Phys.org June 17, 2022 An international team of researchers (USA – UC Berkeley, University of Nebraska, Argonne National Laboratory, Canada) has found a way to combine the advantages of light and matter at room temperature suitable for finding the global minimum of mathematical formulations at room temperature. They used solution-grown halide perovskite grown under nanoconfinement. This produced exceptional smooth single-crystalline large crystals with great optical homogeneity. Its material properties could enable future studies at room temperature rather than ultracold temperatures. They showed that XY spin lattice with many coherently coupled condensates that can be constructed as a lattice with a […]
Tag Archives: Quantum materials
Developing the next generation of quantum algorithms and materials
Phys.org June 6, 2022 In its current stage of development, quantum computing is still very sensitive to noise and disruptive factors in the environment. To overcome these limitations a team of researchers in the US (Pacific Northwest National Laboratory (PNNL), Oak Ridge National Laboratory, Microsoft, MIT, MIT Lincoln Laboratory, Washington University) is developing simulations that provide a glimpse into how quantum computers work. They combined two different types of simulations to create the Northwest Quantum Simulator (NWQ-Sim) to test quantum algorithms. It can help us look beyond the limitations of the existing devices and test algorithms for more sophisticated systems. […]
Key witness helps scientists detect ‘spooky’ quantum entanglement in solid materials
Phys.org November 8, 2021 The lack of methods to experimentally detect and quantify entanglement in quantum matter impedes our ability to identify materials hosting highly entangled phases, such as quantum spin liquids. An international team of researchers (USA – Oak Ridge National Laboratory, Drew School, Germany, UK, France, Poland) tested three entanglement witnesses using a combination of neutron scattering experiments and computational simulations. Entanglement witnesses are techniques that act as data analysis tools to determine which spins cross the threshold between the classical and quantum realms. To ensure that the witnesses could be trusted, the team applied all three of them […]
Quantum material to boost terahertz frequencies
Science Daily October 20, 2021 An international team of researchers (Germany, Spain, Russia) investigated the ultrafast carrier dynamics in topological insulators (TIs) of the bismuth and antimony chalcogenide family, where they isolated the response of Dirac fermions at the surface from the response of bulk carriers by combining photoexcitation with below-bandgap terahertz (THz) photons and TI samples with varying Fermi level, including one sample with the Fermi level located within the bandgap. They identified distinctly faster relaxation of charge carriers in the topologically protected Dirac surface states, compared to bulk carriers and they observed THz harmonic generation without any saturation […]
Quantum materials cloak thermal radiation
Nanowerk August 11, 2021 For most solids, the thermally emitted power increases monotonically with temperature in a one-to-one relationship that enables applications such as infrared imaging and noncontact thermometry. A team of researchers in the US (University of Wisconsin–Madison, Harvard University, Purdue University, Brookhaven National Laboratory) has demonstrated that ultrathin thermal emitters that violate this one-to-one relationship via the use of samarium nickel oxide (SmNiO3), a strongly correlated quantum material that undergoes a fully reversible, temperature-driven solid-state phase transition. Due to the smooth and hysteresis-free nature of this unique insulator-to-metal phase transition enabled them to engineer the temperature dependence of […]
Engineers develop novel strategy for designing tiny semiconductor particles for wide-ranging applications
Science Daily January 25, 2019 An international team of researchers (Singapore, China) has developed a cheaper and more scalable bottom-up synthesis strategy that can consistently construct TMD QDs (transition metal dichalcogenide quantum dots) of a specific size and properties. To demonstrate the proof-of-concept they synthesised MoS2 QDs with specific properties for biomedical applications. They have successfully synthesised a small library of seven TMD QDs and were able to alter their electronic and optical properties accordingly. They process can be used to optimize TMD QDs for applications such as the next generation TV and electronic device screens, advanced electronics components and […]
New quantum materials could take computers beyond the semiconductor era
Berkeley News December 3, 2018 A team of researchers in the US (UC Berkeley, industry) propose a way to turn multiferroics and topological materials, into logic and memory devices that will be 10 to 100 times more energy-efficient than foreseeable improvements to current microprocessors. MESO is based on a multiferroic material consisting of bismuth, iron and oxygen (BiFeO3) that is both magnetic and ferroelectric. They report that they have reduced the voltage needed for multiferroic magneto-electric switching from 3 volts to 500 millivolts and predict that it should be possible to reduce this to 100 millivolts: one-fifth to one-tenth that […]