Margot Taylor – director of functional neuroimaging at Toronto’s Hospital for Sick Children – is our first guest in this podcast. She explains how she uses optically-pumped magnetometers (OPMs) to do magnetoencephalography (MEG) studies of brain development in children.

An OPM uses quantum spins within an atomic gas to detect the tiny magnetic fields produced by the brain. Unlike other sensors used for MEG, which must be kept at cryogenic temperatures, OPMs can be deployed at room temperature in a simple helmet that puts the sensors very close to the scalp.

The OPM-MEG helmets are made by Cerca Magnetics and the UK-based company’s managing director joins the conversation to explain how the technology works. David Woolger also talks about the success the company has enjoyed since its inception in 2020.

Our final guest in this podcast is Stuart Nicol, who is chief investment officer at Quantum Exponential – a UK-based company that invests in quantum start-ups. He gives his perspective on the medical sector, talks about a company called Siloton that is making a crucial eye-imaging technology more accessible.

This podcast explores the extraordinary life of the Pakistani physicist Abdus Salam, who is celebrated for his ground-breaking theoretical work and for his championing of physics and physicists in developing countries.

In 1964, he founded the Abdus Salam International Centre for Theoretical Physics (ICTP) in Trieste, Italy – which supports research excellence worldwide with a focus on physicists in the developing world. In 1979 Salam shared the Nobel Prize for Physics for his work on the unification of the weak and electromagnetic interactions.

Salam spent most of his career at Imperial College London and the university is gearing up to celebrate the centenary of his birth in January 2026. In this episode of the Physics World Weekly podcast, Imperial physicists Claudia de Rham and Ian Walmsley look back on the extraordinary life of Salam – who died in 1996. They also talk about the celebrations at Imperial College.

Image courtesy: AIP Emilio Segrè Visual Archives, Physics Today Collection

This episode of the Physics World Weekly podcast features an interview with Margaret Arakawa. She is chief marketing officer at IonQ – which makes trapped ion quantum computers. An economist by training, Arakawa spent 25 years in the (classical) computing industry before joining IonQ. We chat about why she made the move to the quantum sector and about the wide range of opportunities for non-physicists in the quantum-technology industry.

Arakawa also talks about the challenges of marketing quantum technology to customers who might not understand the underlying physics and explains why the quantum industry must avoid hype.

Our second guest is Nat Mendelsohn, who represents the English Midlands on the Institute of Physics’ Student Community Panel. He talks to Physics World’s Katherine Skipper about the student experience – what is good and what can be improved. He also explains how the COVID-19 pandemic continues to have a profound impact on higher education.

Finally, I chat with Skipper about her trip to Prague for the 42nd International Conference on High Energy Physics. High on the agenda was what collider of the future will be the successor of the Large Hadron Collider.

Our first guest in this episode of the Physics World Weekly podcast is Derek Sutherland, who is head of FuZE-Q physics at the US-based company Zap Energy. He explains how the US-based firm is designing a fusion system that does not rely on magnets, cryogenics or high-powered lasers to generate energy. We also chat about the small-scale fusion industry in general, and about career opportunities for physicists in the sector.

This episode also features an interview with theoretical physicist and author Claudia de Rham. She talks to Physics World’s Matin Durrani about her new popular-science book The Beauty of Falling. They also chat about her research, which addresses a range of fundamental problems associated with gravity – from quantum to cosmological scales.

This episode is supported by Pfeiffer Vacuum. The company provides all types of vacuum equipment, including hybrid and magnetically-levitated turbopumps, leak detectors and analysis equipment, as well as vacuum chambers and systems. You can explore all of its products on the Pfeiffer Vacuum website.

New and exciting technologies feature in this episode of the Physics World Weekly podcast.

Our first guest is the neuroscientist and physicist Jelena Lazovic Zinnanti, who recalls how she discovered (by accident) that nanometre-sized diamond particles shine brightly in magnetic resonance imaging (MRI) experiments. Based at Max Planck Institute for Intelligent Systems, she explains how this diamond dust could someday replace gadolinium as a contrast agent in MRI medical scans.

This episode also features an interview with Mahdi Bodaghi of Nottingham Trent University, who is an expert in 4D and 3D printing. He talks about the engineering principles that guide 4D printing and how the technique can be used in a wide range of applications including the treatment of coronary heart disease and the design of flatpack furniture. Bodaghi also explains how 3D printing can be used to create self-healing asphalt.

This episode of the Physics World Weekly podcast explores how medical physicists are using exciting new technologies to make precision medicine possible. Our guests are Anna Barnes, Director of the King’s Technology Evaluation Centre at Kings College London and President of IPEM, and Nicky Whilde, who is head of radiotherapy physics at the Mid and South Essex NHS Foundation Trust.

In a wide-ranging conversation with Physics World’s Tami Freeman, Whilde and Barnes define the key concepts of precision medicine and explain how they are being implemented by medical physicists using magnetic resonance imaging, radiotherapy and other technologies.

This episode is supported by PTW, the dosimetry specialist.

This episode features an in-depth  conversation with Shrinivas Kulkarni, who won the 2024 Shaw Prize in Astronomy “for his ground-breaking discoveries about millisecond pulsars, gamma-ray bursts, supernovae, and other variable or transient astronomical objects”. Based at Caltech in the US, he is also cited for his “leadership of the Palomar Transient Factory and its successor, the Zwicky Transient Facility, which have revolutionized our understanding of the time-variable optical sky”.

Kulkarni talks about his fascination with astronomical objects that change over time and he reveals the principles that have guided his varied and successful career. He also offers advice to students and early-career researchers about how to thrive in astronomy.

This podcast also features an interview with Scott Tremaine, who is chair of the selection committee for the 2024 Shaw Prize in Astronomy. Based at the Institute for Advanced Study in Princeton, New Jersey, he talks about Kulkarni’s many contributions to astronomy, including his work to make astronomical data more accessible to researchers not affiliated with major telescopes.

This podcast is sponsored by The Shaw Prize Foundation

Today’s noisy quantum processors are prone to errors that can quickly knock a quantum calculation off course. As a result, quantum error correction schemes are used to make some nascent quantum computers more tolerant to such faults.

This involves using a large number of qubits – called “physical” qubits – to create one fault-tolerant “logical” qubit. A useful fault-tolerant quantum computer would have thousands of logical qubits and this would require the integration of millions of physical qubits, which remains a formidable challenge.

In this episode of the Physics World Weekly podcast, I am in conversation with Stephanie Simmons, who is founder and chief quantum officer at Photonic Inc. The Vancouver-based company is developing optically-linked silicon spin qubits – and it has recently announced that it has distributed quantum entanglement between two of its modules.

I spoke with Simmons earlier this month in London at Commercialising Quantum Global 2024, which was organized by Economist Impact. She explains how the company’s qubits – based on T-centre spins in silicon – are connected using telecoms-band photons. Simmons makes the case that the technology can be integrated and scaled to create fault-tolerant computers. We also chat about the company’s manufacturing programme and career opportunities for physicists at the firm.

This episode features a wide-ranging interview with Sara Seager and David Charbonneau, who share the 2024 Kavli Prize in Astrophysics. Charbonneau is at Harvard University and Seager is at the Massachusetts Institute of Technology, and they won the prize for their discoveries of exoplanets and the characterization of their atmospheres.

Exoplanets are planets that orbit stars other than the Sun. Astronomers have confirmed the existence of more than 5000 exoplanets, and that number keeps increasing.

In this podcast, the two laureates talk about the astonishing range of exoplanets that have been observed and explain how astronomers study the atmospheres of these faint and distant objects. Seager and Charbonneau also talk about the search for biosignatures of life on distant exoplanets and look to the future of exoplanet astronomy.

This podcast is sponsored by The Kavli Prize.

What is the best way to teach nuclear physics? Is the discipline more difficult than particle physics? What does a nuclear physicist make of the film Oppenheimer? These are just three of the questions addressed by David Jenkins in this episode of the Physics World Weekly podcast. A nuclear physicist and author based at the UK’s University of York, Jenkins is in conversation with Physics World’s Matin Durrani.

Also featured in this episode is Dale Keeping, who is helium recovery manager at the UK’s ISIS Neutron and Muon Source. He explains how helium is used at the facility; where the helium supply comes from; and how he and his colleagues manage this non-renewable resource. Keeping also chats about an outreach initiative that involves collecting used party balloons so the helium can be re-used at ISIS.