Results 71 to 80 of about 1,078,579 (226)
Advanced Science, EarlyView.Ti substitution stabilizes Co‐free high‐Ni layered oxides through both structural and electronic effects. TiO6 octahedra act as compensatory structural units that help interrupt cooperative Jahn–Teller distortion and suppress detrimental phase transitions, while the electron‐withdrawing inductive effect of Ti stabilizes the oxygen lattice. As a result,
Bixian Ying +19 more
wiley +1 more source
Quantum Error Correction for Metrology [PDF]
Physical Review Letters, 2014 We propose and analyze a new approach based on quantum error correction (QEC) to improve quantum metrology in the presence of noise. We identify the conditions under which QEC allows one to improve the signal-to-noise ratio in quantum-limited measurements, and we demonstrate that it enables, in certain situations, Heisenberg-limited sensitivity.
Kessler, Eric +3 more
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Stability optimization based on high-resolution spatial thermal distribution of a single 174Yb+ ion
Shenzhen Daxue xuebao. Ligong banTrapped 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 +5 more
doaj +1 more source
Advances in Se Wide‐Bandgap Photovoltaics and TexSe1‐x SWIR Photodiodes
Advanced Science, EarlyView.In this review, fundamental properties and current challenges in Se photovoltaics (PVs) for tandem and indoor PVs and TexSe1‐x alloys for short wave infrared photodiodes are discussed. A case is made for the practicality of elemental chalcogenide optoelectronics, and a pathway toward resolving the key challenges in these respective technologies is ...
Adam D. Alfieri, Deep Jariwala
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Combining Critical and Quantum Metrology
Physical Review Letters6 pages, 3 ...
Christoph Hotter +2 more
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Precision-guaranteed quantum metrology [PDF]
Physical Review A, 2015 Quantum metrology is a general term for methods to precisely estimate the value of an unknown parameter by actively using quantum resources. In particular, some classes of entangled states can be used to significantly suppress the estimation error. Here, we derive a formula for rigorously evaluating an upper bound for the estimation error in a general ...
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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 +3 more
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From Sensing Mechanisms to System Co‐Design: Graphene‐Based Sensors and Readout Circuits
Advanced Science, EarlyView.This review establishes a unified PS–EQ–RF framework linking graphene sensing mechanisms, native electrical outputs, and output‐specific readout circuits. Voltage‐, current‐, resistance‐, and capacitance‐type sensing systems are systematically classified to guide architecture selection, low‐noise design, system co‐design, and practical integration ...
Jinduo Zhang +5 more
wiley +1 more source
Approaching the critical point through an exact ground-state evolution
Physical Review ResearchWe 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 +4 more
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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. +6 more
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