A quantum gas that refuses to heat
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.
Quantum Decoherence
Articles tagged with Quantum Decoherence
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Gold clusters show promise as scalable options for quantum computers, sensors
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.
New quantum record: Transmon qubit coherence reaches millisecond threshold
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.
Scientists discover new way to keep quantum spins coherent for longer
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.
Deep in the Mediterranean, in search of quantum gravity
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.
How ‘clean’ does a quantum computing test facility need to be? PNNL scientists show the way
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 create entangled quantum magnets with protected quantum excitations
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.
Advancement in particle physics: New encoding mechanism unveiled
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.
Spin squeezing for all
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.
Unconventional interface superconductor could benefit quantum computing
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.
Enhancing quantum technology performance tenfold
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.
Helping qubits stay in sync
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.
Rice research opens new arena to study quantum interactions
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.
Solid-state qubits: Forget about being clean, embrace mess
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.
New strategy reveals ‘full chemical complexity’ of quantum 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.
Novel hardware approach offers new quantum-computing paradigm
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.
Understanding the tantalizing benefits of tantalum for improved quantum processors
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.
Scepticism about Microsoft results
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 take a step towards turning interactions that normally ruin quantum information into a way of protecting it
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.
UChicago researcher awarded NSF grant to manufacture advanced quantum materials
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.
Anti-butterfly effect enables new benchmarking of quantum-computer performance
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.
Rice lab’s quantum simulator delivers new insight
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.
Breakthrough in quantum universal gate sets: A high-fidelity iToffoli gate
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.
Study points to physical principles that underlie quantum Darwinism
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.
How a physicist aims to reduce the noise in quantum computing
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.
NSF funds Rice effort to measure, preserve quantum entanglement
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.
Army scientists take new spin on quantum research
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.
Longest microwave quantum link
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, IKBFU physicist: 'Can quantum effects occur at mega-scale?'
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.
Complex energies, quantum symmetries
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.
Argonne researchers develop new method to reduce quantum noise
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.
USC scientists find a way to enhance the performance of quantum computers
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.
Seeing the quantum future... literally
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.
Surprising neutrino decoherence inside supernovae
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.
Dartmouth-led team devises new technique to probe 'noise' in quantum computing
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.
Scientists use 'voting' and 'penalties' to overcome errors in quantum optimization
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.
Quantum particles find safety in numbers
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.
Large-scale quantum chip validated
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.
Quantum cats are hard to see
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.
Experiments by USC scientist make a breakthrough in quantum computing
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.
Discovery may overcome obstacle for quantum computing
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.
Search for the bridge to the quantum world
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 featured in Optics Letters
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.