Category: Allgemein

Certified entangled In this entanglement certification scheme involving weak certification and reversal measurements, two parties (traditionally known as Alice and Bob) sitting in their respective laboratories share a potentially entangled pair of systems in the shared state |Ψi⟩. In the certification step, they subject their local systems to weak certification measurements to obtain statistics. In… Continue reading Weak measurement lets quantum physicists have their cake and eat it

It is not often that a campaign launched by a scientific learned society finds itself featured on the front page of the Daily Star. But that is what happened, not once, but twice over the past year when the paper responded to a call from the Institute of Physics (IOP), which publishes Physics World, for… Continue reading Why the Institute of Physics launched a campaign to get the media to ‘Bin the boffin’

Scientists in the US have introduced an ingenious new quantum chip architecture that significantly reduces disturbances caused by the signals used to control superconducting quantum bit (qubit) circuits. Led by Chuan Hong Liu and Robert McDermott of the University of Wisconsin, the team showed that the new multichip module (MCM) reduces gate errors by nearly… Continue reading New chip architecture offers hope for scaling up superconducting qubit arrays

Cosmic image: illustration of how, with further improvements, the new SNSPD could be used to observe astronomical objects. (Courtesy: S Kelley/NIST/Pixaby) n The highest resolution to date in a superconducting nanowire single-photon detector (SNSPD) camera has been claimed by researchers in the US. Designed by a team at the National Institute of Standards and Technology… Continue reading New superconducting nanowire single-photon detector has 400,000 pixels

The 2024 Rank Prize winners Left to right: Junzhong Liang, Donald Miller, Austin Roorda and David Williams. (Courtesy: Rank Prize) n Four scientists who pioneered the development of adaptive optics (AO) technologies for imaging the human retina have been awarded the 2024 Rank Prize for Optoelectronics. The winners – Junzhong Liang, Donald Miller, Austin Roorda… Continue reading Adaptive optics pioneers win Rank Prize for retinal imaging breakthroughs

One of the scariest moments in Robert Oppenheimer’s career was not shown in Oppenheimer, the recent blockbuster movie. That moment occurred during the contentious hearing on his security clearance, which concerned Oppenheimer’s role on a committee to advise the US government on nuclear weapons. Ostensibly about his loyalty to America, the hearing also revealed deeper… Continue reading What the movie Oppenheimer can teach today’s politicians about scientific advice

In the race for the quantum computing platform of the future, neutral atoms have been a bit of an underdog. While quantum bits (qubits) based on neutral atoms have several attractive characteristics, including the ease of scaling up qubit numbers and performing operations on them in parallel, most attention has focused on rival platforms. Many… Continue reading Neutral-atom quantum computers are having a moment

<p>Electrons move through a conducting material like commuters at the height of Manhattan rush hour. The charged particles may jostle and bump against each other, but for the most part they’re unconcerned with other electrons as they hurtle forward, each with their own energy.</p>nn<p>But when a material’s electrons are trapped together, they can settle into… Continue reading Physicists trap electrons in a 3D crystal for the first time

One hundred and fifty years ago in the US, the combined power of four strong horses harnessed to a plough was no more than 3 kilowatts – and more than half the entire labour force worked on farms. Today, even the smallest John Deere tractor produces 120 kilowatts and about 1.3% of workers are employed… Continue reading Size matters: the economies of scale, from the very big to the very small

Emerging systems for quantum communications and cryptography rely on the ability to transmit single photons with high fidelity. Single-photon emitters based on quantum dots cooled to cryogenic temperatures have been shown to produce indistinguishable single photons with high brightness, but for practical use in real-world communications networks both the single-photon source and its cooling mechanism… Continue reading Cool tricks offer new solutions for quantum networking