Quantum Physics News

A star like a Matryoshka doll: New theory for gravastars

 Quantum Physics News
 15 February 2024
If gravitational condensate stars (or gravastars) actually existed, they would look similar to black holes to a distant observer. Two theoretical physicists have now found a new solution to Albert Einstein's theory of general relativity, according to which gravitational stars could be structured...

Fundamental equation for superconducting quantum bits revised

 Quantum Physics News
 14 February 2024
Physicists have uncovered that Josephson tunnel junctions -- the fundamental building blocks of superconducting quantum computers -- are more complex than previously thought. Just like overtones in a musical instrument, harmonics are superimposed on the fundamental mode. As a consequence,...

Direct view of tantalum oxidation that impedes qubit coherence

 Quantum Physics News
 05 February 2024
Scientists have used a combination of scanning transmission electron microscopy (STEM) and computational modeling to get a closer look and deeper understanding of tantalum oxide. When this amorphous oxide layer forms on the surface of tantalum -- a superconductor that shows great promise for making...

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