Results 111 to 120 of about 146,281 (291)

Giant Magnetocaloric Effect in a Honeycomb Spiral Spin‐Liquid Candidate

Advanced Science, EarlyView.
The frustrated honeycomb‐lattice single‐crystal GdZnPO, a spiral spin‐liquid (SSL) candidate, exhibits a giant magnetocaloric effect (with a large Grüneisen parameter Γm = 4.4 T−1) and exceptional cooling performance near the crossover magnetic field (Hc), surpassing other known magnetocaloric materials.
Yuqian Zhao, Xun Chen, Zongtang Wan, Zhaohua Ma, Yuesheng Li   +4 more
wiley   +1 more source

Unambiguous Quantum State Discrimination in a PT$\mathcal {PT}$‐Symmetric System of a Single Trapped Ion

Advanced Science, EarlyView.
An unambiguous quantum state discrimination for two nonorthogonal states is demonstrated using a single ion. By implementing a non‐Hermitian Hamiltonian with parity‐time‐reversal (PT) symmetry, two candidate states evolve with different speed and become orthogonal at specific time, hence can be discriminated unambiguously. Experiments are performed for
Chenhao Zhu, Tingting Shi, Liangyu Ding, Zhiyue Zheng, Xiang Zhang, Wei Zhang   +5 more
wiley   +1 more source

Optimal Control of Engine Warmup in Hybrid Vehicles

Oil & Gas Science and Technology, 2016
An Internal Combustion Engine (ICE) under cold conditions experiences increased friction losses due to a high viscosity of the lubricant. With the additional control freedom present in hybrid electric vehicles, the losses during warmup can be minimized ...
van Reeven Vital, Hofman Theo, Willems Frank, Huisman Rudolf, Steinbuch Maarten   +4 more
doaj   +1 more source

H∞Excitation Control Design for Stochastic Power Systems with Input Delay Based on Nonlinear Hamiltonian System Theory [PDF]

, 2015
Weiwei Sun, Lianghong Peng, Ying Zhang, Huaidan Jia   +3 more
openalex   +1 more source

Polymorphism Crystal Structure Prediction with Adaptive Space Group Diversity Control

Advanced Science, EarlyView.
Polymorphic materials exhibit diverse properties despite identical compositions, but predicting their crystal structures remains challenging. This study introduces ParetoCSP2, a multi‐objective genetic algorithm incorporating genotypic age, energy, and space group diversity.
Sadman Sadeed Omee, Lai Wei, Sourin Dey, Jianjun Hu   +3 more
wiley   +1 more source

Millikelvin Intracellular Nanothermometry with Nanodiamonds

Advanced Science, EarlyView.
Nanothermometry in living cells is crucial for understanding heat diffusion and advancing cellular biology and drug discovery. Previous studies have reported controversial intracellular temperature variations. Using nanodiamond nanothermometry in macrophages, it is found that, in such experimental setting, apparent temperature changes are actually due ...
Maabur Sow, Jacky Mohnani, Genko Genov, Raphael Klevesath, Elisabeth Mayerhoefer, Yuliya Mindarava, Rémi Blinder, Soumen Mandal, Fabien Clivaz, Raúl B. Gonzalez, Daniel Tews, Christian Laube, Wolfgang Knolle, Amelie Jerlitschka, Farid Mahfoud, Oleg Rezinkin, Mateja Prslja, Yingke Wu, Pamela Fischer‐Posovszky, Martin B. Plenio, Susana F. Huelga, Tanja Weil, Anke Krueger, Gavin W. Morley, Oliver A. Williams, Steffen Stenger, Fedor Jelezko   +26 more
wiley   +1 more source

Time-dependent Gutzwiller simulation of Floquet topological superconductivity

Communications Physics
Periodically driven systems provide a novel route to control the topology of quantum materials. In particular, Floquet theory allows an effective band description of periodically-driven systems through the Floquet Hamiltonian.
Takahiro Anan, Takahiro Morimoto, Sota Kitamura   +2 more
doaj   +1 more source

Two Types of Non‐Abelian Topological Phase Transitions Under Duality Mapping in 1D Photonic Chains

Advanced Science, EarlyView.
In this work, two types of non‐Abelian phase transitions are revealed. The first type is the braided‐node type, signified by the Dirac degeneracy node moving into or out of the unit circle. The second type corresponds to the emerging of nodal‐line degeneracy which intersects with unit circles.
Yufu Liu, Yunlin Li, Jingguang Chen, Xianjun Wang, Haoran Zhang, Fang Guan, Xunya Jiang   +6 more
wiley   +1 more source

Self‐Assembled Monolayers Facilitate Simultaneous Enhancements of External Quantum Efficiencies and Circularly Polarized Luminescence Dissymmetry Factors for Chiral Perovskite Red Spin‐Light Emitting Diodes

Advanced Science, EarlyView.
With the self‐assembled monolayer (SAM), external quantum efficiencies and dissymmetry factors for circularly polarized electroluminescence are simultaneously enhanced for chiral perovskite red spin‐light emitting diodes (spin‐LEDs). These are ascribed to the improvements of magneto‐chiroptical and electronic properties.
Linze Jiang, Guoshuai Zhang, Houzhi Chen, Xiangpeng Zhang, Chao Qian, Jing Li, Lidan Guo, Jinpeng Li, Shuaishuai Ding, Guankui Long, Chuang Zhang, Zhixiang Wei, Xiangnan Sun, Kai Wang   +13 more
wiley   +1 more source

Relational Observables in Gravity: a Review

Symmetry, Integrability and Geometry: Methods and Applications, 2012
We present an overview on relational observables in gravity mainly from a loop quantum gravity perspective. The gauge group of general relativity is the diffeomorphism group of the underlying manifold.
Johannes Tambornino
doaj   +1 more source