Articles tagged with Quantum Measurement
Researchers have developed multiprover interactive proofs that are resilient against entanglement, a breakthrough that has implications for cryptography and quantum physics. The findings provide insight into the complexity of computational problems and demonstrate the limitations of quantum information in cheating mechanisms.
Researchers at Kansas State University have identified a new bound state in atoms that can hold three identical atoms together, but repel two. This discovery sheds light on matter and its composition, and may lead to breakthroughs in experiments with ultracold atomic gases.
Researchers have developed an algorithm that can simulate particle collisions on a quantum computer, a feat currently beyond conventional supercomputers. This breakthrough could enable quantum computers to tackle challenging problems like breaking complex codes and studying the early universe.
Researchers have successfully realized and analyzed repulsive polarons, a new type of quasiparticle with modified properties. By controlling particle interactions, they found that these quasiparticles can exist for an almost ten times longer lifetime than previously thought.
The NIST simulator, built with 350 beryllium ions, has passed benchmarking tests and can study complex problems in material science that conventional computers cannot model. Scientists are now poised to explore high-temperature superconductors using the simulator's controlled quantum interactions.
A five-year MURI project will investigate three physical platforms for designing matter-light interaction used to generate entangled photons. The team aims to create large-scale systems that use entanglement for quantum communication and computing.
Researchers at Vienna University of Technology distinguish different sources of quantum uncertainty, including fundamental uncertainty rooted in the particle itself. The study confirms the validity of Heisenberg's Uncertainty Principle while revealing a more nuanced understanding of quantum mechanics.
Physicists at NIST have developed a method to manipulate atoms' internal states using lasers, revealing new interactions that could aid in designing materials for quantum computing. This technique allows researchers to simulate complicated systems and observe their behavior in slow motion.
Scientists at Vienna University of Technology have developed a new method to detect single atoms using ultra-thin glass fibers, allowing for precise measurement of tiny amounts of substances. The technique enables the control of quantum states without destroying them.
Researchers have observed four cesium states with roughly the same size, surprising theorists and suggesting a new kind of ultracold chemistry at work. The three-body parameter varies consistently across different atomic species, implying universal behavior.
Researchers have successfully demonstrated a quantum logic gate acting on four particles of light, enabling new approaches to quantum technologies. The device has the potential to improve secure communication and precision measurement, paving the way for more efficient computers and innovative applications.
Physicists at NIST successfully coupled two beryllium ions, exchanging quanta and demonstrating linked motion. The technique has the potential to simplify information processing in future quantum computers and simulations.
JILA scientists have eliminated collisions between atoms in an atomic clock by packing them closer together. This approach improves the performance of experimental atomic clocks made of thousands or tens of thousands of neutral atoms.
Researchers at NIST found that layering graphene on a substrate transforms its properties, creating hills and valleys that hinder electron mobility. The study uses a scanning tunneling microscope (STM) to investigate graphene's ideal properties in real-world conditions.
Researchers at NRL have discovered the nature of interactions between water-soluble semi-conductor quantum dots and dopamine, revealing a new way to detect changes in solution pH. The nano-scale sensor can visualize pH changes inside cells.
Researchers at NIST have created an optical Schrödinger's cat by detecting three photons simultaneously, a state predicted in quantum optics for years. This achievement enhances prospects for manipulating light to improve measurement techniques and contribute to quantum computing and communications.
Researchers at TUM achieve ten times stronger interaction than previous levels, opening new experimental options for quantum computing. The ultrastrong coupling creates a new unit of atom-photon pairs, challenging existing theories.
Researchers have simulated frustration in a smallest possible quantum system, revealing its relation to entanglement. The team created a fully controllable frustrated magnetic network with three spins, allowing them to manipulate interactions using laser beams.
Researchers at Ludwig-Maximilians-Universität München create an artificial crystal of light to observe exotic multiparticle interactions, revealing complex quantum dynamics and periodic collapses and revivals of matter wave fields. The study demonstrates the existence of three-body collisions involving multiple atoms simultaneously.
Researchers at JILA have demonstrated a new tool for controlling ultracold gases and ultracold chemistry by applying small electric fields. The study shows that the electric field spurs a dramatic increase in chemical reactions, with molecules reacting faster when approaching each other head-to-tail parallel to the applied field.
Researchers at UC Berkeley and Lawrence Berkeley National Laboratory detected a large effect of the weak interaction in Ytterbium, about 100 times bigger than seen in Cesium. This finding opens up new opportunities for sensitive searches for new physics using tabletop atomic physics techniques.
A team of physicists from Innsbruck, Austria, have proven that it is not possible to explain quantum phenomena in non-contextual terms. They used techniques designed for building a quantum computer and performed a series of measurements on a pair of laser-cooled calcium ions.
Giant Rydberg molecules are formed by two interacting atoms due to fluctuations in electron orbitals, allowing for electric field manipulation and control over molecular properties. The discovery brings researchers closer to developing new quantum devices that combine isolated atomic systems with advances in microelectronics.
Physicists use ultracold atoms in optical lattices to simulate complex materials like high-temperature superconductors. They successfully detect the Mott insulator, a state of strong electronic interactions, and confirm a key theoretical model.
The EuroQUASAR programme will develop next-generation quantum standards for precise optical clocks and inertial sensors. Researchers, including Professor Markus Arndt, are working on new methods for quantum interferometry to measure molecular details such as mass and geometry.
Researchers found that frequent temperature measurements can alter the behavior of quantum systems, allowing them to heat up when hotter than the bath and cool down when colder. This effect is due to decoupling from the heat bath during measurement, introducing energy into the system and altering its temperature.
Physicists at NIST induce thousands of atoms to swap spins, creating logical connections for quantum computing. The demonstration advances prospects for using neutral atoms as qubits, which could provide extraordinary power for applications like encryption code-breaking.
Researchers from Michigan State and Central Michigan universities develop a new approach to modeling atomic nuclei, reducing computational complexity by focusing on correlations between particles. This breakthrough enables more accurate predictions for the structure of heavy atomic nuclei.
Professor Wootters was awarded the International Quantum Communications Award and the APS Prize to a Faculty Member for Research in an Undergraduate Institution. His research on quantum teleportation has been widely cited, and he is recognized for his engagement of undergraduate students in physics research.
Researchers have developed a novel simulator that can recreate quantum behavior in atoms and particles, enabling control over individual parts of a quantum system. This breakthrough is crucial for developing powerful quantum computers that can perform calculations billions of times faster than normal computers.
Yuzbashyan will use the funding to attend technical conferences and collaborate with specialists globally, aiming to promote new technologies like quantum computing and superconductivity. He plans to bring researchers from Great Britain to Rutgers and fund graduate research assistant positions.
Scientists have developed a way to measure protein flexibility using lasers, revealing a dynamic process in antibody-antigen recognition. The technique allows for the detection of rapid molecular motions, suggesting that antigen recognition may not be a simple lock-and-key mechanism.