TU Dresden Superconductor and Magnetic Field Research Could Lead to New Applications in Quantum Computing

Superconductors with ‘zeitgeist’ – when materials differentiate between the past and the future

Key points…

+  Physicists at TU Dresden have discovered spontaneous static magnetic fields with broken time-reversal symmetry in a class of iron-based superconductors. This exceptional property calls for new theoretical models and may become important in quantum computing.

“In our study, we show that the iron-based superconductors discovered more than twelve years ago continue to reveal new quests for fundamental research as well as chances for new applications,” states Prof. Hans-Henning Klauss.

+  What happened yesterday and what will happen tomorrow are usually two different and quite independent matters. The past and the future of human life are not symmetric and therefore not reversible. In physics, this is different. The fundamental forces of nature in elementary particles, atoms and molecules are symmetric with respect to their development in time: Forwards or backwards makes no difference, scientists call this a time-reversal symmetry

+  However, for some years, physicists have been discovering new superconductors which brake time-reversal symmetry. To explain these observations, the basic mechanism of superconductivity, which has been known for more than 75 years, had to be modified considerably. Only these novel superconductors are able to spontaneously generate constant internal magnetic fields. This can lead to new applications, for example in quantum computing devices.

Source:  PHYS.ORG.  Dresden University of Technology,  Superconductors with ‘zeitgeist’ – when materials differentiate between the past and the future…

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