At first glance, a system consisting of 51 ions may appear simple. But even if these charged atoms can only assume two different states, there will be more than two quadrillion (1015) different configurations which the system can realize. The behavior of such a system can therefore hardly be calculated with conventional computers. Especially since once an excitation […]
Researchers have introduced an inductive n-qubit pure-state estimation method based on projective measurements on mn + 1 separable bases or m entangled bases plus the computational basis, with m ≥ 2. The method exhibits a favorable scaling in the number of qubits compared to other estimation schemes. The use of separable bases makes their estimation method particularly well suited for applications in noisy intermediate-scale […]
A new project undertaken by a University of Birmingham researcher at the UK Quantum Technology Hub Sensors and Timing along with colleagues in the School of Engineering will help to facilitate greater sustainability for future infrastructure projects through deploying novel solutions for reusing structural steel. The project, which is titled Reuse of Structural Steel in […]
Scientists have demonstrated that wires more than 100 times thinner than a human hair can act like a quantum one-way street for electrons when made of a peculiar material known as a topological insulator. The discovery opens the pathway for new technological applications of devices made from topological insulators and demonstrates a significant step on […]
Boson Sampling is a computational paradigm representing one of the most viable and pursued approaches to demonstrate the regime of quantum advantage. Recent results have shown significant technological leaps in single-photon generation and detection, leading to progressively larger instances of Boson Sampling experiments in different photonic systems. However, a crucial requirement for a fully-fledged platform […]
Researchers at the Max Planck Institute of Quantum Optics succeeded in massively improving the performance of a component that is crucial to optical quantum systems. Future quantum computers are expected not only to solve particularly tricky computing tasks, but also to be connected to a network for the secure exchange of data. In principle, quantum […]
A new two-path-interference experiment has been designed at TU Wien that only has to measure one specific particle to prove quantum superposition. A single neutron is measured at a specific position — and due to the sophisticated measurement setup, this single measurement proofs already that the particle moved along two different paths at the same […]
A team of researchers from Université Paris-Saclay, the University of Ulm and the Institute of Quantum Technologies has developed an on-chip circuit that produces up to six microwave photons at the same time. The circuit was designed using a Josephson junction, a coil inductor and a capacitor placed on a chip-sized base. A Josephson junction […]
The mixing of conduction band valleys plays a critical role in determining electronic spectrum and dynamics in a silicon nanostructure. Researchers have investigated theoretically how valley–orbit coupling affects the exchange interaction in a silicon double quantum dot. They found that exchange splitting can be strongly suppressed at finite valley phase differences between the dots because […]
Computational detective work by physicists has confirmed cerium zirconium pyrochlore is a 3D quantum spin liquid, a solid material in which quantum entanglement and the geometric arrangement of atoms cause electrons to fluctuate between quantum magnetic states no matter how cold they become. Despite the name, quantum spin liquids are solid materials in which quantum […]
