, semiconductors are ubiquitous, shaping our world in profound ways. This presentation delves into the intricate world of semiconductor manufacturing, exploring the journey from the fabrication of nanoscale devices on silicon wafers to the assembly of complex printed circuit boards (PCBs). We'll uncover the intricate processes involved in transforming raw materials into the miniature marvels that drive our digital world. As we conclude, we'll engage in an open discussion about the future vision of semiconductors, exploring how they can address the challenges facing our civilization and propel us towards an even more interconnected and technologically advanced future. 11/20前報名者，會後將提供西式餐盒，報名網址https://bit.ly/49vfzI8
演講主題：RD-BZ Hamiltonian in quantum rings 主講人：陳宗緯副教授 中山大學物理系 摘要： Theoretically, a quantum ring of a circular curve has an internal Zeeman field, which plays an important role in spin transport, which manifests the interplay between the Aharonov-Bohm and Aharonov-Casher topological phases. We proporse a quantum ring Hamiltonian (RD-BZ Hamiltonian) that could be used to experimentally detect the existence of the internal Zeeman field, and thus enable us to change the strength of the internal Zeeman field. Importantly, we show that the RD-BZ Hamiltonian can be constructed from the topological insulator. Similar to the topological insulator, the conductance can exhibit a quasi plateau near the small spin-orbit coupling. Unlike the topological insulator, the increase in the strength of the internal Zeeman field would result in a wider quasi-plateau in conductance, which implies that the ring could remain insulating state (or conducting state) regardless of the small change in the spin-orbit coupling. The thermal average of spin and charge currents are calculated at low temperatures without impurities. We find that the persistent spin current could be nonzero even when the charge current vanishes at nonzero magnetic flux. The result suggests a pure spin current in quantum rings, and its direction can be reversed by changing the magnetic flux. Importantly, the change in the internal Zeeman field would exhibit the plateau-like pure spin current. 日期：112.10.30(一) 時間：10:30-12:30 地點：志希樓2F 理學院會議室 10/27前報名者，會後將提供餐盒
招生名額：9名 (含預估擴充名額) 報名方式、日期(以下各項皆逾時不受理)： 網路取得報名繳費帳號期間：112.10.3(二) 上午 9 時 ~ 112.10.17(二) 中午 12 時 網路登錄報名資料期間：112.10.3(二) 上午 9 時 ~ 112.10.17(二) 下午 3 時 審查資料繳交截止日：【網路上傳】112.10.17(二) 下午 5 時前完成上傳 面試日期：首次全面資料審查，不辦理面試 詳見：本校碩士班甄試招生網頁 本所簡介 │分組必修課│ 計算物理甲組：培養跨領域科學計算人才。必修科目：古典力學、非線性物理、計算物理導論 計算物理乙組：培養計算物理人才，及奠定學生未來繼續在物理相關領域深造的基礎。必修科目：電動力學、量子力學（一）、統計力學 半導體與實驗物理組：結合中研院物理所合聘師資，提供固態物理實驗相關領域訓練。必修科目：電動力學、量子力學（一）、固態物理（一） │畢業學分│ 26學分，可包含選修本校外系或他校（需符合校際選課規定）之研究所課程，但不得超過 7 學分 │學業論文│ 由本所專任教師，或中研院物理所合聘教師指導。本所鼓勵跨領域研究，另提供中研院、本校外系與本所教師共同指導機會 │獎學金│ 本所提供新生獎學金、成績優秀獎學金、教學/研究等多項獎助金 另提供多門應用物理選修課程，如 量子計算、量子力學（二）、固態物理（二）、社會物理、半導體物理導論、奈米科技導論等