In quantum sensing, atomic-scale quantum systems are used to measure electromagnetic fields, as well as properties like rotation, acceleration, and distance, far more precisely than classical sensors can.
Tag: Qubits
New qubit circuit enables quantum operations with higher accuracy
In the future, quantum computers may be able to solve problems that are far too complex for today’s most powerful supercomputers. To realize this promise, quantum versions of error correction codes must be able to account for computational errors faster than they occur.
Quantifying Qudits: New Measurements Provide a Glimpse of the Quantum Future
The qubits that make up quantum computers have a lesser-known cousin called qudits. Qudits can carry more information and are more resistant to the noise that can cause qubits to lose information. However, qudits have historically been difficult for scientists to measure and modify.
Quantum Error Correction Moves Beyond Breakeven
Quantum systems decohere due to unwanted interactions with their environment. Correcting for the effects of decoherence is a major challenge for quantum information systems. Previous error correction methods have not kept up with decoherence.
Qubits put new spin on magnetism: boosting applications of quantum computers
Research using a quantum computer as the physical platform for quantum experiments has found a way to design and characterize tailor-made magnetic objects using quantum bits, or qubits. That opens up a new approach to develop new materials and robust quantum computing.
Department of Energy Announces $9.1 Million for Research on Quantum Information Science and Nuclear Physics
Today, the U.S. Department of Energy (DOE) announced $9.1 million in funding for 13 projects in Quantum Information Science (QIS) with relevance to nuclear physics. Nuclear physics research seeks to discover, explore, and understand all forms of nuclear matter that can exist in the universe – from the subatomic structure of nucleons, to exploding stars, to the emergence of the quark-gluon plasma seconds after the Big Bang.
Quantum computers: Bar-Ilan University researchers develop superconducting flux qubits with unprecedented reproducibility
Dr. Michael Stern and co-workers from the Department of Physics and Quantum Entanglement Science and Technology (QUEST) Center at Bar-Ilan University in Israel are attempting to build superconducting processors based on a type of circuit called superconducting flux qubits. A flux qubit is a micron-sized superconducting loop where electrical current can flow clockwise or counter-clockwise, or in a quantum superposition of both directions. Contrary to transmon qubits, these flux qubits are highly non-linear objects and can thus be manipulated on very short time scales with high fidelity. The main drawback of flux qubits, however, is that they are particularly difficult to control and to fabricate. This leads to sizeable irreproducibility and has limited their use in the industry until now to quantum annealing optimization processes such as the ones realized by D-Wave.
Using a novel fabrication technique and state-of the-art equipment, a group led by Dr. Stern, in collaboration with Pr
It’s colossal: Creating the world’s largest dilution refrigerator
To cool quantum computing components, researchers use machines called dilution refrigerators. Researchers and engineers from the SQMS Center are building Colossus, the largest, most powerful refrigerator at millikelvin temperatures ever made. The new machine will enable new physics and quantum computing experiments.
Media Tip: Stretching qubit lifetimes with asymmetrical crystal environments
Adaptable and versatile, molecular qubits hold promise for numerous quantum applications. By altering the qubit’s host environment, a team supported by the Q-NEXT quantum center has extended the length of time these qubits can maintain information.
How Berkeley Lab’s Advanced Quantum Testbed Paves Breakthroughs For Quantum Computing
Since 2018, Berkeley Lab’s Advanced Quantum Testbed (AQT) has led several scientific breakthroughs in quantum computing across various areas. AQT also operates an open-access experimental testbed designed for deep collaboration with external users from academia, national Laboratories, and industry.
Stability in asymmetry: Scientists extend qubit lifetimes
Adaptable and versatile, molecular qubits hold promise for numerous quantum applications. By altering the qubit’s host environment, a team supported by the Q-NEXT quantum center has extended the length of time these qubits can maintain information.
UAH student overcomes setbacks of war to solve a difficult quantum optical system problem
In work applicable to super-fast quantum computing and quantum optics, undergraduate research by a recent graduate in physics and mathematics at The University of Alabama in Huntsville (UAH) has simplified a difficult mathematical problem to further illuminate the behavior of two-level quantum optical systems.
New Error Mitigation Approach helps Quantum Computers Level Up
Quantum computers are prone to errors that limit their usefulness in scientific research. While error correction would be the ideal solution, it is not yet feasible due to the number of qubits needed. New research shows the value of an error mitigation approach called noise estimation circuits for improving the reliability of quantum computer simulations.
Building a better quantum bit: New qubit breakthrough could transform quantum computing
A team led by researchers at the U.S. Department of Energy’s (DOE) Argonne National Laboratory, in close collaboration with FAMU-FSU College of Engineering Associate Professor of Mechanical Engineering Wei Guo, has announced the creation of a new qubit platform that shows great promise to be developed into future quantum computers. Their work is published in Nature.
Quantum, Classical Computing Combine to Tackle Tough Optimization Problems
A research team led by the Georgia Tech Research Institute (GTRI) was recently selected for second-phase funding of a $9.2 million project aimed at demonstrating a hybrid computing system that will combine the advantages of classical computing with those of quantum computing to tackle some of the world’s most difficult optimization problems.
Nurturing quantum computers: Error-protected qubits in a silicon photonic chip
Quantum states of particles are very fragile. The quantum bits, or qubits, that underpin quantum computing pick up errors very easily and are damaged by the environment of the everyday world. Fortunately, we know in principle how to correct for…
Software evaluates qubits, characterizes noise in quantum annealers
High-performance computer users in the market for a quantum annealing machine or looking for ways to get the most out of one they already have will benefit from a new, open-source software tool for evaluating these emerging platforms at the individual qubit level.
Mapping the Electronic States in an Exotic Superconductor
Scientists mapped the electronic states in an exotic superconductor. The maps point to the composition range necessary for topological superconductivity, a state that could enable more robust quantum computing.
Naturally Occurring Radiation Limits Superconducting Qubit Coherence Times
Two new experiments have demonstrated the correlation between natural radiation levels and the duration of qubit coherence. If radiation cannot be mitigated, it will limit the coherence time of qubits to a few milliseconds.
Quirky Response to Magnetism Presents Quantum Physics Mystery
The search is on to discover new states of matter, and possibly new ways of encoding, manipulating, and transporting information. One goal is to harness materials’ quantum properties for communications that go beyond what’s possible with conventional electronics. Topological insulators–materials that act mostly as insulators but carry electric current across their surface–provide some tantalizing possibilities. Scientists at Brookhaven Lab describe one such material that should be right just right for making qubits. But this material doesn’t obey the rules.
Creating the Heart of a Quantum Computer: Developing Qubits
To use quantum computers on a large scale, we need to improve the technology at their heart – qubits. Qubits are the quantum version of conventional computers’ most basic form of information, bits. The DOE’s Office of Science is supporting research into developing the ingredients and recipes to build these challenging qubits.