quantum
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Physics
Quantum breakthrough could lead to sustainable chiral spintronics
Rendering of the tilt of the relativistic Dirac cone in the bulk electronic band of a quasi-two-dimensional (2D) magnetic topological metalloid. This is achieved by hydrogen insertion, which generates a tunable low-dissipative chiral charge current. Credit: Krusin Institute A team of physicists led by Lia Krusin Erlbaum of the City University of New York has used hydrogen cations (H+) to…
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Physics
Secret laboratory developing Britain’s first quantum clock
A strontium atomic clock photographed in a laboratory at the University of Colorado Boulder in the United States. Britain’s top-secret laboratory is developing the country’s first quantum clock to help strengthen British military intelligence and reconnaissance, the Ministry of Defense announced on Thursday. The clock is highly accurate, with an error of less than a second over billions of years,…
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Physics
Advances in unidirectional heat flow: the next era of quantum thermal diodes
Quantum thermal diode model based on qubit and qutrit. Due to its asymmetric design, this system behaves as a thermal diode when connected between two thermal buses. Credit: APL Quantum (2024). DOI: 10.1063/5.0237842 Thermal management at the nanoscale has long been the basis for advanced technological applications, from high-performance electronics to quantum computing. To address this important challenge, we have…
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Nanotechnology
High-quality nanodiamonds offer new possibilities for bioimaging and quantum sensing
Researchers have developed nanodiamonds (NDs) with nitrogen vacancy (NV) centers that exhibit superior spin properties and fluorescence compared to commercially available NDs. These NDs exhibit longer spin relaxation times and require less microwave power for spin detection, making them ideal for quantum sensing of biological samples. Provided by: Masazumi Fujiwara, Okayama University Quantum sensing is a rapidly developing field that…
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Physics
Physicists measure quantum geometry for the first time
Strategies for measuring quantum geometric properties in condensed matter. Credit: Nature Physics (2024). DOI: 10.1038/s41567-024-02678-8 For the first time, MIT physicists have measured the geometry, or shape, of electrons in a solid at the quantum level. Scientists have long known how to measure the energy and velocity of electrons in crystalline materials, but until now the quantum geometry of those…
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Physics
Scientists observe ‘negative time’ in quantum experiments
Experimental physicist Daniela Angulo poses with a device in her physics lab at the University of Toronto. Scientists have long known that light can sometimes appear to leave a material before it enters it, but this effect can be interpreted as an illusion caused by how waves are distorted by the material. It has been ignored. Now, through innovative quantum…
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Science
Researchers make ‘significant progress’ in quantum simulations of molecular electron transport
Front row, left to right: Peter Wallins, Guido Pagano, Jose Onucic. Back row, left to right: Roman Jurabel, Midodna Duraisamy Suganti, Vithal So. Credit: Alex Becker/Rice University Rice University researchers have made significant progress in simulating molecular electron transport, a fundamental process that underpins countless physical, chemical, and biological processes. The study, published in Science Advances, uses a trapped ion…
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Physics
Infrared quantum ghost imaging illuminates living plants but doesn’t disturb them
Experimental setup and photon pair correlation. Credit: Optica (2024). DOI: 10.1364/OPTICA.527982 The study, published in the journal Optica, demonstrates live plant imaging of several representative plant samples, including the biofuel crop sorghum. Using a new detector, researchers obtained clear images of living sorghum plants in light much dimmer than starlight. This advancement enables imaging of delicate and light-sensitive samples such…
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Physics
Bringing the power of tabletop precision lasers for quantum science to the chip scale
Andrei Ishchenko holds an ultra-high-quality ring resonator (left) that helps turn “coarse” light from a commercially available Fabry-Perot laser diode (right) into a low-linewidth laser. Credit: Sonia Fernandez, University of California, Santa Barbara For experiments that require ultra-high precision measurements and control of atoms (think two-photon atomic clocks, cold atom interferometer sensors, quantum gates), more spectrally pure (emitting a single…
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Nanotechnology
Discovery of eddy electric fields could impact quantum computing
Quasicrystals with a 30 degree twist of the MoS2 bilayer and the atomic scheme of the twisted bilayer MoS2 enabled the generation of electric vortex fields and the creation of 2D quasicrystals. Credit: City University of Hong Kong A new eddy electric field that has the potential to power future electronic, magnetic and optical devices has been observed by researchers…
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