Research Highlights
Dr. Hsiang-Hua Jen, Dr. Ying-Cheng Chen
(2024)
C.-H. Chien, S. Goswami, C.-C. Wu, W.-S. Hiew, Y.-C. Chen, and H. H. Jen
Quantum Sci. Tech. 9, 025020 (2024).
Scalable graph states are essential for measurement-based quantum computation and many entanglement-assisted applications in quantum technologies. Generation of these multipartite entangled states requires a controllable and efficient quantum device with delicate design of generation protocol. Here we propose to prepare high-fidelity and scalable graph states in one and two dimensions, which can be tailored in an atom-nanophotonic cavity via state carving technique. We propose a systematic protocol to carve out unwanted state components, which facilitates scalable graph states generations via adiabatic transport of a definite number of atoms in optical tweezers. An analysis of state fidelity is also presented, and the state preparation probability can be optimized via multiqubit state carvings and sequential single-photon probes. Our results showcase the capability of an atom-nanophotonic interface for creating graph states and pave the way toward novel problem-specific applications using scalable high-dimensional graph states with stationary qubits.
Dr. Huan-Cheng Chang
(2023)
Teng-I Yang,1 Yuen Yung Hui,1 Jen-Iu Lo,2 Yu-Wen Huang,1 Yin-Yu Lee,3 Bing-Ming Cheng,2,4,* and Huan-Cheng Chang1,5,6,*
1Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei City 106319, Taiwan
2Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien City 970, Taiwan
3National Synchrotron Radiation Research Center, Hsinchu City 300092, Taiwan
4Tzu-Chi University of Science and Technology, Hualien City 970, Taiwan
5Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei City 106335, Taiwan
6Department of Chemistry, National Taiwan Normal University, Taipei City 106, Taiwan
Nano Lett. 23, 9811–9816 (2023).
Extreme ultraviolet (EUV) radiation with wavelengths of 10 – 121 nm has drawn considerable attention recently for its use in photolithography to fabricate nanoelectronic chips. This study demonstrates, for the first time, fluorescent nanodiamonds (FNDs) with nitrogen-vacancy (NV) centers as scintillators to image and characterize EUV radiations. The FNDs employed are ~100 nm in size; they form a uniform and stable thin film on an indium tin oxide-coated slide by electrospray deposition. The film is non-hygroscopic, photostable, and can emit bright red fluorescence from NV0 centers when excited by EUV light. An FND-based imaging device has been developed and applied for beam diagnostics of 50 nm and 13.5 nm synchrotron radiations, achieving a spatial resolution of 30 μm using a film of ~1 μm thickness. The noise equivalent power density is 29 μW/cm2Hz1/2 for the 13.5 nm radiation. The method is generally applicable to imaging EUV radiations from different sources.
Pei-Ling Luo*, I-Yun Chen, M. Anwar H. Khan, and Dudley E. Shallcross
Communications Chemistry, 6, 130 (2023)
Ozonolysis of isoprene is considered to be an important source of formic acid (HCOOH), but its underlying reaction mechanisms related to HCOOH formation are poorly understood. Here, we report the kinetic and product studies of the reaction between the simplest Criegee intermediate (CH2OO) and formaldehyde (HCHO), both of which are the primary products formed in ozonolysis of isoprene. By utilizing time-resolved infrared laser spectrometry with the multifunctional dual-comb spectrometers, the rate coefficient kCH2OO+HCHO is determined to be (4.11 ± 0.25) × 10−12 cm3 molecule−1 s−1 at 296 K and a negative temperature dependence of the rate coefficient is observed and described by an Arrhenius expression with an activation energy of (–1.81 ± 0.04) kcal mol−1. Moreover, the branching ratios of the reaction products HCOOH + HCHO and CO + H2O + HCHO are explored. The yield of HCOOH is obtained to be 37–54% over the pressure (15–60 Torr) and temperature (283–313 K) ranges. The atmospheric implications of the reaction CH2OO + HCHO are also evaluated by incorporating these results into a global chemistry-transport model. In the upper troposphere, the percent loss of CH2OO by HCHO is found by up to 6% which can subsequently increase HCOOH mixing ratios by up to 2% during December-January-February months.
Hung-Sheng Tsai, Chih-En Shen, Sheng-Chieh Hsu, and Liang-Yan Hsu*
J. Phys. Chem. Lett. 14, 25, 5924–5931 (2023).
To explore non-adiabatic effects caused by electromagnetic (EM) vacuum fluctuations in molecules, we develop a general theory of internal conversion (IC) in the framework of quantum electrodynamics and propose a new mechanism, “quantum electrodynamic internal conversion” (QED-IC). The theory allows us to compute the rates of the conventional IC and QED-IC processes at the first-principles level. Our simulations manifest that, under experimentally feasible weak light–matter coupling conditions, EM vacuum fluctuations can significantly affect IC rates by an order of magnitude. Moreover, our theory elucidates three key factors in the QED-IC mechanism: the effective mode volume, coupling-weighted normal mode alignment, and molecular rigidity. The theory successfully captures the nucleus–photon interaction in the factor “coupling-weighted normal mode alignment”. In addition, we find that molecular rigidity plays a totally different role in conventional IC versus QED-IC rates. Our study provides applicable design principles for exploiting QED effects on IC processes.
Dr. Charles Pin-Kuang Lai
(2023)
Bryan John Abel Magoling,
Anthony Yan-Tang Wu,
Yen-Ju Chen,
Wendy Wan-Ting Wong,
Steven Ting-Yu Chuo,
Hsi-Chien Huang,
Yun-Chieh Sung,
Hsin Tzu Hsieh,
Poya Huang,
Kang-Zhang Lee,
Kuan-Wei Huang,
Ruey-Hwa Chen,
Yunching Chen,
Charles Pin-Kuang Lai
Advanced Materials. https://doi.org/10.1002/adma.202208966 (2023).
Our latest publication employed PalmGRET, a bioluminescence-resonance-energy-transfer (BRET)-based EV reporter, to discover an abundant release of big EVs (bEVs; >200 nm) by aggressive breast cancers when compared to epithelial and less malignant cells. bEVs have been largely overshadowed by small EVs (sEVs; <200 nm) in EV research in the past decades. This is the first study to accurately detect and systematically compare biophysical property and in vivo profiles of breast cancer bEVs and sEVs. This is followed by the identification of EV surface oncoproteins, and their role in modulating organotropism and tumorigenic potential of the bEVs and sEVs. Our landmark findings impart a broad and deep reference for upcoming EV studies, with an emphasis on EV engineering for diagnosis and therapeutic applications.