Category Physics

This is the first CMOS full duplex receiver IC with integrated magnetic-free circulator. Credit: Negar Reiskarimian, Columbia Engineering

An engineer has integrated a non-reciprocal circulator and a full-duplex radio on a nanoscale silicon chip for the first time. This breakthrough technology needs only one antenna, thus enabling an even smaller overall system than one he developed last yea. It could revolutionize the field of telecommunications.

Krishnaswamy, director of the Columbia High-Speed and Mm-wave IC (CoSMIC) Lab said: “Our circulator is the first to be put on a silicon chip, and we get literally orders of magnitude better performance than prior work...

View of the vacuum chamber containing the atom trap (center). Credit: ©: AG QUANTUM, JGU

The engine is the result of experiments undertaken by the QUANTUM work group at the Institute of Physics of Johannes Gutenberg University Mainz (JGU) in collaboration with theoretical physicists of Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU). Heat engines have played an important role in shaping society ever since the Industrial Revolution. As in the case of motor vehicle engines, they transform thermal energy into mechanical force, and our modern lifestyle would be impossible without them. At the same time, progress in miniaturization is resulting in the creation of ever smaller devices.

A team used a Paul trap to capture a single electrically charged calcium atom...

Professor John Tyrer and the ExDtect device. Credit: Image courtesy of Loughborough University

As the world reels from the Brussels bombings, a device created at Loughborough University could provide the answer to safeguarding the travelling public. ExDtect – the brainchild of Loughborough professor John Tyrer – can identify tiny amounts of explosive particles invisible to the naked eye. Using complex laser technology it can remotely scan vehicles, cargo and crowded areas, eg airports, train stations and sports stadiums, automatically alerting an operator if it detects traces of explosives and accurately pinpointing its location.

The system is non-invasive, works in real time and causes no delays to the public or businesses...

A schematic image representing a periodic variation in the density of Cooper pairs (pairs of blue arrows pointing in opposite directions) within a cuprate superconductor. Densely packed rows of Cooper pairs alternate with regions having lower pair density and no pairs at all. Such a “Cooper pair density wave” was predicted 50 years ago but was just discovered using a unique “scanning Josephson tunneling microscope. Credit: Brookhaven National Laboratory

Scientists have produced the first direct evidence of a state of electronic matter first predicted by theorists in 1964. The discovery may provide key insights into the workings of high-temperature superconductors. The prediction was that “Cooper pairs” of electrons in a superconductor could exist in 2 possible states...