Researchers at Joint Quantum Institute demonstrate a new way to distinguish between quantum scrambling and true information loss using a small quantum computer. They achieved an accuracy of 80% in correctly diagnosing scrambling with seven atomic ions.
The new module combines proven techniques with advances in hardware and software to run arbitrary algorithms on five qubits. It enables the flexibility to test the module on a variety of problems, bringing practical quantum computing closer to reality.
Builders of future superconducting quantum computers may learn from semiconductors to simplify operation and improve qubits. Researchers found an efficient implementation using novel control approaches, eliminating costly overheads for control and reducing gate error rates.
Researchers at JQI develop interface between photons and single electrons, enabling fast interaction and scalable integration on a chip. This breakthrough advances quantum networks and enables entanglement distribution, secret communication, and complex quantum devices.
Scientists at Joint Quantum Institute successfully control orbital angular momentum of neutron waves, a fundamental property of matter waves. The achievement uses a counterintuitive property of neutrons to twist the phase of their wavefunction, enabling potential applications in neutron imaging and quantum information processing.
Researchers at JQI have discovered special wavelengths, known as 'magic wavelengths', that can trap and excite Rydberg atoms without disturbing them. This breakthrough enables the creation of qubits and interaction of atoms in a useful regime.
Researchers have developed a new approach to sharpen nanoscale microscopy by precisely determining the light source's location, overcoming diffraction limit challenges. This innovation enables super-resolution imaging with accuracy, correcting for image-dipole distortions and improving spatial resolution.
Scientists at the Joint Quantum Institute use thermal light and cheap detectors to achieve sub-wavelength imaging, overcoming classical optical limitations. They observe an interference pattern with fringes as narrow as 30 nm, pushing the boundaries of extreme quantum coherence.
Scientists at the Cavendish Laboratory and Joint Quantum Institute create a new type of qubit control that leverages its surroundings to maintain quantum integrity. By harnessing the environment's magnetic field, they enable efficient manipulation and readout of quantum states, paving the way for quantum computing advancements.
Researchers have discovered a novel form of superconductivity in two-dimensional electron liquids, characterized by the presence of quantum point contacts. These tiny channels enable the flow of superconducting currents, but with a twist: the spin degree of freedom is broken, allowing for new types of electron transport.
Researchers at Joint Quantum Institute develop universal theory for Efimov states, enabling prediction of chemical processes involving three or more atoms. The new theory successfully incorporates short-distance regime and van der Waals force, predicting a series of Efimov states with varying binding energies.
Scientists at the Joint Quantum Institute have successfully demonstrated on-chip topological light, showcasing a robust and consistent method for photonic signal processing. The breakthrough enables the development of microscale delay lines with low energy loss, opening up new possibilities for quantum information processing.
Physicists at the Joint Quantum Institute have developed an MRI-like diagnostic technique for studying large ensembles of interacting quantum spins. The method reveals spin-spin interaction strengths and energies of various configurations, offering insights into complex phenomena like magnetism.
A new theoretical study by Marianna Safronova and colleagues identifies 10 highly charged ions, including samarium-14+ and neodymium-10+, suitable for atomic timekeeping and quantum information schemes. The researchers provide estimates of ion properties needed for experiments, enabling the development of more accurate clocks and qubits.
Theorists propose using a bottom-up approach to create hybrid quantum devices by placing superconducting regions within silicon crystals. This could combine the benefits of both silicon spin qubits and superconducting circuits, enabling more robust qubit designs.
Researchers at Joint Quantum Institute investigate entangled beams in fast-light materials, where anomalous dispersion causes faster-than-light-like behavior. The findings reveal potential applications in ultrafast data processing and secure communication.
The Joint Quantum Institute theorists have made detailed calculations of the dynamics of a positronium Bose-Einstein condensate. They report that above a critical density, collision processes destroy the internal coherence of the gas, posing challenges for the operation of a gamma-ray laser.
A new approach converts weak microwave signals into visible light for clean detection and reduces noise by a thousand times. This all-optical detection method is the first to achieve this at room temperature.
Researchers at JQI observe hysteresis in an ultracold atomic gas, a phenomenon crucial for electronics. By controlling the rotation of a quantum fluid, they create a stable two-velocity state that has implications for building practical atomtronic devices.
The study reveals a decrease in global energy inequality, with the distribution of per-capita energy consumption approaching an exponential law. As nations like China move up the curve, energy consumption becomes increasingly concentrated among high-consuming nations.
Researchers at Joint Quantum Institute report direct observation of topological effects for light in two dimensions, creating ultrastable quantum 'playgrounds.' Photonic edge states exhibit persistent flow and near immunity against defects, similar to quantum Hall effect for electrons.
Researchers at JQI establish a new record for heralding efficiency, detecting entangled photons with 84% accuracy. This achievement paves the way for tighter loopholes over quantum reality and potentially random number generation.
Researchers explore ion traps as a promising architecture for constructing a quantum computer, leveraging qubits' coherence time and protection from ambient disturbances. The development of micro-fabricated devices and cryogenic cooling techniques aims to push the limits of pressure and storage capacity.
Scientists use single quantum dots to excite plasmons in metal wires, creating precise images of electric field intensity with 12-nm accuracy. This technique enables new hybrid electronics by combining photonics and electronics for efficient sensing and processing.
A new JQI photodetector uses an adaptive network of detectors with feedback to read quantum information with minimal uncertainty. By combining multiple stages and using phase reference waves, the system can beat the standard quantum limit for quaternary encoding.
Researchers found that blackbody radiation shifts caused by surrounding chamber temperature can impose limits on atomic clock precision. The study, led by Charles Clark and Marianna Safronova, explores how ytterbium atoms are affected by this faint form of influence, crucial for future clock recalibrations.
Researchers successfully excite a spin qubit using a resonant cavity, addressing challenges of quantum processing and decoherence. This breakthrough enables the transportation of quantum information over 'bus' conduits, similar to digital information in conventional computers.
Qubits can successfully exist in topological superconductor materials despite impurities and strong interactions. Majorana particles provide coherence-protection programs for qubits.
Researchers have created a framework for stabilizing magnetic monopoles, which could lead to breakthroughs in data storage. The discovery was made possible by studying spin ice materials at low temperatures, where frustration among magnetic atoms leads to the formation of unpaired poles.
Researchers examine relationship between disorder and quantum coherence in materials, finding that a pinch of disorder is good but too much can destroy coherence. The Joint Quantum Institute experiment uses laser beams to introduce slight disorder into rubidium atoms, revealing how it affects their behavior.
Researchers at Joint Quantum Institute store and replay two separate images, a feat of cinematography, using a room-temperature vapor of atoms. The new storage process has great promise for quantum information and may lead to the development of a random access memory for continuous variable quantum information.
The JQI switch can steer a beam of light from one direction to another in 120 picoseconds using only 140 photons, requiring minimal power. This achievement marks a significant step toward creating ultrafast and low-energy on-chip signal routers.
Research by physics professor Victor Yakovenko links income inequality with bursting financial bubbles. He models income distribution using statistical physics, finding a long tail in the upper 3% of incomes that correlates with investment downturns.
Researchers discover several new phases of atomtronic matter, including a 'bond-order solid' with strong long-range dipole interactions. These phases are associated with the controlled movement of ultracold atoms in an optical lattice and have potential applications for data encoding and quantum computing.
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 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.