https://phys.org/physics-news/quantum-physics en-us The latest news on quantum physics, wave particle duality, quantum theory, quantum mechanics, quantum entanglement, quantum teleportation, and quantum computing. A research team led by the Paul Scherrer Institute has spectroscopically observed the fractionalization of electronic charge in an iron-based metallic ferromagnet. Experimental observation of the phenomenon is not only of fundamental importance. Since it appears in an alloy of common metals at accessible temperatures, it holds potential for future exploitation in electronic devices. The discovery is published in the journal Nature. https://phys.org/news/2024-03-weird-electron-behavior-weirder-fractionalization.html Condensed Matter Quantum Physics Wed, 06 Mar 2024 12:29:06 EST news628950541 Two physicists at the University of Konstanz are developing a method that could enable the stable exchange of information in quantum computers. In the leading role: photons that make quantum bits "fly." https://phys.org/news/2024-03-photons-quantum-bits-fly-stable.html Optics & Photonics Quantum Physics Wed, 06 Mar 2024 11:47:03 EST news628948021 For more than a decade it has been possible for physicists to accurately measure the location of individual atoms to a precision smaller than one-thousandth of a millimeter using a special type of microscope. However, this method has so far only provided the x and y coordinates. Information on the vertical position of the atom is lacking. https://phys.org/news/2024-03-method-3d-position-individual-atoms.html Optics & Photonics Quantum Physics Tue, 05 Mar 2024 12:01:04 EST news628862462 Scientists will work to channel the huge emerging power of quantum computers for the common good at a new institute that opened in Geneva on Tuesday, its founders said. https://phys.org/news/2024-03-scientists-hub-channel-quantum-power.html Quantum Physics Tue, 05 Mar 2024 10:37:14 EST news628857420 Universal behavior is a central property of phase transitions, which can be seen, for example, in magnets that are no longer magnetic above a certain temperature. A team of researchers from Kaiserslautern, Berlin and Hainan, China, has succeeded for the first time in observing such universal behavior in the temporal development of an open quantum system, a single cesium atom in a bath of rubidium atoms. https://phys.org/news/2024-03-quantum-universal-behavior.html Quantum Physics Tue, 05 Mar 2024 09:32:03 EST news628853521 In work published in Physical Review Letters researchers at Osaka University's Institute of Scientific and Industrial Research (SANKEN) used "the shortcuts to the adiabaticity (STA)" method to greatly speed-up the adiabatic evolution of spin qubits. The spin flip fidelity after pulse optimization can be as high as 97.8% in GaAs quantum dots. This work may be applicable to other adiabatic passage and may be useful for fast and high-fidelity quantum control. https://phys.org/news/2024-03-shortcut-success-fast-robust-quantum.html Condensed Matter Quantum Physics Tue, 05 Mar 2024 09:06:03 EST news628851962 A research group led by Prof. Yang Yong from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences has revealed the role of neighboring adsorbate and quantum tunneling in the diffusion of hydrogen on a graphene surface, which opens a possible way for ultrahigh precision measurement based on atomic systems, in particular, exploring the existence of a minimum length. https://phys.org/news/2024-03-scientists-reveal-role-neighboring-adsorbates.html Quantum Physics Mon, 04 Mar 2024 14:45:28 EST news628785926 In Nature Physics, the LSU Quantum Photonics Group offers fresh insights into the fundamental traits of surface plasmons, challenging the existing understanding. Based on experimental and theoretical investigations conducted in Associate Professor Omar Magaña-Loaiza's laboratory, these novel findings mark a significant advancement in quantum plasmonics, possibly the most noteworthy in the past decade. https://phys.org/news/2024-03-multiparticle-nanostructures-quantum-technologies.html Optics & Photonics Quantum Physics Mon, 04 Mar 2024 12:00:01 EST news628775481 Just over a week ago, European physicists announced they had measured the strength of gravity on the smallest scale ever. https://phys.org/news/2024-03-gravity-kitchen-table-tiny-big.html General Physics Quantum Physics Mon, 04 Mar 2024 11:10:01 EST news628772387 Quantum sensor technology promises even more precise measurements of physical quantities. A team led by Christian Roos at the University of Innsbruck has now compared the signals of up to 91 quantum sensors with one another and thus successfully eliminated the noise caused by interactions with the environment. https://phys.org/news/2024-03-spectroscopy-network-quantum-sensors-boosts.html Optics & Photonics Quantum Physics Mon, 04 Mar 2024 09:41:12 EST news628767669 The thermal hall effect (THE) is a physical phenomenon characterized by tiny transverse temperature differences occurring in a material when a thermal current passes through it and a perpendicular magnetic field is applied to it. This effect has been observed in a growing number of insulators, yet its underlying physics remains poorly understood. https://phys.org/news/2024-03-evidence-phonon-chirality-impurity-antiferromagnetic.html Condensed Matter Quantum Physics Fri, 01 Mar 2024 07:20:01 EST news628499249 The question of where the boundary between classical and quantum physics lies is one of the longest-standing pursuits of modern scientific research, and in new research published today, scientists demonstrate a novel platform that could help us find an answer. https://phys.org/news/2024-02-scientists-nanoparticles-unravel-quantum-limits.html Quantum Physics Fri, 01 Mar 2024 05:00:01 EST news628444354 Playing a different soundtrack is, physically speaking, only a minute change of the vibration spectrum, yet its impact on a dance floor is dramatic. People long for this tiny trigger, and as a salsa changes to a tango completely different collective patterns emerge. https://phys.org/news/2024-02-music-cooperative-electronic-states-kagome.html Condensed Matter Quantum Physics Thu, 29 Feb 2024 10:31:03 EST news628425061 A research team led by Prof. Dr. Yang Yong from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences has revealed a remarkable quantum tunneling phenomenon across double potential barriers. They found that quantum tunneling is dominant at low temperatures and continues to play a nontrivial role at temperatures up to about 600 K. https://phys.org/news/2024-02-resonant-tunneling-probe-minimum-length.html Quantum Physics Thu, 29 Feb 2024 10:07:50 EST news628423667 Scientists have created a reprogrammable light-based processor, a world-first, that they say could usher in a new era of quantum computing and communication. https://phys.org/news/2024-02-capabilities.html Optics & Photonics Quantum Physics Wed, 28 Feb 2024 10:17:42 EST news628337858 A research team from the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) and the University of Salerno in Italy has discovered that thin films of elemental bismuth exhibit the so-called non-linear Hall effect, which could be applied in technologies for the controlled use of terahertz high-frequency signals on electronic chips. https://phys.org/news/2024-02-tunable-room-temperature-nonlinear-hall.html Condensed Matter Quantum Physics Wed, 28 Feb 2024 08:27:41 EST news628331257 The simplest possible molecule H2+ was one of the very first molecules to form in the cosmos. This makes it significant for astrophysics, but also an important object of research for fundamental physics. However, it is difficult to study in experiments. https://phys.org/news/2024-02-simplest-molecule-precise-theoretical.html Optics & Photonics Quantum Physics Tue, 27 Feb 2024 09:58:03 EST news628250281 Topological wave structures are wave patterns that exhibit specific topological properties, or in other words, properties that remain unvaried under smooth deformations of a physical system. These structures, such as vortices and skyrmions, have attracted significant attention within the physics research community. https://phys.org/news/2024-02-theoretical-description-topological.html Soft Matter Quantum Physics Tue, 27 Feb 2024 06:30:01 EST news628164006 For years, niobium was considered an underperformer when it came to superconducting qubits. Now, scientists supported by Q-NEXT have found a way to engineer a high-performing niobium-based qubit and take advantage of niobium's superior qualities. https://phys.org/news/2024-02-resurrecting-niobium-quantum-science.html Condensed Matter Quantum Physics Mon, 26 Feb 2024 12:53:03 EST news628174381 Scientists at Paderborn University have used a new method to determine the characteristics of optical quantum states. For the first time, they are using certain photon detectors—devices that can detect individual light particles—for so-called homodyne detection. https://phys.org/news/2024-02-properties-scientists-method-quantum-states.html Optics & Photonics Quantum Physics Mon, 26 Feb 2024 11:04:14 EST news628167852 Scientists are a step closer to unraveling the mysterious forces of the universe after working out how to measure gravity on a microscopic level. https://phys.org/news/2024-02-scientists-closer-quantum-gravity-theory.html Quantum Physics Fri, 23 Feb 2024 14:00:01 EST news627905003 In a novel experiment, physicists have observed long range quantum coherence effects due to Aharonov-Bohm interference in a topological insulator-based device. This finding opens up a new realm of possibilities for the future development of topological quantum physics and engineering. https://phys.org/news/2024-02-scientists-exotic-quantum-effect-topological.html Condensed Matter Quantum Physics Thu, 22 Feb 2024 08:44:06 EST news627813842 If the fractional quantum Hall regime were a series of highways, these highways would have either two or four lanes. The flow of the two-flux or four-flux composite fermions, like automobiles in this two- to four-flux composite fermion traffic scenario, naturally explains the more than 90 fractional quantum Hall states that form in a large variety of host materials. Physicists at Purdue University have recently discovered, though, that fractional quantum Hall regimes are not limited to two-flux or four-flux and have discovered the existence of a new type of emergent particle, which they are calling six-flux composite fermion. https://phys.org/news/2024-02-physicists-quantum-state-emergent-particles.html Condensed Matter Quantum Physics Wed, 21 Feb 2024 16:49:03 EST news627756541 The electron is the basic unit of electricity, as it carries a single negative charge. This is what we're taught in high school physics, and it is overwhelmingly the case in most materials in nature. https://phys.org/news/2024-02-electrons-fractions-graphene.html Quantum Physics Wed, 21 Feb 2024 11:00:01 EST news627724397 Our physical, 3D world consists of just two types of particles: bosons, which include light and the famous Higgs boson; and fermions—the protons, neutrons, and electrons that comprise all the "stuff," present company included. https://phys.org/news/2024-02-phase-physicists-abelian-anyons-quantum.html Quantum Physics Wed, 21 Feb 2024 10:32:24 EST news627733942 In the future, the use of quantum computers could make a significant contribution to promoting greater sustainability in global developments. This was shown in a white paper, which was recently presented at the UN Climate Change Conference in Dubai and included contributions from the HPCQS consortium. https://phys.org/news/2024-02-doubly-sustainable-quantum.html General Physics Quantum Physics Tue, 20 Feb 2024 16:22:02 EST news627668521 Researchers from Oxford University's Department of Physics have made a breakthrough in creating and designing magnetic whirls in membranes that can be seamlessly integrated with silicon. These hurricane-like magnetic whirls, thought to move at incredible speeds of up to kilometers per second could be used as information carriers in a new generation of green and super-fast computing platforms. https://phys.org/news/2024-02-breakthrough-silicon-compatible-magnetic.html Condensed Matter Quantum Physics Tue, 20 Feb 2024 10:09:03 EST news627646141 While atomic clocks are already the most precise timekeeping devices in the universe, physicists are working hard to improve their accuracy even further. One way is by leveraging spin-squeezed states in clock atoms. https://phys.org/news/2024-02-quantum-dark-states-advantage-noise.html Optics & Photonics Quantum Physics Mon, 19 Feb 2024 15:15:03 EST news627578101 A collaborative project has made a breakthrough in enhancing the speed and resolution of widefield quantum sensing, leading to new opportunities in scientific research and practical applications. https://phys.org/news/2024-02-widefield-diamond-quantum-neuromorphic-vision.html Optics & Photonics Quantum Physics Mon, 19 Feb 2024 12:51:11 EST news627569468 Quantum computing engineers at UNSW Sydney have shown they can encode quantum information—the special data in a quantum computer—in four unique ways within a single atom, inside a silicon chip. https://phys.org/news/2024-02-quantum-multiple-methods-atom.html Quantum Physics Mon, 19 Feb 2024 09:55:04 EST news627558901