Institute of Atomic and molecular Sciences, Academia Sinica

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Dr. Hsiang-Hua Jen

Efficient and high-fidelity entanglement in cavity QED without high cooperativity

Phys. Rev. Lett. 136, 050802 (2026).

The so-called state-carving protocol generates high-fidelity entangled states at an atom-cavity interface without requiring high cavity cooperativity. However, this protocol is limited to 50% efficiency, which restricts its applicability. We propose a simple modification to the state-carving protocol to achieve efficient entanglement generation, with unit probability in principle. Unlike previous two-photon schemes, ours employs only one photon which interacts with the atoms twice - avoiding separate photon detections which causes irrecoverable probability loss. We present a detailed description and performance evaluation of our protocol under non-ideal conditions. High fidelity of 0.999 can be achieved with cavity cooperativity of only 34. Efficient state-carving paves the way for large-scale entanglement generation at cavity-interfaces for modula ...
Dr. Hsiang-Hua Jen

Satellites promise global-scale quantum networks

Optica Quantum 3, 590 (2025).

Academia, governments, and industry around the world are on a quest to build long-distance quantum communication networks for a future quantum internet. Using air and fiber channels, quantum communication quickly faced the daunting challenge of exponential photon loss with distance. Quantum repeaters were invented to solve the loss problem by probabilistically establishing entanglement over short distances and using quantum memories to synchronize the teleportation of such entanglement to long distances. However, due to imperfections and complexities of quantum memories, ground-based proof-of-concept repeater demonstrations have yet been restricted to metropolitan-scale distances. In contrast, direct photon transmission from satellites through empty space faces almost no exponential absorption loss and only quadratic beam divergence loss. A single ...
Dr. Huan-Cheng Chang

Ultrathin Fluorescent Nanodiamond Films for Nanoscale Quantum Sensing in Operando Semiconductor Devices

Adv. Funct. Mater. 36, e13406 (2026).

Nanoscale quantum sensing is playing an increasingly critical role across diverse areas of research, particularly in the rapidly evolving field of semiconductor nanoelectronics. In this work, ultrathin fluorescent nanodiamond (FND) films are developed to function as quantum sensors for in operando measurements of magnetic fields and temperature in semiconductor devices. FNDs are electrically insulating carbon nanomaterials containing nitrogen-vacancy (NV) centers, renowned for their exceptional photostability and distinctive quantum properties. An electrospray deposition method is first established to produce uniform, near-monolayer FND films on bipolar junction transistors (BJTs) and field-effect transistors (FETs) without compromising their performance. Then, optically detected magnetic resonance (ODMR)s is employed to det ...
Dr. Liang-Yan Hsu

Chemistry Meets Plasmon Polaritons and Cavity Photons: A Perspective from Macroscopic Quantum Electrodynamics

J. Phys. Chem. Lett., 16, 1604−1619 (2025).

The interaction between light and molecules under quantum electrodynamics (QED) has long been less emphasized in physical chemistry, as semiclassical theories have dominated due to their relative simplicity. Recent experimental advances in polariton chemistry highlight the need for a theoretical framework that transcends traditional cavity QED and molecular QED models. Macroscopic QED is presented as a unified framework that seamlessly incorporates infinite photonic modes and dielectric environments, enabling applications to systems involving plasmon polaritons and cavity photons. This Perspective demonstrates the applicability of macroscopic QED to chemical phenomena through breakthroughs in molecular fluorescence, resonance energy transfer, and electron transfer. The macroscopic QED framework not only resolves the limitations of classical theorie ...
Dr. Hsiang-Hua Jen

Accelerating multipartite entanglement generation in non-Hermitian superconducting qubits

Quantum Sci. Technol. 10 025021 (2025).

Open quantum systems are susceptible to losses in information, energy, and particles due to their surrounding environment. One novel strategy to mitigate these losses is to transform them into advantages for quantum technologies through tailored non-Hermitian quantum systems. In this work, we theoretically propose a fast generation of multipartite entanglement in non-Hermitian qubits. Our findings reveal that weakly coupled non-Hermitian qubits can accelerate multiparty entanglement generation by thousands of times compared to Hermitian qubits, in particular when approaching the 2^n-th order exceptional points of n qubits in the PT-symmetric regime. Furthermore, we show that Hermitian qubits can generate GHZ states with a high fidelity more than 0.9995 in a timescale comparable to that of non-Hermitian qubits, but at the expense of intense driving ...
Dr. Chia-Lung Hsieh

Point Spread Function Engineering for Spiral Phase Interferometric Scattering Microscopy Enables Robust 3D Single-Particle Tracking and Characterization

ACS Photonics 11(12), 5239–5250 (2024)

Interferometric scattering (iSCAT) microscopy is currently among the most powerful techniques available for achieving high-sensitivity single-particle localization. This capability is realized through homodyne detection, where interference with a reference wave offers the promise of exceptionally precise three-dimensional (3D) localization. However, the practical application of iSCAT to 3D tracking has been hampered by rapid oscillations in the signal-to-noise ratio (SNR) as particles move along the axial direction. In this study, we introduce a novel strategy based on back pupil plane engineering, wherein a spiral phase mask is used to redistribute the phase of the scattered field of the particle uniformly across phase space, thus ensuring consistent SNR as the particle moves throughout the focal volume. Our findings demonstrate that this modified ...
Dr. Ching-Wei Lin

Cytometry in the Short-Wave Infrared

ACS Nano 18, 18534–18547 (2024).

Cytometry plays a crucial role in characterizing cell properties, but its restricted optical window (400-850 nm) limits the number of stained fluorophores that can be detected simultaneously and hampers the study and utilization of short-wave infrared (SWIR; 900-1,700 nm) fluorophores in cells. Here we introduce two SWIR-based methods to address these limitations: SWIR flow cytometry and SWIR image cytometry. We develop a quantification protocol for deducing cellular fluorophore mass. Both systems achieve a limit of detection of ~0.1 fg cell⁻¹ within a 30-min experimental timeframe, using individualized, high-purity (6,5) single-wall carbon nanotubes as a model fluorophore and macrophage-like RAW264.7 as a model cell line. This high-sensitivity feature reveals that low-dose (6,5) serves as an antioxidant, and cell morphology a ...
Dr. Liang-Yan Hsu

Non-Adiabatic Quantum Electrodynamic Effects on Electron–Nucleus–Photon Systems: Single Photonic Mode vs Infinite Photonic Modes [Feature Article]

J. Chem. Phys. 162, 034107 (2025).

The quantum-electrodynamic non-adiabatic emission (QED-NAE) is a type of radiatively assisted vibronic de-excitation due to electromagnetic vacuum fluctuations on non-adiabatic processes. Building on our previous work [Tsai et al., J. Phys. Chem. Lett. 14, 5924 (2023)], we extend the theory of the QED-NAE rate from a single cavity photonic mode to infinite photonic modes and calculate the QED-NAE rates of 9-cyanoanthracene at the first-principles level. To avoid the confusion, the quantum electrodynamic internal conversion process is renamed as “QED-NAE” in our present work. According to our theory, we identify three key factors influencing the QED-NAE processes: light–matter coupling strength (mode volume), mass-weighted orientation factor, and photonic density of states. The mode volume is the primary factor causing rate differe ...
Dr. Yu-Ju Lin

Vortex Nucleations in Spinor Bose Condensates under Localized Synthetic Magnetic Fields

Phys. Rev. Lett. 135, 093401 (2025).

Gauge fields are ubiquitous in modern quantum physics. In superfluids, quantized vortices can be induced by gauge fields. Here we demonstrate the first experimental observation of vortex nucleations in light-dressed spinor Bose-Einstein condensates under radially-localized synthetic magnetic fields. The light-induced spin-orbital-angular-momentum coupling creates azimuthal gauge potentials $\vec{A}$ for the lowest-energy spinor branch dressed eigenstate. The observation of the atomic wave function in the lowest-energy dressed eigenstate reveals that vortices nucleate from the cloud center of a vortex-free state with canonical momentum $\vec{p} = 0$. This is because a large circulating azimuthal velocity field ~$\vec{p}-\vec{A}$ at the condensate center results in a dynamically unstable localized excitation that initiates vortex nucleations. Our obs ...

News

2026-03-10

Congratulations to the following Poster Award winners of the 2026 Chemistry National Meeting.

2026-03-05

CECAM-TW Node Event：Recent trends in computer simulation in Physics, Chemistry and Biology

2026-02-09

Call for Applications for IAMS Junior Fellowships (Deadline: February 28, 2026)

2026-01-20

Congratulations to following Award winners of the 2026 Annual Meeting of the Physical Society of Taiwan. The meeting was held on January 13-15, 2026 in Chia-Yi, Taiwan

2026-01-19

Congratulations to Dr. Charles Lai on receiving the Leap Fellowship from Foundation for the Advancement of Outstanding Scholarship.

2026-01-05

Congratulations to the following MST students on receiving the 2026 AS-TIGP Research Performance Fellowship.

2025-12-19

Congratulations to Dr. Klichchupong Dabsamut (Dr. Ching-Ming Wei's Group) on receiving Regular Postdoctoral Scholar (2026 1st Session Academia Sinica Postdoctoral Research Scholars).

2025-11-24

Congratulations to winners of the 2025 IAMS Annual Award for Outstanding Publication by a Junior Researcher.

2025-11-24

Congratulations to Mr. Yi-Ting Chuang (Dr. Liang-Yan Hsu's Group) on receiving National Taiwan University Presidential Award for Graduate Students for the 113th Academic Year.

Seminar

May
18
2026

Enzymatic Glycosylation for the Synthesis of Human Milk Oligosaccharides and Gangliosides

Prof. Chun-Cheng Lin, Department of Chemistry, National Tsing Hua University

2026-05-18 PM 02:00 Dr. Poe Lecture Hall, IAMS

May
21
2026

Probing Tunable Exciton States and Dynamics in WS2/WSe2 Moiré Heterobilayers

Prof. Hsu, Wei-Ting , Department of Physics, National Tsing Hua University

2026-05-21 PM 03:30 C. T. Chang Memorial Hall, IAMS

May
28
2026

Design and In-Situ Characterization of Two-Dimensional Materials for Electrochemical Applications

Chair I-Wen Peter Chen , Department of Chemistry, National Cheng-Kung University

2026-05-28 PM 03:30 Dr. Poe Lecture Hall, IAMS

Jun
01
2026

Multimodal Metabolic Nanoscopy for Imaging Metabolism at Subcellular Resolution

Dr. Lingyan Shi , Shu Chien-Gene Lay Department of Bioengineering, UCSD, US

2026-06-01 PM 02:00 C. T. Chang Memorial Hall, IAMS

Jun
04
2026

Measuring the effective mass and Fermi velocity of charges by an electron microscopy

Director Ming-Wen Chu , Center for Condensed Matter Sciences, NTU

2026-06-04 PM 03:30 Dr. Poe Lecture Hall, IAMS

Conferences

【CECAM-TW Workshop】Plasmonics Across Scales: From Fundamentals to Applications (May 20-21, 2026)

Link

Dr. Poe Lecture Hall, IAMS
2026-05-20 09:00 AM ~ 2026-05-21 12:00 PM

Workshop Overview
Topic: Plasmonics Across Scales: From Fundamentals to Applications
Date: May 20, 2026 – May 21, 2026
Venue: Dr. Poe Lecture Hall, IAMS, Academia Sinica (CECAM-TW)

Key Highlights
This workshop gathers experts to explore the latest advancements in plasmonics, covering the spectrum from theoretical foundations to innovative practical applications. It is an excellent platform for networking and academic exchange.

Organizers:
Hsing-Ta (Theta) Chen (University of Notre Dame)
Liang-Yan Hsu (Academia Sinica)

Registration Information
Conference Website: Plasmonics Across Scales Workshop
Registration: Registration Form
Registration Fee: Free
Deadline: May 17, 2026

Contact Person:
Ms. Jess Wu (jesswu@g.iams.sinica.edu.tw)

【DAMOP Taiwan Night 2026】

Link

Dr. Poe Lecture Hall, IAMS
2026-06-02 06:00 PM ~ 08:30 PM

2026 DAMOP 台灣之夜學術餐會

【2026 DAMOP 台灣之夜學術餐會】

美國物理學會（APS）DAMOP 年會為全球 AMO 與量子科技領域的重要國際盛會。今年會議將於美國羅德州島舉行，匯聚世界頂尖學者、博士後研究員與學生，共同交流量子資訊、量子工程與 AMO 物理的最新研究成果。

為延續 DAMOP 會議中的學術交流與合作，本所將舉辦「DAMOP 台灣之夜學術餐會」，誠摯邀請在台與全球學者、博士後研究員及學生參與交流。

【DAMOP Taiwan Night 2026】

The APS DAMOP Meeting is one of the premier international conferences in AMO physics and quantum science. This year’s meeting in Rhode Island will gather leading researchers, postdoctoral scholars, and students worldwide to share the latest advances in quantum information, quantum engineering, and AMO physics.

To foster continued academic exchange and collaboration, we warmly invite researchers, postdocs, and students in Taiwan and around the world to join the DAMOP Taiwan Night Academic Dinner.

活動資訊 | Event Information

日期 / Date：2026 年 6 月 2 日 / June 2, 2026
時間 / Time：18:00–20:30
地點 / Venue：Rhode Island Convention Center, Room 557

The 16th Asian International Seminar on Atomic and Molecular Physics (AISAMP16)

Link

Dr. Poe Lecture Hall, IAMS
2026-10-26 01:00 PM ~ 2026-10-30 05:00 PM

The 16th Asian International Seminar on Atomic and Molecular Physics

The 16th AISAMP will be held at the Institute of Atomic and Molecular Sciences, Academia Sinica from October 26 (Mon.) to October 30 (Fri.), 2026, on the lively and scenic campus of National Taiwan University, Taipei, Taiwan.

The local organizing committee consists of members from Academia Sinica and National Tsing Hua University in the fields of Physics, Chemistry and Material Science.

Conference details are available on the AISAMP16 website:
https://sites.google.com/g.iams.sinica.edu.tw/aisamp16/

Academia Sinica Program

i-MATE Program

TIGP

Molecular Science and Technology Program

Nano Science and Technology Program

IAMS International Internship Program

Now at： Front Page

Copyright©2012 Institute of Atomic and Molecular Sciences, Academia Sinica | Mobile Version
Address: No. 1, Roosevelt Rd., Sec. 4, Taipei, 106319, Taiwan
P.O. Box 23-166 Taipei National Taiwan University, Taipei City, 106923, Taiwan
Tel: 886-2-2362-0212 Fax:886-2-2362-0200 E-mail: iamspublic@gate.sinica.edu.tw
Latest update 2026-05-15 19:41:27

Institute of Atomic and Molecular Sciences Academia Sinica

Highlights

News

Seminar

Conferences

2026 DAMOP 台灣之夜學術餐會

【2026 DAMOP 台灣之夜學術餐會】

【DAMOP Taiwan Night 2026】

活動資訊 | Event Information

The 16th Asian International Seminar on Atomic and Molecular Physics