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May 25th

Refrigerator for quantum computers discovered

  • Science
  • Nanotechnology

Nanowerk News – The global race towards a functioning quantum computer is on. With future quantum computers, we will be able to solve previously impossible problems and develop, for example, complex medicines, fertilizers, or artificial intelligence.

The research results published today in the scientific journal, Nature Communications ("Quantum-Circuit Refrigerator"), suggest how harmful errors in quantum computing can be removed. This is a new twist towards a functioning quantum computer.

How quantum computers differ from the computers that we use today is that instead of normal bits, they compute with quantum bits, or qubits. The bits being crunched in your laptop are either zeros or ones, whereas a qubit can exist simultaneously in both states. This versatility of qubits is needed for complex computing, but it also makes them sensitive to external perturbations.

Just like ordinary processors, a quantum computer also needs a cooling mechanism. In the future, thousands or even millions of logical qubits may be simultaneously used in computation, and in order to obtain the correct result, every qubit has to be reset in the beginning of the computation. If the qubits are too hot, they cannot be initialized because they are switching between different states too much. This is the problem Möttönen and his group have developed a solution to.

Read more at Nanowerk News.

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 Kuan Yen Tan