Articles tagged with Quantum Decoherence
An underground experiment has tested a theory linking gravity to quantum decoherence, ruling out a pioneering model. The Gran Sasso National Laboratory provided an ideal environment to detect subtle fluctuations predicted by the theory, but no signal was detected, shedding light on the interplay between gravity and quantum mechanics.
SEAS researchers demonstrate a unique 'all-mechanical coherence protection' of a silicon-vacancy spin in diamond using continuous mechanical driving fields made of phonons. This approach extends the spin coherence time by roughly a factor of three, establishing the potential for compact, sound-based quantum networks on chips.
Researchers at Max Planck Institute develop technique to interrogate molecules on surfaces with spectroscopic precision, reaching the ultimate quantum limit. This breakthrough enables study of molecule-surface interactions and molecular quantum technologies.
Researchers at Goethe University used X-ray radiation to determine the spatial structure of formic acid, finding that its atoms oscillate slightly back and forth. This 'quantum trembling' causes the molecule to lose its symmetry and become effectively three-dimensional at almost every moment.
Giant superatoms combine two quantum-mechanical constructs to suppress decoherence and create entanglement, opening opportunities for scalable and reliable quantum systems. This breakthrough enables quantum information to be protected, controlled, and distributed in new ways.
Researchers observe 'many-body dynamical localization' where a quantum system resists thermalization despite continuous driving. The phenomenon is crucial for building better quantum devices and simulators.
Researchers at Penn State have demonstrated how gold nanoclusters can mimic the spin properties of trapped atomic ions, allowing for scalability in quantum applications. The clusters can be easily synthesized in large quantities and exhibit unique Rydberg-like spin-polarized states that mimic superpositions.
Physicists from Aalto University have measured a transmon qubit coherence time of over a millisecond, surpassing previous records and enabling more complex quantum computations. This breakthrough marks a significant step towards noiseless quantum computing.
Researchers at Hebrew University and Cornell University developed a way to suppress spin decoherence in alkali-metal gases, reducing spin relaxation rates by an order of magnitude. This breakthrough enables more stable and precise quantum devices, such as atomic clocks and magnetometry.
A study published in JCAP has established upper limits on the strength of quantum gravity effects on neutrino oscillations, providing valuable insights into the long-sought theory. The results show no signs of decoherence, a phenomenon that could be a key indicator of quantum gravity's presence.
A team of scientists has identified key sources of radiation that can interfere with superconducting qubits, leading to errors in quantum computing. By developing effective shielding measures, they aim to improve coherence times and pave the way for practical quantum computing.
Researchers have introduced a novel particle encoding mechanism that addresses longstanding issues in particle identification, enabling precise digital representation of complex particles. This new method is adaptable for future discoveries and has the potential to unlock new frontiers in particle physics.
Scientists at Aalto University and Institute of Physics CAS built an artificial quantum material with topological quantum magnetism, featuring a new state of matter. The researchers demonstrated the highest-order topological quantum magnet, which could provide substantial protection against decoherence in quantum technology.
Researchers have successfully achieved spin squeezing in a more accessible way, enabling precise measurements with quantum-enhanced metrology. This breakthrough may lead to new portable sensors for biomedical imaging and atomic clocks.
Researchers developed a new superconductor material that uses a delocalized state of an electron to carry quantum information. The material could be used to create low-loss microwave resonators for quantum computing, which is critical for reducing decoherence and increasing the stability of qubits.
Researchers have developed a novel method to significantly enhance quantum technology performance by leveraging cross-correlation of two noise sources. This approach extends coherence time, improves control fidelity, and increases sensitivity for high-frequency sensing.
Researchers at Washington University in St. Louis have developed a new technique to enhance quantum entanglement stability in qubits. This breakthrough addresses the challenges of maintaining coherence and reliability in quantum systems.
Researchers at Rice University have developed a new experimental technique that preserves quantum coherence in ultracold molecules for a significantly longer time. By using a specific wavelength of light, the 'magic trap' delays the onset of decoherence, allowing scientists to study fundamental questions about interacting quantum matter.
Researchers at Paul Scherrer Institute created solid-state qubits from rare-earth ions in a crystal, showing that long coherences can exist in cluttered environments. The approach uses strongly interacting pairs of ions to form qubits, which are shielded from the environment and protected from decoherence.
Researchers have developed a method to quantify the spectral density of molecules in solvent, allowing for the design of molecules with specific quantum coherence properties. This breakthrough enables the mapping of decoherence pathways in molecules, connecting chemical structure to quantum decoherence.
Theoretical physicists at Los Alamos National Laboratory have developed a new quantum computing paradigm that uses natural quantum interactions to process real-world problems faster than classical computers. The approach eliminates many challenging requirements for quantum hardware.
Researchers used x-ray photoelectron spectroscopy to study the chemical profile of tantalum surface oxides, revealing different kinds of tantalum oxides at the surface. This discovery prompted a new set of questions on modifying interfaces to improve device performance and minimizing loss.
Researchers at the University of Basel have questioned Microsoft's claims of detecting Majorana particles, suggesting alternative explanations for the anomaly and superconducting properties detected in experiments. The team's calculations show that disorder in the nanowire could be responsible for the observed effects.
Researchers developed a technique to predict how quantum systems behave when connected to their environment, turning a problem into a solution. The approach combines techniques from quantum many-body physics and non-Hermitian quantum physics, providing a crucial tool for real-world applications of quantum technology.
Assistant Professor Shuolong Yang and his team aim to develop a scalable process for creating topological quantum materials, which resist decoherence. By using a novel technique inspired by woodblock printing, they hope to create iron selenium tellurium, a potential superconductor for quantum computing.
Researchers developed a protocol to distinguish information scrambling from decoherence in quantum systems. By evolving a system forward and backward through time, they can measure the preservation of information scrambling and detect losses due to decoherence.
Physicists at Rice University have created a quantum simulator that reveals the behavior of electrons in one-dimensional wires, shedding light on spin-charge separation. The study's findings have implications for quantum computing and electronics with atom-scale wires.
The Berkeley Lab team has demonstrated a three-qubit native quantum gate, the iToffoli gate, with high fidelity of 98.26%. This breakthrough enables universal quantum computing and reduces circuit running times.
The study investigates the role of physical principles in quantum Darwinism, finding that it relies on non-classical features, specifically entanglement, to emerge via natural selection. The researchers employed generalized probabilistic theories to analyze and compare different physical theories.
Behunin's project targets challenges in practical quantum computing by controlling noise and its impact on qubits. By manipulating sound waves, he hopes to quiet the noise that corrupts information stored in quantum computers.
Physicist Guido Pagano has won a prestigious CAREER award from the National Science Foundation (NSF) to study quantum entanglement and develop new error-correcting tools for quantum computation. He aims to understand how measurement affects entangled systems and create tools to correct errors caused by quantum decoherence.
Researchers have made breakthroughs in understanding dispersion's impact on entangled photon systems, allowing for more reliable communication networks. This discovery could enable faster data transmission rates and secure secret sharing.
Researchers at ETH Zurich create a five-metre long microwave quantum link, demonstrating the feasibility of quantum local networks. The breakthrough could enable the development of powerful quantum computers by connecting smaller devices in a cluster.
Artyom Yurov's research suggests the Universe may have quantum properties due to decoherence theory. The phenomenon states objects exist in multiple places until interacting with their environment, causing 'collapse'. This theory challenges traditional understanding of large-scale quantum effects.
Scientists at Washington University in St. Louis realize a parity-time (PT) symmetric quantum system, allowing them to observe previously unexplored phenomena. The work demonstrates the potential applications of such systems to quantum computing.
Researchers have developed a new technique to recover lost information in quantum systems by repeating experiments with slightly different noise characteristics. This method effectively reduces quantum noise without the need for additional hardware.
Researchers at USC have successfully implemented a method called dynamical decoupling to suppress erroneous calculations and increase the fidelity of results in quantum computers. The technique, which uses staccato bursts of energy pulses to offset ambient disturbances, improved final fidelity by threefold in IBM's 16-qubit QX5 computer.
Researchers from the University of Sydney have demonstrated a technique to predict and prevent the randomization of quantum systems, or decoherence, which destroys their useful quantum character. This achievement could help bring powerful quantum technology closer to reality.
A new study reveals that neutrinos produced in the core of a supernova are highly localized compared to all other known sources. Theoretical wave packet size is irrelevant in simpler cases, providing a more solid foundation for standard neutrino behavior theories.
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.
A team of scientists from USC developed a strategy to link quantum bits together into voting blocks, significantly boosting accuracy when the D-Wave quantum processor is led astray by noise. This method results in at least a five-fold increase in probability of reaching the correct answer on large problems.
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.
The USC-Lockheed Martin Quantum Computing Center has successfully demonstrated the functionality of a large-scale quantum optimization processor, with 128 qubits. The team verified that the device operates as a quantum processor, using quantum mechanics to solve optimization calculations.
Researchers demonstrate why quantum mechanics' physical effects are rarely seen in daily life. They found that precisely counting photons becomes increasingly difficult as the number of photons increases.
Theoretical work at UBC and experiments at UC Santa Barbara led to a breakthrough in predicting and controlling environmental decoherence, a major hurdle for quantum computing. The findings suggest that high magnetic fields can suppress decoherence rates, making magnetic molecules a promising candidate for quantum computing hardware.
Researchers developed a quantum computing system that resists 'quantum bug' decoherence, allowing qubits to last up to 500 microseconds. By using high magnetic fields and molecular magnets, they suppressed decoherence and increased signal detection in qubits.
Physicists have proposed a transition from quantum to classical world through decoherence, an evolutionary process similar to Charles Darwin's natural selection. The research uses advanced scanning gate microscopy to measure scars in quantum dots, providing insight into the bridge between the two realms.
Malinovskaya's research aims to control coherence and overcome current barriers in quantum computing, molecular selective bio-imaging, and Raman microscopy. By using femtosecond, chirped laser pulse trains, she can selectively prepare target molecules in the excited state and restore coherence periodically.