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IMAGE: (a-b) Multimode interaction in a single optomechanical resonator creates an extensible synthetic gauge field; (c-e) Responses of optical photons and phonons in the cavity under different synthetic magnetic field intensities.. view more
Credit: CHEN Yuan et al.
The research team led by Prof. GUO Guangcan and Dr. DONG Chunhua from the University of Science and Technology of China realized synthetic gauge fields in a single optomechanical resonator by controlling geometric phase with the multimode interaction in the micro-resonator.
By engineering a Hamiltonian, uncharged particles or bosonic excitations can acquire a path-dependent phase which realizes a synthetic magnetic field. Such synthetic gauge field can improve the precision of quantum many-body simulation and control over bosons.
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IMAGE: SEM micrograph of vertically standing, flat micromirror array with an inset of magnified area. Credit: Hillmer et al. view more
Credit: Hillmer et al.
Buildings are responsible for 40 percent of primary energy consumption and 36 percent of total CO2 emissions. And, as we know, CO2 emissions trigger global warming, sea level rise, and profound changes in ocean ecosystems. Substituting the inefficient glazing areas of buildings with energy efficient smart glazing windows has great potential to decrease energy consumption for lighting and temperature control.
Harmut Hillmer et al. of the University of Kassel in Germany demonstrate that potential in MOEMS micromirror arrays in smart windows for daylight steering, a paper published recently in the inaugural issue of the
Osaka University researchers have developed 3D porous nanocarbon materials through the pyrolysis of chitin nanofiber papers derived from crab shells. The properties of the pyrolyzed chitin nanofiber papers could be controlled using the pyrolysis temperature, and the materials were successfully used as photosensors, as well as supercapacitor electrodes for energy storage. It is hoped that the high performance achieved using the renewable raw material will highlight the viability of sustainable electronics.
Dr. SHEN Laiquan, Prof. BAI Haiyang, Prof. SUN Baoan, and others from Prof. WANG Weihua s group at the Institute of Physics of the Chinese Academy of Sciences (CAS) have successfully observed the effect of cavitation on fracture behavior in glasses. They revealed that crack propagation is dominated by the self-organized nucleation, growth, and coalescence of nanocavities in metallic glasses.