Level 1 — Absolute Beginner
Scientists study tiny magnetic waves called magnons. Magnons could help build very small quantum computers.
In the past, magnons only lasted for a very short time. This made them hard to use.
A team of scientists in Vienna found a way to make magnons last almost 100 times longer.
This could help build quantum computers as small as a one-cent coin.
- scientist
- a person who studies and learns about the natural world
- magnetic
- having the power to attract certain metals, like a magnet
- wave
- a moving disturbance that carries energy from one place to another
- quantum computer
- a very powerful type of computer that uses the rules of tiny particles to solve problems
- team
- a group of people working together
- almost
- very nearly, but not completely
- coin
- a small, flat piece of metal used as money
- build
- to make or construct something
Level 2 — Elementary
An international team of physicists led by Andrii Chumak at the University of Vienna has found a way to make magnons, tiny magnetic waves, last much longer than before.
Magnons carry information the way electrical signals do in normal computers, but in the past they disappeared too quickly to be useful for building computers.
The team extended the lifetime of magnons nearly a hundredfold, reaching up to 18 microseconds, which is long enough to be useful in real quantum devices.
The scientists discovered that the short lifetime was never a basic law of physics. It was caused by impurities in the magnetic material, meaning better materials could push the lifetime even further.
- physicist
- a scientist who studies matter, energy, and how they interact
- electrical signal
- information carried by an electric current, used in normal computers
- extend
- to make something last longer or reach further
- microsecond
- one millionth of a second, a very tiny unit of time
- device
- a machine or tool made for a specific purpose
- basic law of physics
- a fundamental rule that describes how the natural world behaves
- impurity
- an unwanted substance mixed into a material that affects its quality
- material
- the substance that something is made from
Level 3 — Intermediate
An international team of physicists led by Andrii Chumak at the University of Vienna has extended the lifetime of magnons, quantized spin waves that ripple through magnetic materials, nearly a hundredfold, reaching durations of up to 18 microseconds.
Magnons had long been considered promising carriers of quantum information because they can be manipulated on chips far smaller than those required for superconducting qubits, but their extremely brief lifetimes previously limited their practical use.
Published in the journal Science Advances, the research demonstrates that this brevity was never dictated by a fundamental law of physics but instead stemmed from impurities within the magnetic materials used in earlier experiments.
By using purer materials, the team pushed magnon performance close to the timescales required for practical quantum technologies, raising the prospect of quantum computers built onto chips as small as a one-cent coin.
- quantized
- existing only in discrete, separate amounts rather than a continuous range
- spin wave
- a wave-like disturbance in the magnetic alignment of atoms within a material
- carrier
- something that transports or holds information or a signal
- manipulate
- to control or handle something skillfully for a particular purpose
- superconducting qubit
- a quantum bit built from materials that conduct electricity with no resistance at very low temperatures
- brevity
- shortness in duration or extent
- dictate
- to determine or strictly control the nature of something
- prospect
- the possibility that something will happen in the future
Level 4 — Advanced
An international team of physicists led by Andrii Chumak at the University of Vienna has extended the coherence lifetime of magnons, quantized spin waves propagating through magnetically ordered materials, nearly a hundredfold, reaching durations of up to 18 microseconds.
Magnons have long been regarded as promising carriers of quantum information because they can, in principle, be manipulated on chips far smaller than those demanded by superconducting qubit architectures, yet their historically fleeting lifetimes had constrained their practical viability.
Publishing in Science Advances, the researchers demonstrate that this brevity was never imposed by a fundamental physical law but instead arose from impurities embedded within the magnetic materials employed in prior experiments.
By substituting purer magnetic substrates, the team brought magnon performance within reach of the timescales practical quantum technologies require, lending credibility to the prospect of quantum processors fabricated onto chips no larger than a one-cent coin.
- coherence lifetime
- the length of time a quantum system retains its precise, usable state before losing it
- propagate
- to spread or travel through a medium, such as a wave through a material
- architecture
- here, the underlying design or structural approach of a technological system
- viability
- the capacity to work successfully or be put into practical use
- impose
- to force or bring about a rule, limit, or condition
- substitute
- to use one thing in place of another
- substrate
- the underlying layer or material on which something is built or grown
- fabricate
- to construct or manufacture something, especially in a precise, engineered way
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