Articles tagged with Quantum States
Scientists have experimentally realized a stable exotic quantum state that resists mixing due to disorder, defying predictions of conventional quantum mechanics. The discovery could have implications for the development of robust quantum computers.
A research team at TU Wien developed a new method that combines strong measurements with weak measurements to reconstruct quantum states. This approach allows for higher precision and accuracy in determining the quantum state, reducing the need for post-processing.
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.
Researchers at ANU and UQ have developed a cloning method that produces higher-quality quantum clones than existing methods, with a success rate of about 5%. This breakthrough could enable ultra-secure encryption over long distances, overcoming the limitations of current quantum communication systems.
A breakthrough in quantum tomography has been achieved by RMIT researchers, demonstrating a new technique that significantly reduces resources and improves robustness against noise. This innovation enables the characterisation of large quantum states, a critical bottleneck in quantum information science.
Researchers have discovered that ring-shaped topological insulators display characteristics similar to those in spherical materials. The study reveals a zero-energy state on the surface of ring-shaped insulators and a coupling between charge carriers and curvature, leading to gauge fields and unique electron spin behavior.
A team of researchers has developed a method to precisely alter the quantum mechanical states of electrons in an array of quantum boxes. This allows for the investigation of interactions between various types of atoms and electrons, crucial for advancing quantum technologies.
A team of researchers has found evidence of a mysterious new state of matter, known as a quantum spin liquid, in a real two-dimensional material. The discovery matches theoretical models and could lead to the development of faster quantum computers.
Researchers at PTB have demonstrated non-destructive state detection technique for molecular ions, enabling novel spectroscopy methods with applications in chemistry and fundamental physics. The technique enables direct observation of quantum jumps in isolated molecules.
Researchers at NIST have teleported quantum information over 100km of optical fiber, four times farther than the previous record. The experiment confirmed that quantum communication is feasible over long distances in fiber.
Scientists from TU Wien and Free University of Berlin developed a quantum tomography method to measure and describe large quantum systems precisely with few measurements. This technique uses continuous matrix product states, which represent a vanishingly small fraction of all possible states but are physically important.
Researchers have developed an innovative cooling scheme for massive mechanical resonators, overcoming the limitation of quantum backaction. By utilizing destructive quantum interference in a cavity optomechanical system, they achieve ground state cooling beyond three orders of magnitude.
Researchers at University of California - Berkeley proved a fundamental relationship between energy and time, setting a 'quantum speed limit' on various processes. The discovery has implications for quantum computing, tunneling, and optical switching.
Researchers at Université de Genève have successfully teleported the quantum state of a photon to a crystal over 25 kilometers of optical fibre, surpassing their previous record of 6 kilometers. This experiment demonstrates that quantum state can exist independently of material composition.
Physicists successfully transmit a flash of light in a sensitive quantum state through the atmosphere, enabling secure quantum communication. The technology has potential advantages over current methods, including ability to transmit in sunlight and higher transmission rates.
Researchers developed a technique to control and observe individual electrons in nanoscale defects, enabling the creation of quantum-state snapshots. This breakthrough contributes to quantum information processing and could accelerate development of quantum computing devices.
Researchers will develop piezoelectric materials and nanometer-scale electromechanical devices to transfer information between quantum states and light using mechanical motion as an intermediary. The goal is to establish a technology that connects individual quantum states and enables the creation of quantum networks.
Scientists at Max-Planck Institute discover efficient way to brake molecular ion rotation, opening up new possibilities for laboratory-based astrochemistry. By cooling the rotational temperature using a tenuous gas, researchers can study chemical reactions in space more easily.
A UC Santa Barbara research team has demonstrated a nanomechanical transducer that provides strong and coherent coupling between microwave signals and optical photons. This breakthrough enables the translation of electrical quantum states to optical quantum states, paving the way for secure communication and quantum teleportation.
Researchers at ETH Zurich have developed a new control method for quantum systems, enabling precise steering through Hilbert spaces. This breakthrough has significant implications for the development of practical quantum computers.
Researchers successfully created interacting single-atom defects on a silicon surface, producing extended quantum states resembling artificial molecular orbitals. These findings represent an important step toward the fabrication of devices at the single-atom limit for applications such as quantum computing.
Physicists at the University of Vienna successfully transmitted quantum states between two islands in the Canary Islands, overcoming previous distances of just 97 km. The experiment uses active feed-forward protocol to enable reliable quantum teleportation over long distances.
Researchers at NIST have accelerated beryllium ions to 100 miles per hour and controlled their deceleration, demonstrating precision control of fast acceleration and sudden stops. This breakthrough enables faster transport of ions, a crucial step in quantum computing, reducing processing overhead and improving overall performance.
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 at the University of Calgary have made a significant breakthrough in quantum copying, demonstrating that original states can be perfectly recovered from imperfect copies. This achievement has far-reaching implications for quantum technology, including potential applications in precision measurement and sample analysis.
Researchers at Georgia Institute of Technology have successfully squeezed a property called the nematic tensor, describing rubidium atoms in Bose-Einstein condensates. This achievement improves measurement precision for atomic clocks and magnetometers, with potential applications to quantum information systems.
Researchers at the University of Pittsburgh have discovered a surprising topological semimetal through simple system studies. This new quantum state shares properties with a quantum Hall state but is driven by interaction rather than an applied magnetic field.
Researchers have developed a theory for a quantum cloning machine that can produce four approximate copies of an initial quantum state, overcoming previous limitations to two or three copies. This advancement has significant implications for message encryption systems and analyzing security using shared secret quantum keys.
Researchers from the University of Vienna have proven that the entanglement or separability of a quantum state depends on the perspective used to assess its status. By using mathematical density matrices, they showed how different factorisations can lead to entanglement or separability in complex physical systems.
Researchers at UC Santa Barbara and in China and Japan created NOON states by generating and storing microwave photons in two physically-separated cavities. The team demonstrated the ability to manipulate these states, showing that probing one cavity affects the other.
Researchers developed a special sequence of high-precision electromagnetic pulses to protect the arbitrary quantum state of a single spin. This breakthrough enables the use of nitrogen-vacancy centers in diamond as highly sensitive nanoscale magnetic sensors and potentially, qubits for larger-scale quantum information processing.
A team of Syracuse University physicists developed a theoretical model that explains how the Pauli exclusion principle can be violated, allowing for multiple electrons to occupy the same quantum state. The model may help explain matter behavior at black hole edges and contribute to a unified theory of quantum gravity.
Researchers at UC Santa Barbara have demonstrated electrically manipulating quantum states of electrons in diamond crystals, a step towards developing quantum computers. The achievement enables the creation of magnetic fields large enough to change an atomic-scale defect's quantum state in under one billionth of a second.
Researchers at Purdue University have created a hybrid molecule that can be intentionally manipulated, opening the door to quantum computing in semiconductors. This discovery enables control over the quantum state, a required step for building quantum computers.
Researchers at Ames Laboratory and Microsoft Station Q studied nitrogen-vacancy centers in diamond to understand decoherence, a process destroying quantum coherence. They discovered that environmental interference can be regulated by applying a moderate magnetic field, gaining insight into the decoherence process.
The NIST quantum key distribution system has achieved a record speed of 4 million bits per second (bps) over 1 kilometer of optical fiber, twice the previous record. The system uses single photons and operates at an error rate of only 3.6 percent, enabling highly secure key exchange.
Researchers at California Institute of Technology successfully teleported a quantum state of light from one end of an optical bench to the other. The process, known as quantum teleportation, enables information transmission at the speed of light without physical medium.