Articles tagged with Quantum Dynamics
Researchers at TU Wien and Hiroshima University have corrected a long-standing flaw in the double-slit experiment, proving that individual particles can move along multiple paths at once. By detecting a single neutron, they were able to determine its presence on each path with high accuracy.
Researchers studied ultrafast control of single-photon emitters in hexagonal boron nitride using laser pulses. They developed a comprehensive understanding of the dynamics within colour centres, which can help avoid perturbations in future applications.
AV3Sb5 kagome metals exhibit unusual quantum phenomena such as high-temperature superconductivity. Researchers identified four Van Hove singularities near the Fermi level, which enhance correlation effects and lead to competing orders.
Researchers at University of Innsbruck and ETH Zurich propose a new concept for a high-precision quantum sensor using microcavities and levitated nanoparticles. By exploiting fast unstable dynamics, they demonstrate mechanical squeezing reducing motional fluctuations below zero-point motion.
Researchers developed a novel framework to characterize weakly chaotic dynamics in complex systems with many constituent parts. By investigating Lyapunov spectrum scaling, they identified emerging quasi-conserved quantities that shed light on quantum computation and physical models.
Researchers investigated the shortest possible time scale of optoelectronic phenomena and found that it cannot be increased beyond one petahertz. The experiments used ultra-short laser pulses to create free charge carriers in materials, which were then moved by a second pulse to generate an electric current.
Researchers developed TDAP method for investigating precise ultrafast processes in matter, providing robust dynamic simulations based on quantum mechanical principles. The approach has been applied to strong field physics and photocatalysis, demonstrating effective treatment of ultrafast quantum dynamical processes.
A research team at POSTECH has developed a weak-value amplification method to achieve quantum metrology precision without using entangled resources. This breakthrough enables the practical use of quantum metrology by verifying that entanglement is not an absolute requirement for reaching the Heisenberg limit.
A team led by Prof. PAN Jianwei from the University of Science and Technology of China has successfully measured second sound attenuation in a controlled experiment using ultra-cold lithium-6, verifying the dynamic scaling theory and paving the way for further research on quantum critical regions.
Rice University physicists have developed a technique to engineer Rydberg states of ultracold strontium atoms, creating 'synthetic dimensions' that simulate real materials. This breakthrough enables the creation of interacting particles in a controlled environment, paving the way for new physics and material properties.
Researchers created a stable surface with exceptional points, demonstrating perfect light absorption in a coherent system. The discovery enables the investigation of new physics and potential applications for better sensors and novel ways of controlling light-matter interaction.
A team of researchers demonstrates an adaptive optimization protocol that can engineer arbitrary high-dimensional quantum states, overcoming limitations due to noise and experimental imperfections. The protocol uses measured agreement between produced and target state to tune experimental parameters.
A new study shows that quantum systems can exist in a superposition of forward and backward time flows, blurring the traditional concept of time. This phenomenon has practical implications for quantum thermodynamics, potentially offering advantages in thermal machines and refrigerators.
Researchers find that triangular-patterned materials can exhibit a mashup of three different phases, with each phase overlapping and competing for dominance. As temperature increases, the material becomes more ordered due to the breaking down of these competing electron arrangements.
Researchers used reinforcement learning to control a small particle moving in a double-well system, achieving accurate control despite noisy measurements. The method shows promise for future applications in quantum technologies and AI.
A new analytical technique combines quantum physics and molecular biology to track biomolecule changes in less than a trillionth of a second. By analyzing the collective movement of atoms, researchers were able to reduce 6000 dimensions to four and characterize conical intersections of quantum states in complex molecules.
Researchers from Nagoya University have found a dynamical one-parameter scaling for surface roughness and entanglement entropy in random quantum systems. This discovery has implications for understanding nonequilibrium physics and classifying universal phenomena.
Researchers developed a method to detect topological phase using quench dynamics and synthetic frequency dimension, simplifying the characterization of non-equilibrium states. The study proposes a new approach for performing dynamical characterization of topological quantum phases in different models.
Assistant Professor Kang Hao Cheong and his team discovered that chaotic switching for quantum coin Parrondo's games has similar underlying ideas to encryption. They found that using pre-generated chaotic sequences enhances the work, making it easier to invert the encrypted message to obtain the original state.
The Center for Integration of Modern Optoelectronic Materials on Demand will develop new semiconductor materials and scalable manufacturing processes for applications in displays, sensors, and quantum communication. The center aims to connect academic research with industrial and governmental needs, educating a diverse STEM workforce.
Physicists have developed a new method to identify and address imperfections in materials for quantum computing. The technique, terahertz scanning near-field optical microscopy, has been used to optimize fabrication protocols and reduce decoherence.
Researchers at Nagoya City University have detected strongly entangled pair of protons on a nanocrystalline silicon surface. This breakthrough could enable the creation of more qubits and ultra-fast processing for supercomputing applications, revolutionizing quantum computing.
Researchers used full-dimensional quantum dynamics to investigate the non-adiabatic quenching of OH radicals by H2, finding good agreement with experimental results and resolving a theoretical flaw. The study highlights the importance of accurate modeling in understanding complex chemical reactions.
Researchers at Huazhong University of Science and Technology developed a scheme to identify and weigh quantum orbits in strong-field tunneling ionization. By introducing a second harmonic frequency, they can alter the photoelectron yield, allowing for accurate identification of quantum orbits. This breakthrough enables attosecond tempo...
A theoretical physicist has proved a decades-old claim that Quantum Chromo Dynamics (QCD) leads to light-weight pions, resolving the mystery of confinement. By using supersymmetry and anomaly mediation, Principal Investigator Hitoshi Murayama showed QCD indeed creates pions with extremely small mass.
Scientists discovered elusive type of spin dynamics in a quantum mechanical system, confirming a previously unproven hypothesis. The findings show that the Kardar-Parisi-Zhang scenario accurately describes changes in time of spin chains in certain quantum materials.
The review article discusses modulation strategies for 2D semiconductors, including Coulomb interaction modification and influencing factors like initial photocarrier distribution and phonon-assisted relaxation. Researchers aim to provide guidance for developing robust methods tuning photocarrier relaxation behaviors.
Researchers have successfully probed electronic angular momentum to a chemical reaction at the quantum state-resolved level, offering a detailed understanding of molecular crossed beam experiments and theoretical simulations. This breakthrough reveals subtle influences of electronic angular momentum on chemical product distributions.
A machine learning model permits full quantum description of the solvated electron, capturing its complex behavior and dynamics. The model revealed transient diffusion, a rare event not present in classical simulations.
Scientists from the Technical University of Munich and Norwegian University of Science and Technology have discovered a way to manipulate pseudospin in antiferromagnetic insulators, enabling the transport and detection of information. This discovery opens up new perspectives for information processing with antiferromagnets.
Researchers developed a new computational tool to predict spin dynamics in materials, enabling rapid design and identification of suitable materials for quantum computing applications. The approach has been applied to various materials, including silicon, iron, graphene, molybdenum disulfide, and gallium nitride, with promising results.
Scientists investigated how dynamic magnetic properties of individual molecular magnets change with orientation in a magnetic field. They found strong anisotropy, which is crucial for building functional quantum computer components.
Researchers at CCNY provide new insights on nanoscale spin thermalization dynamics, discovering that groups of electron spins can facilitate communication between isolated nuclear spins. This breakthrough could enable devices using electron and nuclear spins for quantum information processing or sensing at the nanoscale.
Scientists have observed quantum scattering resonances in NO+He inelastic collisions at temperatures ranging from 0.3 to 12.3 K. The study used high-resolution velocity map imaging technique and accurate quantum dynamics calculations, which are in excellent agreement with experimental results.
Researchers have discovered a novel way to couple the excitations of magnetic spins in two different thin films, leading to strong coupling and potential applications in spintronic and quantum systems. This dynamic coupling enables the exchange of energy between the two layers, allowing for longer-lasting magnetization dynamics.
Low-energy and high energy states in a layered superconducting material are found to be correlated. The study uses multidimensional spectroscopy to probe quantum coherence, producing coherent excitations lasting up to 500 femtoseconds.
Researchers discovered that applying vibrational motion in a periodic manner can prevent dissipations of desired electron states, making topological materials promising for technological applications. This approach, called dynamic stabilization, enhances protected topological states, enabling longer-lived electronic excitations.
Scientists at ICFO have created a new microscopy technique that allows them to study the dynamics of individual quantum dots without degrading the samples or relying on fluorescent labels. By using laser pulses to promote QDs into excited states, they can image and track the evolution of charged particles within the nanoscale.
Researchers have developed a new way to simulate quantum systems of many particles, allowing for the investigation of dynamic properties fully coupled to slowly moving ions. This approach overcomes limitations in previous methods and offers new insights into complex mutual interactions between particles in extreme environments.
Scientists have developed a protocol to measure ultrafast electronic dynamics with picosecond resolution, revealing the spatial oscillation of electrons at sub-terahertz frequencies. The detection scheme utilizes a quantum-mechanical resonant state formed beside the trap, providing new insights into nano-electronics and quantum computing.
Physicists at ETH Zurich create unifying platform to explore 'time crystals' in both classical and quantum regimes. They discover emergent dynamics at subharmonic frequencies in weakly-coupled modes, similar to those seen in quantum many-body systems.
Researchers have made substantial progress in engineering quantized gauge fields coupled to ultracold matter, a versatile platform for tackling complex problems in physics. By controlling the Peierls phase, neutral atoms can mimic charged particles moving in magnetic fields.
Researchers at Heidelberg University confirm theoretically predicted deviation from classical scale symmetry using ultracold lithium atoms. The study provides new insights into the behavior of systems like graphene and superconductors, revealing a stiffening effect with compression.
A team led by Professor Ebrahim Karimi creates a new quantum simulator that uses the properties of light to simulate periodic and closed structures in nature. The experiment reveals fundamentally different physics between ring-shaped and line-shaped systems, opening opportunities for developing efficient photonic-based quantum computers.
Researchers at LMU Munich have successfully generated dissipative solitons in passive free-space resonators, a breakthrough that enables the compression of laser pulses while increasing their peak power. This technique opens up new avenues for exploring ultrafast dynamics and precision spectroscopy.
Researchers develop a theory to characterize topological phases in equilibrium and non-equilibrium conditions, revealing emergent nontrivial topological patterns. The findings provide new insights into the detection of topological states and complex quantum dynamics in condensed matter physics.
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...
Scientists have solved the puzzle of trans 1,3-butadiene's electronic-structural dynamics using ultrafast laser spectroscopy. The research reveals an ultrafast competition between ethylenelike and polyenelike dynamics in butadiene.
Researchers develop new theoretical framework to describe quantum causal structures transformation. They found that continuous and reversible dynamics prevent definite causal structure from becoming indefinite, but specific circumstances can determine the causal order.
Researchers investigate electronic charges that form stripe patterns in lanthanum nickelate, discovering unexpected dynamics when using terahertz laser pulses to disrupt microscopic order. The study provides fundamental insights into the interactions between electrons and crystal lattice vibrations.
Researchers XiaoMing Li and ShiJun Liao found more than 600 new families of periodic orbits in the three-body problem using a new numerical simulation strategy. The discovery could lead to a deeper understanding of the system's behavior, with implications for our knowledge of chaotic dynamics.
Researchers developed a new framework for faster control of a quantum bit, accelerating switching with unprecedented speed. The technique enables less prone to errors in high-speed operation, paving the way for quantum applications like secure communications and simulation of complex systems.
A team of scientists used numerical methods to investigate the glass transition behavior of binary mixtures under supercompressed conditions. They found that the dynamic facilitation theory correctly predicted the relaxation dynamics in these systems, supporting its applicability to hard disk systems at high pressure.
Researchers have created a quantum simulator that can simulate the dynamics of many electrons interacting with each other within one billionths of a second. This ultrafast quantum simulator will serve as a basic tool to investigate the origin of physical properties of matter, including magnetism and superconductivity.
Scientists observe a Many-Body Localized state in ultracold atoms trapped in light crystals, where interactions fail to lead to thermalization. This peculiar insulating state retains a quantum memory of its initial state, even at elevated temperatures.
Researchers at Griffith University challenge quantum science foundations with a new theory proposing the existence of interacting parallel universes. This approach could explain quantum mechanics' bizarre phenomena and has potential implications for molecular dynamics and testing the existence of other worlds.
Researchers propose pilot-wave theory as an alternative to Copenhagen interpretation, inspired by a macroscopic fluidic system exhibiting quantum-like statistics. The system's chaotic dynamics lead to unpredictable particle behavior, challenging traditional notions of reality.
Researchers directly observe free-electron Landau states for the first time, revealing complex rotational dynamics that differ from classical predictions. The findings suggest that electron behavior in magnetic fields is more intricate than previously thought.
Researchers have developed an analytical approximation to study SQUID dynamics, enabling faster computation and evaluation of sensitivity in magnetometers. The technique, used for low-noise amplifiers and antennas, reduces simulation time to practically zero.
Researchers have recorded unprecedented observations of energy moving through diamond impurities, providing a starting point for new insights into critical electronic-state phenomena. The findings hold broad implications for magnetometry, quantum information, and sensing applications.