Quantum machine learning hits a limit
A black hole permanently scrambles information that can’t be recovered with any quantum machine learning algorithm, shedding new light on the classic Hayden-Preskill thought experiment.
Cold chips can control qubits
QuTech has resolved a major issue on the road towards a working large-scale quantum computer. QuTech, together with Intel, has designed and fabricated an integrated circuit that can operate at extremely low temperatures when controlling […]
Light meets superconducting circuits
Researchers in the group of Professor Tobias J. Kippenberg at EPFL’s School of Basic Sciences have now developed a novel approach that uses light to read out superconducting circuits, thus overcoming the scaling challenges of […]
Low temperature physics gives insight into turbulence
A novel technique for studying vortices in quantum fluids has been developed by physicists. Turbulence in quantum systems, for example in superfluid helium 4, takes place on microscopic scales, and so far scientists have not […]
Light emitters for quantum circuits
The promise of a quantum internet depends on the complexities of harnessing light to transmit quantum information over fiber optic networks. A potential step forward was reported today by researchers who developed integrated chips that […]
THz emission spectroscopy reveals optical response of GaInN/GaN multiple quantum wells
An international team of researchers came closer to unraveling the complicated optical response of wide-bandgap semiconductor multiple quantum wells and how atomic-scale lattice vibration can generate free space terahertz emission. Their work provides a significant […]
Chinese team designs a 62-qubit quantum processor
A Chinese research team from the University of Science and Technology of China (USTC) has successfully designed a 62-qubit programmable superconducting quantum processor, naming it Zu Chongzhi after the noted 5th century Chinese mathematician and astronomer. The […]
Capturing a single photon of light: Harnessing Quantum’s ‘noise problem’
Scientists at Raytheon BBN Technologies have developed a new way to detect a single photon — a development with big applications for sensors, communications and exponentially more powerful quantum computer processors. Josephson junctions are superconducting […]
Quantum drum duet entanglement
Researchers at the National Institute of Standards and Technology (NIST) have “entangled” two small mechanical drums and precisely measured their linked quantum properties. Entangled pairs like this might someday perform computations and transmit data in […]
Entanglement from tensor networks on a trapped-ion QCCD quantum computer
The ability to selectively measure, initialize, and reuse qubits during a quantum circuit enables a mapping of the spatial structure of certain tensor-network states onto the dynamics of quantum circuits, thereby achieving dramatic resource savings […]
New boost in quantum technologies
Researchers at the University of Stuttgart were able to detect qubits in two-dimensional materials for the first time. Quantum computers or quantum sensors consist of materials that are completely different to their classical predecessors. These […]
Quantum walks on a two-dimensional 62-qubit superconducting processor
Quantum walks are the quantum mechanical analog of classical random walks and an extremely powerful tool in quantum simulations, quantum search algorithms, and even for universal quantum computing. A team of researchers have designed and […]
Evading the uncertainty principle in quantum physics
In quantum mechanics, the Heisenberg uncertainty principle dictates that the position and speed of an object cannot both be known fully precisely at the same time. Researchers now show that two vibrating drumheads, the size […]
Processing Quantum Signals Carried by Electrical Currents
A team of French and Dutch researchers present a general signal processing method for processing, analysing and representing electrical quantum currents directly at the level of individual electronic wave functions.
Quantum Sensing: Spin defects under control
About a year ago, a team from the Institute of Physics at Julius-Maximilians-Universität (JMU) Würzburg in Bavaria, Germany, succeeded in creating spin defects, also known as qubits, in a layered crystal of boron nitride and […]
How to bring molecules at once into a single quantum state
Researchers at University of Chicago showed how to bring multiple molecules at once into a single quantum state — one of the most important goals in quantum physics. One of the essential states of matter […]
Ion beams mean a quantum leap for color-center qubits
A Lawrence Berkeley National Laboratory-led international team of researchers has discovered a way to use ion beams to create long strings of “color center” qubits in diamond. Creating large numbers of high-quality qubits, in close […]
Machine learning algorithm unravels quantum physics
Scientists from the University of Bristol’s Quantum Engineering Technology Labs (QETLabs) have developed a Machine Learning algorithm that provides valuable insights into the physics underlying quantum systems. The team from QET Labs has described an algorithm which […]
Josephson junction infrared single-photon detector
Josephson junctions are simple superconducting devices comprising an insulator or semiconductor separating two superconducting regions. They form the workhorse of superconducting technologies and are exquisitely sensitive to magnetic field. One long-sought proposal has been to […]
New superconducting thermometer for Quantum Computers
Researchers at Chalmers University of Technology, Sweden, have developed a novel type of thermometer that can simply and quickly measure temperatures during quantum calculations with extremely high accuracy. The breakthrough provides a benchmarking tool for quantum computing. In […]
One-hour coherent optical quantum storage
Photon loss in optical fibers prevents long-distance distribution of quantum information on the ground. Quantum repeater is proposed to overcome this problem, but the communication distance is still limited so far because of the system […]
First ever image of an electron’s orbit within an exciton
In a world first, researchers from the Okinawa Institute of Science and Technology Graduate University (OIST) have captured an image showing the internal orbits, or spatial distribution, of particles in an exciton—a goal that had […]
Fault-tolerant quantum computer based on Schrödinger-cat qubits
At the AWS Center for Quantum Computing, Amazon’s scientists are doing scientific research and development on Quantum Computing algorithms and hardware. They posted a summary of their findings from their first architecture paper that describes a theoretical […]
Genuine Multipartite Entanglement in noisy Quantum Error Correction circuits
Ensuring the correct functioning of Quantum Error Correction (QEC) circuits is crucial to achieve fault tolerance in realistic quantum processors subjected to noise. The first checkpoint for a fully operational QEC circuit is to create […]
Materials advances are key to development of Quantum hardware
A new study outlines the need for materials advances in the hardware that goes into making quantum computers. The team of researchers surveyed the state of research on quantum computing hardware with the goal of […]