Normal view

There are new articles available, click to refresh the page.
Before yesterdayMain stream

Single ions in nano-sized particles: A new platform for quantum information processing

21 November 2023 at 14:56
Processing quantum information relies on interacting qubitsβ€”the basic building blocks of quantum informationβ€”to perform computational tasks. Scientists are searching for the optimal qubit platform that can perform operations more efficiently, accurately and as fast as possible.

Boomerang-like beams of light: Research makes progress toward observing quantum backflow in two dimensions

20 November 2023 at 17:44
Researchers at the University of Warsaw's Faculty of Physics have superposed two light beams twisted in the clockwise direction to create anti-clockwise twists in the dark regions of the resultant superposition. The results of the research have been published in Optica. This discovery has implications for the study of light-matter interactions and represents a step towards the observation of a peculiar phenomenon known as a quantum backflow.

Preparation of F-passivated ZnO for quantum dot photovoltaics

10 November 2023 at 17:35
For photovoltaic power generation, pn junction is the core unit. The electric field in the junction can separate and transport the electron and the hole to negative and positive electrodes, respectively. Once the pn junction is connected with a load and exposed to a light ray, it can convert photon power into electrical power and deliver this power to the load. This photovoltaic application has long been used as the power supply for satellites and space vehicles, and also as the power supply for renewable green energy.

Singles become pairs: New insights into the light scattering of atoms

26 October 2023 at 18:16
Researchers headed by JΓΌrgen Volz and Arno Rauschenbeutel from the Department of Physics at the Humboldt University of Berlin, partners of the DAALI project, have gained new insights into the scattering of light by a fluorescent atom, which could also be useful for quantum communication. The research team has now published their results in the journal Nature Photonics.

Scientists propose super-bright light sources powered by quasiparticles

19 October 2023 at 15:00
An international team of scientists is rethinking the basic principles of radiation physics with the aim of creating super-bright light sources. In a new study published in Nature Photonics, researchers from the Instituto Superior TΓ©cnico (IST) in Portugal, the University of Rochester, the University of California, Los Angeles, and Laboratoire d'Optique AppliquΓ©e in France proposed ways to use quasiparticles to create light sources as powerful as the most advanced ones in existence today, but much smaller.

Miniature magnetic resonance imager made of diamond

19 October 2023 at 14:21
The development of tumors begins with miniscule changes within the body's cells; ion diffusion at the smallest scales is decisive in the performance of batteries. Until now, the resolution of conventional imaging methods has not been high enough to represent these processes in detail. A research team lead by the Technical University of Munich (TUM) has developed diamond quantum sensors which can be used to improve resolution in magnetic imaging.

Uncovering the secrets of spin-orbit optical Rabi oscillations

12 October 2023 at 19:50
The Rabi oscillation has been proven to be one of the cornerstones of quantum mechanics, triggering substantial investigations in different disciplines including atomic and molecular physics, acoustics, and optics. Various important applications have been demonstrated, ranging from nuclear magnetic resonance imaging and spectroscopy to quantum information processing.

Alternative method cuts time for computer simulation of absorption spectrum from days to hour

11 October 2023 at 17:41
Absorption spectroscopy is an analytical chemistry tool that can determine if a particular substance is present in a sample by measuring the intensity of the light absorbed as a function of wavelength. Measuring the absorbance of an atom or molecule can provide important information about electronic structure, quantum state, sample concentration, phase changes or composition changes, among other variables, including interaction with other molecules and possible technological applications.

Toward metropolitan free-space quantum networks

10 October 2023 at 13:29
Quantum communications have rapidly progressed toward practical, large-scale networks based on quantum key distributions that spearhead the process. Quantum key distribution systems typically include a sender "Alice," a receiver "Bob," who generate a shared secret from quantum measurements for secure communication. Although fiber-based systems are well-suited for metropolitan scale, a suitable fiber infrastructure might not always be in place.

Scalable multipartite entanglement achieved with ultracold atoms in optical lattice

18 September 2023 at 15:50
Researchers from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS), in collaboration with researchers from Tsinghua University, led by Ma Xiongfeng, and Fudan University, led by Zhou You, have achieved significant advancements in the preparation and measurement of scalable multipartite entangled states.

A linear path to efficient quantum technologies

12 September 2023 at 14:54
Researchers at the University of Stuttgart have demonstrated that a key ingredient for many quantum computation and communication schemes can be performed with an efficiency that exceeds the commonly assumed upper theoretical limitβ€”thereby opening up new perspectives for a wide range of photonic quantum technologies.

Researchers make a significant step towards reliably processing quantum information

11 September 2023 at 14:39
Using laser light, researchers have developed the most robust method currently known to control individual qubits made of the chemical element barium. The ability to reliably control a qubit is an important achievement for realizing future functional quantum computers.

New insights into neutrino interactions

11 September 2023 at 13:53
Research at Hokkaido University has revealed that elusive particles called neutrinos can interact with photons, the fundamental particles of light and other electromagnetic radiation, in ways not previously detected. The findings from Kenzo Ishikawa, Professor Emeritus at Hokkaido University, with colleague Yutaka Tobita, lecturer at Hokkaido University of Science, were published in the journal Physics Open.