The sensitivity of a scanning-tunnelling microscope improves by up to a factor of 50 when...

Researchers have found quantitative evidence for a mechanism long predicted to be responsible for high-temperature...

The quantum coherence of a polariton condensate has been seen to oscillate as the condensate...

Materials that conduct electricity on their outsides, but not their insides, were once thought to be unusual. In fact, they’re ubiquitous,...

A century ago, the German physicists Otto Stern and Walther Gerlach carried out an experiment that gave an important credibility boost...

Physicists in Israel have printed a micro-optical element that generates a twisted Bessel beam on...

Overlooking the city of Granada in southern Spain, the Alhambra palace and fortress is an...

Large increase in light output could lead to better medical imaging

The post Nanophotonic patterns make scintillators shine brighter appeared first on Physics World.

Acquiring CT data at two different energies improves the quality of images used for radiotherapy treatment planning and offers an insight into functional processes inside the body

The post Imaging innovation sharpens the view for radiotherapy clinics appeared first on Physics World.

Acoustic signals produced during manufacturing provide real-time information about the form and quality of laser-induced graphene

The post Listening to graphene yields clues to its structure appeared first on Physics World.

Quantum 6, 669 (2022).

https://doi.org/10.22331/q-2022-03-17-669

We propose a quantum repeater architecture that can operate under ambient conditions. Our proposal builds on recent progress towards non-cryogenic spin-photon interfaces based on nitrogen-vacancy centers, which have excellent spin coherence times even at room temperature, and optomechanics, which allows to avoid phonon-related decoherence and also allows the emitted photons to be in the telecom band. We apply the photon number decomposition method to quantify the fidelity and the efficiency of entanglement established between two remote electron spins. We describe how the entanglement can be stored in nuclear spins and extended to long distances via quasi-deterministic entanglement swapping operations involving the electron and nuclear spins. We furthermore propose schemes to achieve high-fidelity readout of the spin states at room temperature using the spin-optomechanics interface. Our work shows that long-distance quantum networks made of solid-state components that operate at room temperature are within reach of current technological capabilities.

Theoretical work sheds light on the origins of unconventional superconductivity in 2D carbon

The post New explanation emerges for robust superconductivity in three-layer graphene appeared first on Physics World.