/ en-us 萌妹社区 internet news portal provides the latest news on science including: 萌妹社区ics, 萌妹社区, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. An international research team led by QuTech has realized a three-site Kitaev chain using semiconducting quantum dots coupled by superconducting segments in a hybrid InSb/Al nanowire. When comparing two-and three-site chains within the same device, they observed that extending the chain to three sites increased the stability of the zero-energy modes. This work demonstrates the scalability of quantum-dot-based Kitaev chains and their potential to host stable Majorana zero modes. The researchers published their results in Nature 萌妹社区. /news/2025-03-site-kitaev-chain-stability-majorana.html Nanophysics Mon, 31 Mar 2025 13:45:03 EDT news662647501 A moir茅 pattern appears when you stack and rotate two copies of an image with regularly repeating shapes, turning simple patterns of squares or triangles into a groovy wave pattern that moves across the combined image in an optical delight. /news/2025-03-moir-eye-phasons-enable-interlayer.html Nanophysics Mon, 24 Mar 2025 13:03:04 EDT news662040182 In a leap forward for quantum computing, a Microsoft team led by UC Santa Barbara physicists on Wednesday unveiled an eight-qubit topological quantum processor, the first of its kind. The chip, built as a proof-of-concept for the scientists' design, opens the door to the development of the long-awaited topological quantum computer. /news/2025-02-topological-quantum-processor-majorana-modes.html Quantum 萌妹社区ics Thu, 20 Feb 2025 16:28:03 EST news659291281 萌妹社区icists have long theorized the existence of a unique state of matter known as a quantum spin liquid. In this state, magnetic particles do not settle into an orderly pattern, even at absolute zero temperature. Instead, they remain in a constantly fluctuating, entangled state. /news/2024-12-physicists-uncover-strong-interactions-quantum.html Quantum 萌妹社区ics Thu, 12 Dec 2024 13:03:04 EST news653230981 For the first time, scientists have observed a collection of particles, also known as a quasiparticle, that's massless when moving one direction but has mass in the other direction. The quasiparticle, called a semi-Dirac fermion, was first theorized 16 years ago, but was only recently spotted inside a crystal of semi-metal material called ZrSiS. The observation of the quasiparticle opens the door to future advances in a range of emerging technologies from batteries to sensors, according to the researchers. /news/2024-12-particle-mass.html General 萌妹社区ics Condensed Matter Tue, 10 Dec 2024 11:15:31 EST news653051727 A collaborative research team has identified the world's first multiple Majorana zero modes (MZMs) in a single vortex of the superconducting topological crystalline insulator SnTe and exploited crystal symmetry to control the coupling between the MZMs. /news/2024-08-physics-multiple-majorana-modes-superconducting.html Superconductivity Thu, 29 Aug 2024 13:06:03 EDT news644155561 Using interference between two lasers, a research group led by scientists from RIKEN and NTT Research have created an "optical conveyor belt" that can move polaritons鈥攁 type of light-matter hybrid particle鈥攊n semiconductor-based microcavities. This work could lead to the development of new devices with applications in areas such as quantum metrology and quantum information. /news/2024-05-scientists-optical-conveyor-belt-quasiparticles.html Optics & Photonics Tue, 14 May 2024 08:50:04 EDT news634895401 A TU/e and Catalan Institute of Nanoscience and 萌妹社区-led collaboration involving researchers from around the world has the answer, and the why, and the results have been published in the journal Science Advances. /news/2024-02-electron-phonon-graphene-sandwich.html Nanophysics Nanomaterials Mon, 12 Feb 2024 10:26:18 EST news626955973 Engineers at Columbia University and theoretical collaborators at the Max Planck for the Structure and Dynamics of Matter have found that pairing laser light to crystal lattice vibrations can enhance the nonlinear optical properties of a layered 2D material. The research is published in the journal Nature Communications. /news/2023-12-pair-laser-crystal-lattice-vibrations.html Condensed Matter Optics & Photonics Wed, 27 Dec 2023 10:35:05 EST news622895700 Researchers from Lancaster University in the UK have discovered how superfluid helium 3He would feel if you could put your hand into it. Dr. Samuli Autti is the lead author of the research published in Nature Communications. /news/2023-11-2d-quantum-superfluid.html Condensed Matter Quantum 萌妹社区ics Thu, 02 Nov 2023 06:00:01 EDT news618071301 Picture a nanoscale dance floor full of independently moving particles. When things really start to heat up鈥攐r, in this case, cool down鈥攑articles partner off, but on opposite sides of the space, "dancing" in synch as if telepathically. /news/2023-09-helium-three-superfluid-particles-pair-space.html Superconductivity Quantum 萌妹社区ics Thu, 21 Sep 2023 11:25:04 EDT news614514301 Magnetic skyrmions have received much attention as promising, topologically protected quasiparticles with applications in spintronics. Skyrmions are small, swirling topological magnetic excitations with particle-like properties. Nevertheless, the lower stability of magnetic skyrmions only allow them to exist in a narrow temperature range, with low density of the particles, thus implying the need for an external magnetic field, which greatly limits their wider applications. /news/2023-09-generating-biskyrmions-rare-earth-magnet.html Condensed Matter Sat, 16 Sep 2023 09:40:01 EDT news613989545 Many substances change their properties when they are cooled below a certain critical temperature. Such a phase transition occurs, for example, when water freezes. However, in certain metals there are phase transitions that do not exist in the macrocosm. They arise because of the special laws of quantum mechanics that apply in the realm of nature's smallest building blocks. /news/2023-07-electrons-slowly-cooling-effect-unique.html Condensed Matter Quantum 萌妹社区ics Mon, 31 Jul 2023 11:58:04 EDT news610023482 Quantum computing could revolutionize our world. For specific and crucial tasks, it promises to be exponentially faster than the zero-or-one binary technology that underlies today's machines, from supercomputers in laboratories to smartphones in our pockets. But developing quantum computers hinges on building a stable network of qubits鈥攐r quantum bits鈥攖o store information, access it and perform computations. /news/2023-06-quantum-magnetic.html Quantum 萌妹社区ics Tue, 27 Jun 2023 15:42:55 EDT news607099370 Excitations in solids can also be represented mathematically as quasiparticles; for example, lattice vibrations that increase with temperature can be well described as phonons. Mathematically, also quasiparticles can be described that have never been observed in a material before. If such "theoretical" quasiparticles have interesting talents, then it is worth taking a closer look. Take fractons, for example. /news/2023-05-fractons-storage-tangible.html Condensed Matter Quantum 萌妹社区ics Fri, 26 May 2023 13:01:49 EDT news604324907 New experiments using one-dimensional gases of ultra-cold atoms reveal a universality in how quantum systems composed of many particles change over time following a large influx of energy that throws the system out of equilibrium. A team of physicists at Penn State showed that these gases immediately respond, "evolving" with features that are common to all "many-body" quantum systems thrown out of equilibrium in this way. A paper describing the experiments appears May 17, 2023 in the journal Nature. /news/2023-05-uncovering-universal-physics-dynamics-quantum.html Quantum 萌妹社区ics Wed, 17 May 2023 17:08:03 EDT news603562076 Spintronic devices are emerging technologies that exploit the intrinsic spin of electrons to store and process data. These technologies have the potential to outperform conventional electronics both in terms of speed and energy-efficiency. /news/2023-01-modulating-magnetism-weyl-semi-metal-current-assisted.html General 萌妹社区ics Condensed Matter Mon, 30 Jan 2023 09:50:10 EST news594294590 A pressing quest in the field of nanoelectronics is the search for a material that could replace silicon. Graphene has seemed promising for decades. But its potential has faltered along the way, due to damaging processing methods and the lack of a new electronics paradigm to embrace it. With silicon nearly maxed out in its ability to accommodate faster computing, the next big nanoelectronics platform is needed now more than ever. /news/2022-12-team-graphene-based-nanoelectronics-platform.html Nanophysics Nanomaterials Wed, 21 Dec 2022 14:50:03 EST news590856601 萌妹社区icists have created the first Bose-Einstein condensate鈥攖he mysterious fifth state of matter鈥攎ade from quasiparticles, entities that do not count as elementary particles but that can still have elementary-particle properties like charge and spin. For decades, it was unknown whether they could undergo Bose-Einstein condensation in the same way as real particles, and it now appears that they can. The finding is set to have a significant impact on the development of quantum technologies including quantum computing. /news/2022-10-quasiparticle-bose-einstein-condensate.html Condensed Matter Quantum 萌妹社区ics Tue, 25 Oct 2022 12:40:56 EDT news585920452 A team of researchers from the University of Warsaw in Poland, the Institute Pascal CNRS in France, the Military University of Technology in Poland and the British University of Southampton has shown that it is possible to control the so-called exceptional points. For the first time, physicists also observed the annihilation of exceptional points from different degeneracy points. You can read about the discovery that may contribute to the creation of modern optical devices in the latest Nature Communications. /news/2022-10-annihilation-exceptional-degeneration.html Optics & Photonics Quantum 萌妹社区ics Fri, 14 Oct 2022 12:40:02 EDT news584969904 Topological materials that possess certain atomic-level symmetries, including topological insulators and topological semi-metals, have elicited fascination among many condensed matter scientists because of their complex electronic properties. Now, researchers in Japan have demonstrated that a normal semiconductor can be transformed into a topological semi-metal by light irradiation. Further, they showed how spin-dependent responses could appear when illuminated with circularly-polarized laser light. Published in 萌妹社区ical Review B, this work explores the possibility of creating topological semi-metals and manifesting new physical properties by light control, which may open up a rich physical frontier for topological properties. /news/2022-09-theoretical-description-light-induced-topological-states.html Condensed Matter Optics & Photonics Mon, 12 Sep 2022 08:27:03 EDT news582190021 Excitons are quasiparticles that are formed in insulators or semiconductors when an electron is promoted to a higher energy band, leaving a positively charged hole behind. /news/2022-09-evidence-excitonic-insulators-moir-superlattices.html General 萌妹社区ics Quantum 萌妹社区ics Wed, 07 Sep 2022 10:30:01 EDT news581765281 A new, multi-node FLEET review, published in Matter, investigates the search for Majorana fermions in iron-based superconductors. /news/2022-06-majorana-fermions-potential-technology-resistance.html Superconductivity Quantum 萌妹社区ics Wed, 22 Jun 2022 10:03:08 EDT news575110982 Working with a quantum material known as a kagome magnet, a team of Boston College physicists and colleagues have directly measured how individual electronic quantum states in the novel material respond to external magnetic fields by shifting energy in an unusual manner, the researchers report in the latest online edition of the journal聽Nature 萌妹社区ics. /news/2022-03-external-magnetic-field-shift-electronic.html Condensed Matter Quantum 萌妹社区ics Mon, 28 Mar 2022 12:25:45 EDT news567689138 Supersymmetry is symmetry of nature that is often hypothesized to exist among elementary particles. In a new paper that appeared in 萌妹社区ical Review Letters this week, physicists from the University of Amsterdam and QuSoft propose a setup where supersymmetry can also be observed between lumps of energy in a material鈥攕o-called kinks and skinks. /news/2022-02-kinks-skinks-supersymmetry.html Quantum 萌妹社区ics Mon, 07 Feb 2022 07:39:02 EST news563441937 High-precision measurements have provided important clues about processes that impair the efficiency of superconductors. Future work building on this research could offer improvements in a range of superconductor devices, such quantum computers and sensitive particle detectors. /news/2021-12-moments-silence-superconductors.html Superconductivity Mon, 20 Dec 2021 11:00:01 EST news559219987 Quantum entanglement occurs when two particles appear to communicate without a physical connection, a phenomenon Albert Einstein famously called "spooky action at a distance." Nearly 90 years later, a team led by the U.S. Department of Energy's Oak Ridge National Laboratory demonstrated the viability of a "quantum entanglement witness" capable of proving the presence of entanglement between magnetic particles, or spins, in a quantum material. /news/2021-11-key-witness-scientists-spooky-quantum.html Quantum 萌妹社区ics Mon, 08 Nov 2021 12:08:57 EST news555595733 In a new report now published in Science, primary authors Zhen Zhu, Michal Papaj, and an international research team in physics, materials science, and condensed matter at the Jiao Tong University, China, Massachusetts Institute of Technology, U.S., and the Chinese Academy of Sciences discovered the Fermi surface of supercurrent-induced quasiparticles in a superconducting system for the first time. This discovery comes 50 years after the initial theoretical prediction was made by physicist Peter Fulde and revealed the impact of the finite Cooper pair momentum on the quasiparticle spectrum. In condensed matter physics, Cooper pairs are a pair of electrons with opposite spins loosely bound due to electron-lattice interactions. Superconductivity is based on their condensation to Bosonic states at low temperatures. The interplay of superconductivity and magnetic fields leads to the phenomenon of a 'segmented Fermi surface." A leading author of this work, MIT Professor of 萌妹社区ics Liang Fu, outlined the significance of this discovery. /news/2021-11-discovery-segmented-fermi-surface-cooper.html Condensed Matter Superconductivity Mon, 08 Nov 2021 09:10:02 EST news555584679 Magic-angle twisted bilayer graphene is a material made of two sheets of graphene placed on top of each other, with one sheet twisted at precisely 1.05 degrees with respect to the other. This material has been found to be a very promising platform for studying different phases of matter, as it combines metallic, superconducting, magnetic and insulating phases in a single crystal. /news/2021-10-symmetry-bilayer-graphene.html Nanophysics Nanomaterials Mon, 18 Oct 2021 12:20:01 EDT news553777753 Superconductivity is a physical phenomenon where the electrical resistance of a material drops to zero under a certain critical temperature. Bardeen-Cooper-Schrieffer (BCS) theory is a well-established explanation that describes superconductivity in most materials. It states that Cooper pairs of electrons are formed in the lattice under sufficiently low temperature and that BCS superconductivity arises from their condensation. While graphene itself is an excellent conductor of electricity, it does not exhibit BCS superconductivity due to the suppression of electron-phonon interactions. This is also the reason that most 'good' conductors such as gold and copper are 'bad' superconductors. /news/2021-07-mechanism-superconductivity-graphene.html Nanophysics Nanomaterials Wed, 14 Jul 2021 12:34:38 EDT news545484876