Physics in the World
A weekly pupil-friendly look at real physics discoveries, breakthroughs and applications. We take complex science, check reliable sources, and connect it to ideas you already meet in GCSE, AS and A Level Physics.
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11 min read
Nuclear fusion in metal foils: why quantum tunnelling matters at low energies
Experiments with deuterium-loaded palladium and titanium foils found that fusion yields stopped falling as expected below about 2 keV. The result suggests that a solid material can change the environment in which nuclei tunnel and react, although the absolute fusion rate remains far too small for power generation.
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Weekly archive
Week beginning 3 August 2026
Nuclear fusion in metal foils: why quantum tunnelling matters at low energies
Experiments with deuterium-loaded palladium and titanium foils found that fusion yields stopped falling as expected below about 2 keV. The result suggests that a solid material can change the environment in which nuclei tunnel and react, although the absolute fusion rate remains far too small for power generation.
Why pressure can make electric-car batteries last longer
University of Cambridge researchers found that keeping lithium-ion pouch-cell electrodes under a carefully controlled stack pressure could double their cycle life. Too little pressure encouraged cathode cracking, while too much promoted lithium plating, so the result is about finding a narrow engineering balance rather than simply squeezing a battery harder.
How heat-transfer fins help phase-change materials store energy faster
Three-dimensional simulations show that several well-spaced fins can melt a phase-change material more effectively than one large fin. The reason is not just extra conduction: liquid in the gaps starts circulating and transfers energy, while fins placed too close together can interfere with one another.
Week beginning 20 July 2026
Euclid discovers the most ancient quasars: how redshift lets us see the early Universe
ESA's Euclid telescope has found 31 extremely early quasars, including the record-holder at redshift 7.77. Their stretched light shows how spectra and infrared observations let physicists study the young Universe.
Room-temperature quantum material controls quantum light on a chip
A Nature study reports a patterned gold-chip material that can sort and preserve selected quantum properties of light at room temperature, pointing to new photonic technologies without claiming a room-temperature quantum computer.
CERN sees a wake in quark-gluon plasma
CMS scientists at CERN have observed a diffusion wake left by fast quarks and gluons in quark-gluon plasma, giving physicists a new way to study matter that filled the Universe shortly after the Big Bang.
Week beginning 13 July 2026
Why AI data centres use so much electricity
AI is rapidly increasing data-centre demand, but the physics is clearer than the headlines: electrical power runs the processors, and nearly all of that energy ultimately has to leave the building as heat.
Tiny infrared chip could spot heat leaks and gases more clearly
MIT researchers have made a chip-based infrared device whose tiny pixels can be controlled independently, potentially helping compact cameras detect heat leaks, gases and atmospheric pollutants.
Scientists recreate rotating black-hole wave physics without a black hole
A CUNY team has used a stationary ring of rapidly modulated electronic resonators to reproduce rotational super-radiance: a wave can gain energy from effective rotation and leave amplified.
Week beginning 6 July 2026
Quantum computers model molten salt for fusion fuel
Oak Ridge National Laboratory, Cleveland Clinic and IBM have used a hybrid quantum-classical workflow to calculate how tritium interacts with FLiBe, a molten salt being studied for future fusion reactor blankets.
AI helps physics models predict rare extreme heatwaves
Researchers have combined fast AI weather forecasts with physics-based climate modelling so rare, dangerous heatwaves can be sampled more efficiently and studied with better statistics.
TESS discovers its first planet using gravitational microlensing
NASA's TESS telescope has found its first gravitational microlensing planet: a super-Jupiter nearly 40,000 light-years away whose gravity briefly magnified a more distant star.
Optical-fibre experiment reveals Hawking radiation backreaction
A fibre-optic analogue of a black-hole horizon has revealed a direct process for stimulated Hawking-like radiation and measured how that radiation changes the light field that produced it.
Week beginning 29 June 2026
Attosecond microscope tracks electron tunnelling in space and time
An ultrafast scanning tunnelling microscope has followed electron wave packets over attoseconds and atomic distances, revealing a 500-attosecond response delay and a practical space-time limit for electron imaging.
Single trapped ion maps tiny electromagnetic fields above a chip
ETH Zurich researchers moved one laser-cooled beryllium ion through three dimensions to map electric and magnetic fields above a chip, detecting oscillating fields as small as 10 nanovolts per metre.
Quantum computer simulates quark string breaking with 104 qubits
A 104-qubit IBM processor has reproduced string breaking in a simplified particle-physics model, showing how quantum hardware could eventually help physicists calculate the formation of hadrons after collisions.
Graphene hosts superconducting states strengthened by magnetic fields
Four- and five-layer rhombohedral graphene produced several zero-resistance states, including superconductivity that survived 8.5-tesla fields and became stronger under conditions that usually destroy electron pairing.
Week beginning 22 June 2026
European XFEL test shows electrons behave differently in warm dense matter
An experiment at the European XFEL found that a widely used model overestimated electron oscillation energies in hot, compressed aluminium by up to 25%, improving how physicists study planets, materials and fusion fuel.
Superallowed alpha decay seen for the first time
Physicists have directly observed the extremely fast alpha decay of tellurium-104, giving pupils a clear example of nuclear decay, half-life and quantum tunnelling.
Hubble sees an early galaxy clearing the Universe's hydrogen fog
Hubble observations of the early galaxy MXDFz4.4 show young stars letting ultraviolet light escape, helping explain how the early Universe became transparent.
Week beginning 15 June 2026
Quantum entanglement found in a centimetre-sized strange metal
Neutron-scattering measurements of a strange metal have revealed quantum entanglement spread through a much larger piece of matter than pupils might expect.
Quantum atom sensor clears a path to dark matter and gravitational wave searches
A prototype atom interferometer has shown how laser noise can be cancelled, making future quantum sensors more useful for fundamental physics.
CERN finds the missing member of a doubly charmed particle family
Physicists working with the LHCb experiment have observed a new particle made from two charm quarks and one strange quark.
Webb watches an exoplanet heat up during a close pass by its star
The James Webb Space Telescope has observed a giant planet on a stretched orbit as it is heated strongly by its star.
Week beginning 25 May 2026
Week beginning 13 April 2026
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