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AC Josephson effect between two superfluid time crystals.

S Autti1,2, P J Heikkinen3,4, J T Mäkinen3,5,6

  • 1Low Temperature Laboratory, Department of Applied Physics, Aalto University, Espoo, Finland. s.autti@lancaster.ac.uk.

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Summary
This summary is machine-generated.

Researchers observed interactions between two adjacent quantum time crystals, demonstrating their adherence to quantum mechanics. This study reveals the AC Josephson effect in time crystals, paving the way for quantum information processing applications.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Mechanics
  • Quantum Information Science

Background:

  • Quantum time crystals exhibit periodic order in the time domain, a concept initially considered speculative.
  • Previous research has confirmed the existence of various time crystals, but their dynamics and interactions remain unexplored experimentally.
  • Understanding inter-time crystal dynamics is crucial for advancing quantum technologies.

Purpose of the Study:

  • To experimentally investigate the dynamics and interactions between adjacent quantum time crystals.
  • To explore the fundamental properties of time crystals and their behavior under quantum mechanical principles.
  • To assess the potential of time crystals for applications in quantum information processing.

Main Methods:

  • Realization of two adjacent quantum time crystals using magnon condensates in superfluid 3He-B.
  • Experimental observation of magnon exchange between the two time crystals.
  • Measurement of population oscillations and phase coherence.

Main Results:

  • Observed magnon exchange between adjacent quantum time crystals, leading to opposite-phase population oscillations.
  • Identified the AC Josephson effect as the underlying mechanism for the observed oscillations.
  • Confirmed that the periodic motion of the time crystals remained phase coherent during the experiment.

Conclusions:

  • Time crystals adhere to the general dynamics of quantum mechanics, including phenomena like the AC Josephson effect.
  • The experimental demonstration of inter-time crystal dynamics provides a foundation for further research into their fundamental properties.
  • These findings open new avenues for the application of time crystals in quantum information processing and other developing fields.