Phys.org April 22, 2022 Gate-model quantum computers promise to solve currently intractable computational problems if they can be operated at scale with long coherence times and high-fidelity logic. Neutral-atom hyperfine qubits provide inherent scalability owing to their identical characteristics, long coherence times and ability to be trapped in dense, multidimensional arrays. Combined with the strong entangling interactions provided by Rydberg states all the necessary characteristics for quantum computation are available. An international team of researchers (USA – University of Central Florida, Harvard University, University of Wisconsin-Madison, industry, MIT, UK, Austria,) demonstrated several quantum algorithms on a programmable gate-model neutral-atom quantum […]
Category Archives: Quantum circuits
Tapping into magnets to clamp down on noise in quantum information
Phys.org September 3, 2021 Building on their earlier efforts to create a superconducting circuit integrated with magnetic elements, a team of researchers in the US (Argonne National Laboratory, University of Illinois) is investigating whether magnons could partner with microwave photons to ensure that microwaves can only travel in one direction, thereby essentially eliminating noise. They will be testing known and new material systems to find candidates that can handle an ultracold environment and operate in a real quantum device. According to the researchers if they are successful, it is possible to have magnetic structures directly integrated with quantum circuitry. The […]
Researchers in Sweden develop light emitter for quantum circuits
Phys.org May 10, 2021 For photons to deliver qubits on-demand in quantum systems, they need to be emitted in a deterministic, rather than probabilistic, fashion. An international team of researchers (Sweden, the Netherlands) has developed a process to harness the single-photon-emitting properties of hexagonal boron nitride (hBN) integrating it with silicon nitride waveguides to emit photons on-demand at room temperature. Their process precisely positions light-particles emitters in an integrated photonic circuit. In a hybrid approach, the team built the photonic circuits with respect to the quantum sources locations using a series of steps involving electron beam lithography and etching, while […]