ISSUE 35 - June 2026

Cav
M a g

HOW FAST CAN QUANTUM COHERENCE SPREAD?

ALSO INSIDE

Death by black hole
New discovery challenges understanding of galaxy evolution

A last look
Final photos from Cavendish 2

The Moon as visible from Earth's orbit

ISSUE 35 - June 2026

Cav
M a g

HOW FAST CAN QUANTUM COHERENCE SPREAD?

The Moon as visible from Earth's orbit

Welcome
to CavMag 35

Harry Cliff

The first half of 2026 has brought a number of exciting developments here at the Cavendish Laboratory, from the announcement of a new strategic partnership with IonQ that will bring the UK’s most powerful quantum computer to the Ray Dolby Centre, to significant breakthroughs in our understanding of quantum matter, fundamental particles and ancient galaxies.

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However, it has also brought challenges. At the start of the year, the Science and Technology Facilities Council announced that it expects to make deep cuts to particle, nuclear and astrophysics research in the UK, citing fi nancial pressures and changing government priorities. These measures will devastate many of the areas in which the Cavendish is world leading, from probing the fundamental building blocks of nature at the Large Hadron Collider and neutrino experiments, to exploring the cosmos through radio astronomy and the James Webb Space Telescope. Physicists and astronomers across Cambridge have been grappling with the potential impact of these cuts while making the case, both in public and behind the scenes, for continued investment in fundamental physics, from which much of the talent and technology pipeline ultimately fl ows. Matt Kenzie explores the unfolding crisis and what can be done to resolve it in an opinion piece on page 5.

Meanwhile, the Cavendish continues to produce world-leading research. Christoph Eigen and Zoran Hadzibabic report on their discovery of a speed limit for the spread of quantum coherence in Bose Einstein condensates, with profound implications for our understanding of quantum matter and perhaps even cosmology. Magnus Handley gives an account of how new results from the MicroBooNE experiment have all but ruled out sterile neutrinos as an explanation for a long-standing anomaly, and Jan Scholtz, Francesco D’Eugenio and Roberto Maiolino tell the story of the supermassive black hole that snuffed out star formation in an ancient galaxy.

I would like to thank our Student Editors, Daniel Robins, Bofeng Xue and Minglei Zhang, who stepped in to produce issue 34 of CavMag while I was away on parental leave in late 2025. It was a pleasure working with such an enthusiastic and able team of young physicists, whose hard work resulted in an excellent edition of the magazine.

Finally, it was with great sadness that we learned that Peter Littlewood, internationally renowned condensed matter physicist and former Head of the Cavendish Laboratory, passed away on 15 June 2026. We extend our deepest sympathies to his family, friends, former students and colleagues. He will be greatly missed. An obituary of Peter will appear in the next edition of CavMag.


Features

How fast can quantum coherence spread?

Cavendish physicists have observed a fundamental rate limit for the spreading of quantum coherence, the process by which a system syncs into a single quantum state. The existence of such a limit has profound implications for disparate fields, from quantum computing to the evolution of the early universe.

MicroBooNE rules out a sterile neutrino but mysteries remain

Nature’s most elusive particle, the neutrino, remains mysterious as the MicroBooNE collaboration at Fermilab rules out a fourth flavour as the explanation for several long-standing anomalies.

Credit: NASA/JPL-Caltech

Credit: NASA/JPL-Caltech

Death by black hole

Cavendish astronomers have spotted one of the oldest ‘dead’ galaxies and found that a growing supermassive black hole can slowly starve a galaxy of the raw material needed for star formation. Their discovery challenges our understanding of galaxy evolution.

An interview with Lucy Oswald

Lucy Oswald joined the Cavendish in January as our new Assistant Professor in Data‑Driven Radio Astronomy. Her research focuses on pulsars, the enigmatic neutron stars famously discovered in Cambridge by Dame Jocelyn Bell Burnell. Lucy is building on that legacy and forging a path for future generations.

Goodbye Cavendish 2

The last-ever look inside the Cavendish Laboratory’s 1974 building, which is being demolished. A photo essay by Mićo Tatalović.

Opinion

Buckets, partitions and a quiet crisis in UK fundamental physics

Matt Kenzie writes: The Secretary of State has been explicit that the tests of success are jobs, turnover and venture capital. Fundamental physics scores on every one of those metrics, just not on a parliamentary-term timescale.

Alumni

Letter: On Margaret Hamilton and authorship

Dr Hannah Christenson writes: Many people have heard of Margaret Hamilton, the computer scientist. She led the team that wrote the software for the Apollo programme, enabling astronauts to travel to the moon and return safety.

Obituary

An appreciation of Doug Astill, who died in July 2025 aged 75.

News

Strategic partnerships 'supercharge' Cambridge's quantum research

Cambridge's quantum research and innovation have received a major boost.

UKRI funds SEQUIN to probe Earth with a hybrid quantum array

An interdisciplinary collaboration has received a £1.2m grant.

From neutrino physics to cancer detectionHeading

Research news on a project finding tumours in radiological imaging.

News in brief

The latest funding, research, departmental, alumni and awards news, including Marcos Guimarãres, the new Associate Professor in the Physics of Energy materials.

Outreach update

The Cambridge Festival came for the first time to the Ray Dolby Centre for a day of talks, demonstrations and hands-on activities.

How you can contribute

Information about how to support the work of the Department.