Articles tagged with Superfluidity
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Scientists developed new theory capturing second sound phenomenon in quantum liquids, showing it can be faster than first sound. Theoretical approach uses squeezed-field path integral description, applicable to various phenomena at quantum-classical physics interface.
New Zealand and Australian researchers have observed a 70-year-old prediction about superfluids, which may have implications for understanding quark-gluon plasmas and electrons in solids. The team created a superfluid using optical manipulation technology and precisely stirred vortices into the fluid.
A recent study resolves a long-standing debate about what happens at the microscopic level when matter transitions into a superconducting or superfluid state. Correlations between pairs of atoms in an ultra-cold gas were found to grow suddenly as the system was cooled below the superfluid transition temperature.
Researchers have observed hallmarks of supersolidity in ultracold atomic gases, featuring a self-determined crystalline structure while sharing the same macroscopic wavefunction. The dysprosium quantum gas realization shows unprecedented stability, paving the way for probing its excitation spectrum and superfluid behavior.
Researchers have documented 'walls bound by strings' in superfluid helium-3 for the first time, potentially helping explain how the universe cooled down after the Big Bang. The findings may also provide a model for topological quantum computing.
Researchers at the University of Hamburg disrupt crystalline order in a quantum system using light pulses, restoring superfluidity. The study demonstrates a fundamental mechanism for controlling phase transitions in many-body systems via light control.
Researchers at Graz University of Technology have achieved a breakthrough in observing the reaction of a quantum fluid to photoexcitation of dissolved particles. By applying femtosecond spectroscopy, they were able to describe the processes in an approximately five-nanometer sized superfluid helium droplet after photoexcitation of an a...
Researchers have explained 'electron-hole reverse drag' and exciton formation using a multiband approach, revealing the bandgap's role in dual-layer graphene structures. This new understanding opens possibilities for ultra-low dissipation future electronics and room-temperature superfluid flow.
Researchers at Aalto University have created a time quasicrystal that demonstrates the self-sustaining oscillation and coherency of time crystals. This breakthrough could pave the way for real-world applications in quantum information processing devices.
Researchers at UT Dallas suggest a new type of matter that exhibits both zero viscosity and non-periodic structure. Theoretical framework proposes an experimental setup to produce the material, potentially creating a supersolid with unique properties.
Researchers at the University of Innsbruck have successfully detected roton excitations in a dipolar quantum gas for the first time. The discovery paves the way for further research into superfluidity and supersolid states, which exhibit both solid-like and fluid-like properties.
Physicists at Aalto University found friction in superfluid helium-3 isotopes despite being in laminar motion at zero temperature. The discovery could help understand turbulence in classical fluids and improve aerodynamics, as well as contribute to studying neutron stars.
Researchers at IST Austria have found that superfluid helium droplets act as magnetic monopoles from the perspective of molecules immersed inside them. This discovery opens up new possibilities for studying magnetic monopoles and reveals a previously unknown property in these systems.
Dr Dmitry Zmeev has been awarded a £1.4M EPSRC Career Fellowship to investigate the properties of superfluid helium 3He. His research aims to understand its unusual behavior and potential applications in nano-electronics and cosmology.
Scientists have observed room-temperature superfluidity in light, a phenomenon previously only seen at extremely low temperatures. This breakthrough could lead to the development of new photonic devices with reduced losses and enhanced performance.
The study simulates a complex quantum system that mimics classical physics and creates a 'necklace-like' state with spin-orbit coupling. The researchers found that there must always be an odd number of pearls in the necklace, depending on the strength of the spin-orbit coupling.
Physicists at Washington State University have created a fluid with negative mass, defying Newton's Second Law of Motion. By cooling rubidium atoms to absolute zero, they were able to create a state where the particles behave like waves and synchronize in unison, resulting in negative mass.
Mathematicians from Newcastle University discovered a new 'storm' layer in superfluid Helium that 'sticks' to surfaces like ordinary fluid. The layer is created by mini tornadoes tangling together, slowing the flow. This finding changes past assumptions about superfluids and their use as coolants and precision measurement devices.
Scientists found that entangled quantum information shared between two regions of a container is determined by surface area, not volume, in superfluid helium. This discovery points to deeper understanding of reality and may be a step toward a long-sought quantum theory of gravity.
Scientists at Aalto University discovered half-quantum vortices in superfluid helium, a topological defect that overcomes limitations of circulating currents. This breakthrough may enable access to isolated Majorana modes and exotic solitary particles, crucial for quantum information processing.
Research on new unconventional superconductors like K2Cr3As3 and Li1?xFexOHFeSe reveals robust superconductivity and full volume. Weyl semimetal TaP exhibits chiral magnetic states with huge magnetoresistance, triggering further studies.
Researchers at the University of Toronto have discovered a new set of rules governing the formation of materials with unusual properties, including superconductivity and superfluidity. By studying ultracold atomic interactions, they found a new type of pressure that arises from p-wave interactions.
Researchers at the University of Southampton have developed a new method for measuring the mass of pulsars, highly magnetised rotating neutron stars. This breakthrough technique relies on principles of nuclear physics and can be used to measure the mass of young pulsars in isolation.
Researchers at McGill University successfully tested the Tomonaga-Luttinger theory by creating a mini-faucet that slowed down superfluid helium flow as predicted. The experiment pushed the limits of nanoscale understanding, shedding light on cooperation among atoms in superfluid states.
Researchers at the University of Strathclyde and Pittsburgh created a 'ring geometry' form using polaritons, resulting in a highly specialized half-vortex rotation. This achievement marks a significant step towards the development of new quantum technologies.
Researchers at the University of Chicago have successfully created a roton structure in an atomic superfluid of cesium-133 using the shaken lattice technique. This breakthrough enables experimentation on long-cloaked mysteries of the roton, potentially paving the way for increased robustness in superconductors.
Theoretical studies have predicted the existence of exotic few-body correlations and interesting pairing states in spin-orbit coupled ultracold Fermi gases. Spin-orbit coupling modifies single-particle spectra, giving rise to these phenomena.
Researchers from the Institute of Physical Chemistry of the Polish Academy of Sciences developed a theory describing the phenomenon of mysterious communication between fluid reservoirs. The new model suggests that the effect can occur in classical one-component fluids and mixtures, not requiring quantum physics.
University of Chicago physicists explain a mysterious effect found in superfluids, revealing it was due to whirlpool-like structures rather than exotic solitons. The result challenged accepted theories and sparked a scientific debate.
Researchers detected quantum vortices in nanodroplets of liquid helium, forming a densely packed lattice. The droplets rotated at up to 14 million times per second, defying classical physics.
Researchers have discovered a well-organized 3-D grid of quantum tornadoes inside microscopic droplets of supercooled liquid helium. This formation provides proof of the droplets' quantum state and is different from the lone whirlpool that would form in a regular liquid.
Researchers successfully characterized quantum vortices in helium nanodroplets for the first time, revealing unique features and opening new avenues to study quantum rotation. The discovery confirms that helium nanodroplets are superfluid throughout and exhibit a single quantum object behavior.
Researchers use X-rays to explore helium nanodroplets, finding unprecedented quantities of quantum vortices that lead to extreme deformation and anomalous behavior. The study sheds light on the properties of superfluids at microscopic scales.
Scientists have designed a new material that could enable superconductivity at temperatures rivaling those seen in cuprates, potentially paving the way for more practical applications. The proposed design features layers of semiconductor compounds separated by insulator spacers, which would create indirect excitons that become superflu...
The new framework was used to understand the dynamics of quantized vortices and their interaction with electrons. The researchers discovered a novel mechanism of vortex multiplication, which explains why unidentified electron objects were found only at lower temperatures.
Researchers at JQI observe hysteresis in an ultracold atomic gas, a phenomenon crucial for electronics. By controlling the rotation of a quantum fluid, they create a stable two-velocity state that has implications for building practical atomtronic devices.
Researchers use holographic duality to translate physics of black holes to superfluid turbulence, discovering turbulent flows behave like 3-D fluids. This breakthrough helps explain complex behavior of superfluids and provides new insights into the dynamics of these materials.
Researchers from PTB and international partners have created superconducting sensors to detect the magnetic moments of helium-3 atoms with extreme sensitivity. This has allowed them to investigate the unique quantum liquid of helium-3 in detail, enabling the detection and investigation of excitations that behave like Majorana fermions.
In a groundbreaking experiment, scientists detected the second sound wave in an ultracold quantum gas, validating a fundamental theory of superfluidity developed by Lev Landau. The observation was made possible by controlling and manipulating individual atoms using lasers.
Pulsars suddenly increase speed in brief events called 'glitches,' but researchers question this phenomenon's explanation. A mathematical model shows that the available superfluid in a pulsar's crust is too small to cause such friction, contradicting current thinking.
Southampton researchers have developed a model that explains how pulsars slow down with age. The spin rate of a pulsar slows down due to energy loss through radiation, but the exact mechanism was unclear until now.
Researchers discovered a commonality among superconductors, Bose-Einstein condensates, magnets, crystals, neutron stars, and cosmic strings. The Nambu-Goldstone boson theory applies to all these phenomena, predicting or designing unusual behavior in new materials.
A team of physicists has devised a theoretical framework that explains the real-time behavior of superfluids made of fermions, a crucial step towards studying neutron stars. The researchers used the world's most powerful supercomputer to simulate complex calculations, shedding light on the properties of these enigmatic objects.
Researchers have found direct evidence of a superfluid state at the core of a neutron star using NASA's Chandra X-ray Observatory data. This discovery has important implications for understanding nuclear interactions in matter at high densities.
JILA team finds similar behavior in ultracold atomic gases and high-temperature superconductors, supporting the idea that studying superfluidity in atomic gases can help understand complicated superconductors. The discovery lends support to the concept of a 'pseudo-gap region' where atom pairing occurs above critical temperature.
Physicists at NIST and the University of Maryland have proposed a method for creating a supersolid, an exotic state of matter that behaves as both a solid and a friction-free superfluid. The team identified clear experimental signatures, verifying the simultaneous existence of these properties in ultracold atoms.
Scientists at JILA have developed a powerful new technique to study ultracold atomic gases, revealing previously hidden properties. The technique, using photoemission spectroscopy, simultaneously probes energy and momentum, providing insights into the pairing of atoms.
Scientists at Washington University in St. Louis have detailed the interaction between a superfluid and a superconductor, which could change our understanding of neutron stars' motion. The research reveals exotic behavior at the boundary between type I and type II superconductors, with unexpected effects on magnetic fields.
Researchers at NIST create a stable superfluid flow in an ultracold atomic gas using laser light and magnetic fields. This breakthrough may lead to precise navigation gyroscopes and deeper physics insights.
Emil Yuzbashyan, a Rutgers University physicist, has received the Packard Foundation Fellowship for Science and Engineering. The five-year, $625,000 award supports his research on properties of matter at temperatures near absolute zero, which could lead to breakthroughs in quantum devices and superconductivity.
Researchers at the University of Illinois have developed a model that explains the avalanche-like behavior of superfluid helium. The model balances interaction and disorder, revealing a high-temperature synchronous regime and a low-temperature asynchronous regime.
Physicists at JILA used vortex lattices to visualize defects in rotating patterns, which could aid in studying superconductors. The experiments simulated the behavior of superfluids and optical lattices, creating a new method for understanding material defects.
Using laser light as a substitute for superfluids, the team observed unusual behavior of particles, including shock waves and interactions that had not been considered before. This new technique has the potential to advance our understanding of condensed matter physics and lead to breakthroughs in sensor technology and atomic trapping.
Physicists have observed an elusive quantum state where fermions with mismatched numbers of dance partners exhibit unbalanced superfluid behavior. This finding has opened new avenues for investigation, particularly in the context of exotic matter found in Quark Stars.
For the first time, researchers at Rice University have succeeded in creating and observing an elusive and long-sought quantum state. The team cooled a mixture of fermionic lithium-6 atoms to extremely low temperatures, allowing them to study superfluidity with precision.
Researchers at MIT have successfully observed fermionic superfluidity in a lithium-6 isotope, enabling the study of high-temperature superconductivity. The team achieved this by cooling gas close to absolute zero and trapping it using laser beams.
Researchers John S. Wettlaufer and J. G. Dash propose an alternative explanation for the behavior of a solid isotope of helium at low temperatures. They suggest that a thin, lubricating superfluid film forms between the solid and its container due to melting at the boundary, which occurs in all solids.
Researchers at the University of Chicago and Innsbruck University successfully synthesized ultracold molecules by binding two atoms together, opening up new possibilities for superchemistry and quantum computing. This breakthrough could lead to the development of quantum computers that work much faster than current computers.
Scientists have observed a novel superfluid state in a lithium-6 atom gas, exhibiting properties that challenge traditional bosonic and fermionic behaviors. This breakthrough discovery has implications for the development of room temperature superconductors and our understanding of exotic plasmas.
Physicists at UC Berkeley have successfully produced a quantum whistle in superfluid helium-4 using an array of tiny holes. The whistle is achieved at a temperature of 2 Kelvin, making the sensors user-friendly for scientists unfamiliar with cryogenic technology.