Science Daily February 16, 2018 To protect the quantum properties of a spin, control over its local environment, including energy relaxation and decoherence processes, is crucial. An international team of researchers (South Korea, USA – industry, Germany, Switzerland, Portugal, Spain) was able to precisely image individual iron atoms and measure and control the time that the iron atom can maintain its quantum behavior. They showed that the loss in quantum state superposition is mainly caused by nearby electrons that the researchers injected with extreme control into the iron atom. Understanding these destructive interactions allows us to avoid them in future […]
Tag Archives: Quantum computing
Controlling quantum interactions in a single material
Science Daily February 5, 2018 Using computational simulations, an international team of researchers (USA – Northwestern University, Austria, Germany, China) discovered coexisting quantum-mechanical interactions in the compound silver-bismuth-oxide. Bismuth enables the spin of the electron to interact with its own motion and does not exhibit inversion symmetry. By applying an electric field to the material, researchers were able to control whether the electron spins were coupled in pairs or separated as well as whether the system is electrically conductive or not. The findings could enable ultrafast, low-power electronics and quantum computers that operate faster than current models… read more. Open Access […]
Job One for Quantum Computers: Boost Artificial Intelligence
Quanta Magazine January 29, 2018 The fusion of quantum computing and machine learning has become a booming research area. Can it possibly live up to its high expectations? Although one might think a quantum machine-learning system should be powerful, it suffers from a kind of locked-in syndrome. It operates on quantum states, not on human-readable data, and translating between the two can negate its apparent advantages… read more.
Single-photon detector can count to 4
Source: Nanowerk December 15,2017 A team of researchers in the US (Duke University, Ohio State University, industry) used the superconducting nanowire single-photon detector (SNSPD) method to show multi-photon detection indicating number resolution up to four photons. They paid special attention to the specific shape of the initial spike in the electrical signal to correctly count at least four photons traveling together in a packet. Photon-number-resolution is very useful for a lot of quantum information/communication and quantum optics experiment; it could greatly increase the speed of quantum encryption techniques… read more. Open Access TECHNICAL ARTICLE