Articles tagged with Quantum Superposition
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Researchers develop quantum RAM that models complex problems with unprecedented amounts of data, using a 'quantum hard drive' smaller than conventional simulations require. This breakthrough achieves significant improvements in efficiency, paving the way for advancements in complex simulations and real-world applications.
A Polish-British team has developed a compact and efficient converter that modifies individual photons' properties, enabling the construction of complex quantum computers. The device achieves high conversion efficiency and preserves quantum superposition.
Researchers have developed a formula to understand where quantum objects land when transmitted, offering insights for controlling open quantum systems. The formula suggests that 'rain gutters' and 'gates' can be engineered to manipulate quantum objects, either after they land or during their flow.
The University of New Mexico's CQuIC will receive a five-year, $2.2 million grant from the National Science Foundation to delve deeper into quantum information and computing. This award solidifies CQuIC as a leading research hub in theoretical physics, enabling researchers to make new progress toward quantum computing.
Researchers used a novel quantum Monte Carlo technique to study the Rabi model's accuracy at the quantum scale. They found dramatic consequences for strongly coupled light-atom systems, emphasizing the need to account for non-conserved excitations.
Australian engineers have created a new quantum bit called the 'dressed qubit' which retains quantum information for much longer than previously achieved, opening up new avenues to build and operate powerful quantum computers. The result is a 10-fold improvement in the time span during which quantum superposition can be preserved.
Scientists have found that neutrinos can exist in a state of superposition, with no definite flavor or identity, while traveling hundreds of miles. This phenomenon is unexpected under classical theories and confirms the reach of quantum mechanics even at large scales.
Scientists have successfully induced quantum coherence in a large number of photons, allowing for complex quantum states to be manipulated and applications for computation and communication to be explored. The findings represent a significant breakthrough in achieving quantum coherence at a macroscopic scale.
The Jayich Lab developed a quantum sensor that captures nanoscale images with high spatial resolution and sensitivity. This technology operates from room temperature, allowing for the study of various phases of matter and phase transitions.
A team of researchers has built a chip that generates multiple frequencies from a robust quantum system producing time-bin entangled photons. This feature can enable multiplexed and multi-channel quantum communications and increased quantum computation information capacity.
A new technique to probe and control environmental noise in quantum computing has been developed by a Dartmouth-led team. The method, called quantum noise spectroscopy, uses a quantum system as a probe of its own environment to extract information about the noise.
Researchers at MIT describe a feedback-control system that preserves quantum superposition in nitrogen-vacancy centers, enabling reliable quantum computing. The system uses entangled spins of nitrogen and NV center atoms to correct errors during computations.
Researchers at Purdue University and Tsinghua University propose a novel method to teleport the internal quantum state and center-of-mass motion state of a microorganism. This breakthrough has significant implications for potential future applications in quantum information and organism teleportation.
A team of researchers has been awarded a grant to develop a new ion technology for tackling quantum computing's error control challenge. The goal is to build modular super-qubits that can correct errors and scale up quantum information applications.
Dr Jonathan Pritchard has secured a prestigious fellowship to support his research into the direct exploitation of quantum phenomena. His project aims to develop a hybrid device combining atoms and superconducting circuits for scalable quantum networking, with potential applications in computing, finance, and more.
Researchers have successfully implemented superposition of quantum gates, allowing for increased efficiency in quantum computations. This breakthrough could pave the way for faster quantum computers.
Researchers have discovered that time dilation caused by gravity can explain the suppression of quantum behavior in larger objects, such as molecules and dust particles. This effect destroys quantum superposition and forces these objects to behave classically.
Researchers have developed a new quantum error correction code that can correct errors afflicting a specified fraction of qubits, not just the square root of their number. This protocol requires little measure of quantum states and can correct virtually all errors in quantum memory.
Researchers have successfully controlled quantum states in a silicon wafer, achieving a record-breaking quantum on/off switching time of about 1 millionth of a millionth of a second. This breakthrough could lead to the creation of fast quantum silicon chips and ultra-sensitive bio-medical sensors.
A new analysis found that highly connected databases don't always support fastest quantum computing, with low connectivity yielding fast search in some cases. Researchers used the properties of superposition to model a quantum particle's movement through a database, demonstrating the unexpected influence of data structure on search speed.
Physicist Kater Murch's experiment combines information about a quantum system's evolution before and after a target time to narrow the odds of correctly guessing its state. The 'hindsight' prediction is 90% accurate, suggesting that time runs both backward and forward in the quantum world.
Researchers at the University of Bonn have shown that cesium atoms can indeed take two paths at the same time, contradicting the macro-realistic view. The team's experiment uses optical tweezers to manipulate a single Caesium atom and measures its final position indirectly.
Researchers have designed a new experiment to test the foundations of quantum mechanics at large scales. They plan to achieve macroscopic high-mass superpositions by using a levitated silicon nanoparticle in an interferometer setup.
Scientists propose a new quantum computer architecture based on microscopic defects in diamond, which could lead to the development of reliable quantum computers. The architecture has great potential for miniaturization and mass production, similar to how transistors were miniaturized in classical computer science.
Physicists at NIST demonstrated a pas de deux of atomic ions that combines precise control with entangled states. The ion duet enables scalable simulation and computing, with potential applications in logic operations and precision measurement tools.
Scientists from Chapman University and several other institutions develop an experiment to track quantum trajectories, comparing them to a recent theory predicting the most likely path. The results show good agreement between theory and experiment, verifying the theory and opening the way for active quantum control techniques.
Researchers from the University of Rochester and others have developed a theory to predict the most likely path a system will take between two quantum states. By tracking millions of quantum trajectories, they were able to demonstrate good agreement between theory and experiment.
Researchers use a superconducting quantum device to record and analyze the paths a quantum system takes between two states, revealing the existence of a quantum equivalent of classical 'least action' path. The findings have implications for controlling biological and chemical systems using lasers.
Researchers at Chapman University and Vienna University of Technology successfully separated a neutron from its magnetic field, defying classical notions of particle properties. The experiment utilized neutron interferometry to isolate the particle's spin from its direction of motion.
Researchers successfully separated a neutron's magnetic moment from its particle, observing the first experimental evidence of the 'Cheshire Cat' paradox. This technique can be applied to any property of any quantum object, improving high precision measurements.
Researchers have successfully demonstrated a photonic router – a quantum device based on an atom that enables routing of single photons by single photons. This achievement brings closer the goal of building quantum computers, which rely on superposition and photonic communication to process data in parallel.
Researchers at Saarland University developed a new calibration technique called Ad-HOC that reduces the calibration error rate to below 0.1% and speeds up the process from six hours to five minutes.
Scientists create optical nanofibers to trap atoms in a fragile state, addressing the challenge of decoherence in quantum computers. The new method improves transmission loss by two orders of magnitude, paving the way for hybrid quantum processors.
Researchers at TU Vienna develop a new method to utilize quantum mechanical vibrations for high precision measurements in complex multi-particle systems. They successfully control hundreds of Rubidium atoms in an ultracold Bose-Einstein condensate, enabling the use of collective motional states for interferometric measurements.
Researchers eliminate a potential speed bump in quantum computing by showing that local symmetries are sufficient for fast searches. Global symmetry is not required for the quantum speedup, contrary to intuition.
Researchers at Caltech found a way to sidestep quantum 'noise' that limits precision of ultrasensitive position measurements, enabling detection and avoidance of quantum fluctuations. The study provides a solution for rerouting some of the noise away from the measurement, allowing for increased sensitivity without compromising accuracy.
A new 5-qubit array demonstrates improved reliability in quantum computing, a crucial step towards building a functional quantum computer. The team's findings are based on theoretical work by Austin Fowler and the surface code architecture, which provides a way to control qubits properly.
Physicists at Harvard University have successfully created quantum switches that can be turned on and off using a single photon. This technological achievement could lead to the creation of highly secure quantum networks, enabling perfectly secure communications over long distances.
Recent studies have explored quantum superposition and its potential applications, including quantum computing and optical clocks. Researchers have developed advanced techniques to manipulate individual quantum systems, such as ion traps and microwave cavities, allowing for the investigation of fundamental quantum mechanics.
Researchers from Universitat Autonoma de Barcelona have achieved a groundbreaking quantum entanglement with a minimum of 103 dimensions using only two particles. This breakthrough enables the creation of highly complex states that can facilitate experimental development of quantum computers and enhance cryptography security.
A colloquium paper reviews selected issues with quantum theory, clarifying the distinction between mathematical tools and physical phenomena. The author debunks myths surrounding Schrödinger's cat state, measurement problem, and other misconceptions.
Researchers have achieved a world record by storing a fragile quantum state at room temperature for 39 minutes, overcoming a key barrier towards building ultrafast quantum computers. This breakthrough could lead to long-term coherent information storage and potential applications in ultra-secure authentication devices.
A team has achieved a world record 39 minutes for a fragile quantum state to survive at room temperature, paving the way for ultrafast quantum computers. The discovery demonstrates robust and long-lived qubits that could enable efficient quantum calculations.
Researchers at Vienna University of Technology develop a single-atom light switch that can redirect light between two fibre optic cables. The system utilizes a Rubidium atom to act as a switch, allowing for the manipulation of light and enabling quantum phenomena for information and communication technology.
Researchers have discovered that copper phthalocyanine can remain in 'superposition' states, a key characteristic of quantum computing, for surprisingly long times. This could lead to significant advancements in quantum technologies, including data storage and manipulation.
A new study by Ludwig-Maximilians-Universität München researchers has uncovered a novel effect that can stabilize quantum systems against decoherence. In principle, this effect offers a means to protect the integrity of quantum information and brings practical quantum computing closer to reality.
Researchers at Vienna University of Technology study a large cloud of atoms and find that disorder spreads with a certain velocity, leading to the loss of quantum properties. As the disorder grows, a temperature emerges in the system, mirroring classical behavior.
The proposed system combines ultracold trapped ions and fermionic atoms to emulate solid state physics, including the Peierls transition and phonon-mediated interactions. This hybrid system may simulate complex quantum systems beyond current computing power.
Physicists at the University of Calgary successfully tested quantum mechanics on a large scale, creating a system in two substantially different states at once. This breakthrough demonstrates the application of quantum superposition principles to everyday macro objects.
Researchers Corsin Pfister and Stephanie Wehner discovered a new principle that rules out discrete theories incompatible with quantum physics. The principle assumes that measuring a system yields no information implies the system has not been disturbed.
University of Chicago researchers engineer small molecules that support long-lived quantum coherences, mimicking photosynthetic systems. These findings demonstrate the feasibility of recreating quantum mechanics in man-made compounds.
Weizmann Institute researchers found that measuring a single atom's spin can collapse its superposition into one state. By adjusting the polarization of the emitted photon, they demonstrate that observers can influence the spin collapse, suggesting an 'action-at-a-distance' effect.
Dr Hendrik Ulbricht's team will explore the theoretical possibility of conducting experiments to discover whether there is a limit to quantum theory or not. They aim to generate a quantum superposition state for nanoparticles using matter wave interferometry.
Researchers at the University of Vienna have developed a novel way to manipulate massive particles using nanosecond long flashes of laser light, enabling precise measurements of small forces and fields. This breakthrough allows for the investigation of quantum wave nature in both single molecules and clusters of molecules.
Researchers from the University of Vienna and Université Libre de Bruxelles have shown that in quantum mechanics, a single event can be both a cause and an effect of another one. This challenges our understanding of causality and has far-reaching implications for foundations of quantum mechanics, quantum gravity, and quantum computing.
Researchers at the University of Miami introduced a breakthrough theory that explains high-temperature superconductivity. The team found that specific quantum effects can generate superpositions of individual states, providing an effective glue to repair the system and allow superconducting behavior to emerge.
Researchers discovered a new way for quantum computers to simulate stochastic processes, which are used to model phenomena like stock market movements and gas diffusion. This finding suggests that quantum theory might not yet be optimized, leaving room for further exploration of a deeper theory.
Researchers at the Joint Quantum Institute create more complicated collisions between atoms using laser light, enabling the observation of high-angular-momentum scattering in long-lived atomic Bose-Einstein condensates. This innovation may facilitate the creation of exotic quantum states for practical applications like quantum computing.
Researchers at the University of Vienna aim to measure general relativistic time on a quantum scale by exploiting quantum interference and complementarity. They consider a single clock in a superposition of two locations, one closer and one further away from Earth, where gravity's effects are different.
A new scheme, 'coherent photon conversion', offers a method for coherent conversion between different photon states using a strong laser field. This approach promises to solve open challenges in optical quantum computation and lead to the development of a nonlinear optical quantum computer.