Results 71 to 80 of about 9,545 (228)

Seedless One‐Pot Synthesis of Colloidal InAs Quantum Dots Enabling a High‐Accuracy Photoplethysmography Oximeter

Advanced Science, EarlyView.
A real‐time, non‐contact photoplethysmography (PPG) system based on InAs colloidal quantum dots (CQDs) synthesized via a seedless injection synthesis is demonstrated. The measured oxygen saturation shows considerable agreement with commercial PPG devices.
Beom Kwan Kim, Seungin Jee, Yongnam Ahn, In‐Suh Lee, Dongeon Kim, Seongchong Park, Yujin Jung, In‐Ho Bae, Se‐Woong Baek   +8 more
wiley   +1 more source

Quantum metrology with cold atomic ensembles

EPJ Web of Conferences, 2013
Quantum metrology uses quantum features such as entanglement and squeezing to improve the sensitivity of quantum-limited measurements. Long established as a valuable technique in optical measurements such as gravitational-wave detection, quantum ...
Mitchell Morgan W., Sewell R. J., Napolitano M., Koschorreck M., Dubost B., Behbood N., Kubasik M.   +6 more
doaj   +1 more source

Bayesian quantum parameter estimation with Gaussian states and homodyne measurements in a dissipative environment

Results in Physics, 2023
The deterioration of precision caused by quantum decoherence in dissipative environments is a longstanding problem in the development of quantum metrology.
Jie Tang, HuiCun Yu, Ying Liu, ZhiFeng Deng, JiaHao Li, YueXiang Cao, JiaHua Wei, Lei Shi   +7 more
doaj   +1 more source

Electrostatic Potential Complementarity for Thickness‐Tolerant Cathode Interlayers in High‐Efficiency Organic and Tandem Solar Cells

Advanced Science, EarlyView.
Two model molecules — trimesic acid (TMA) and phloroglucinol (PG) — with opposite central electrostatic potential (ESP) distributions are employed to elucidate how molecular electrostatic interactions regulate the cathode interlayer (CIL) PDINN. Electrostatic potential complementarity is revealed as the intrinsic origin of thickness sensitivity in CILs,
Xiaoman Ding, Dana Mukasheva, Jiaxu Che, Guangye Zhang, Xiuze Hei, Haoran Lin, Jie Lv, Patrick Fong, Zhiwei Ren, Annie Ng, Mingjian Yuan, Hongyu Zhang, Gang Li, Hanlin Hu   +13 more
wiley   +1 more source

Quantum metrology with imperfect states and detectors

, 2010
Quantum enhancements of precision in metrology can be compromised by system imperfections. These may be mitigated by appropriate optimization of the input state to render it robust, at the expense of making the state difficult to prepare.
Datta, Animesh, Walmsley, IA, Smith, BJ, Dorner, U, Datta, A, Smith, B.J., Walmsley, I.A., Datta, A., Thomas-Peter, Nicholas, Animesh Datta, Ian A. Walmsley, Lijian Zhang, Nicholas Thomas-Peter, Walmsley, Ian, Thomas-Peter, N, Smith, Brian, Zhang, Lijian, Dorner, U., Zhang, L., Zhang, L, Uwe Dorner, Brian J. Smith, Thomas-Peter, N.   +22 more
core   +1 more source

Multiferroic‐Centric Materials and Systems Engineering for Battery Applications: An Insight Into Mechanisms, Strategies, and Characterizations

Advanced Science, EarlyView.
Multiferroic order parameters – polarization, magnetization, and ferroelastic strain – are positioned as dynamic design variables for batteries. Their mechanistic roles, practical tuning through fabrication and external fields, and ferroic‐resolved characterization routes are unified into a closed‐loop framework, revealing how coupled ferroic responses
Jiaqi Su, Yanda Zhu, Hao Peng, Manman Li, Xuzihan Zhang, Meixiao Wu, Siyuan Zhang, Yuhan Zeng, Jiwen Liao, Ming Luo, Hetaishan Huang, Yutong Wang, Sean Li, Wenxian Li   +13 more
wiley   +1 more source

Dynamic Evolution‐Controlled Parabolic‐Shaped Microstructures for Ultra‐Black Surface via Self‐Assembled Microsphere Mask Etching

Advanced Science, EarlyView.
A robust, substrate‐independent fabrication approach overcomes the spectral and geometric limitations of traditional stray‐light suppression. By combining ink spray‐coating with self‐assembled microsphere mask etching, this method produces parabolic‐shaped microstructures on diverse planar and curved engineering components.
Yiming Li, Jianwei Wang, Guoxu Yu, Qunbo Lv, Yuan Ma, Jiadao Wang   +5 more
wiley   +1 more source

Approaching the critical point through an exact ground-state evolution

Physical Review Research
We investigate critical quantum metrology in a system where a qubit is dispersively coupled to a parametrically driven bosonic field. By engineering a counterdiabatic driving Hamiltonian under realistic physical constraints, we demonstrate a high ...
Jun-Hao Lin, Ke-Xiong Yan, Jie Song, Ye-Hong Chen, Yan Xia   +4 more
doaj   +1 more source

Stability optimization based on high-resolution spatial thermal distribution of a single 174Yb+ ion

Shenzhen Daxue xuebao. Ligong ban
Trapped ion systems play a vital role in fields such as quantum information processing and optical frequency standards. Low-energy, highly stable trapped ions enable precise quantum manipulation and significantly reduce Doppler effect.
NIU Haipo, ZHENG Pengcheng, HUANG Qiyin, HUANG Zerui, ZHANG Songqian, LIU Peiliang   +5 more
doaj   +1 more source

Coherence enhanced quantum metrology in a nonequilibrium optical molecule

New Journal of Physics, 2018
We explore the quantum metrology in an optical molecular system coupled to two environments with different temperatures, using a quantum master equation beyond secular approximation.
Zhihai Wang, Wei Wu, Guodong Cui, Jin Wang   +3 more
doaj   +1 more source