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Exploring Localization in Nuclear Spin Chains.

Ken Xuan Wei1, Chandrasekhar Ramanathan2, Paola Cappellaro3

  • 1Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Physical Review Letters
|March 16, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a new correlation metric to detect many-body localization (MBL) in solid-state spin systems using nuclear magnetic resonance (NMR). This metric distinguishes MBL from Anderson localization (AL), offering an experimentally accessible way to study quantum dynamics.

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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Quantum information science

Background:

  • Characterizing out-of-equilibrium dynamics in many-body systems is vital for quantum applications.
  • Understanding many-body localization (MBL) and its distinction from Anderson localization (AL) is key.
  • Experimental metrics are needed to probe localization in interacting systems.

Purpose of the Study:

  • To develop an experimentally measurable metric distinguishing MBL from AL.
  • To investigate the survival of localization in interacting many-body systems.
  • To demonstrate the metric's application in a natural solid-state spin system.

Main Methods:

  • Development of a novel correlation metric.
  • Utilizing nuclear magnetic resonance (NMR) spectroscopy.
  • Engineering Hamiltonians to introduce disorder and interactions in spin systems.

Main Results:

  • The novel correlation metric successfully distinguishes MBL from AL in high-temperature spin systems.
  • Localization was observed in a natural solid-state spin system using NMR.
  • The metric showed slow increase for MBL, analogous to entanglement entropy, while saturating for AL.

Conclusions:

  • The developed correlation metric provides an experimentally accessible probe for many-body localization.
  • NMR techniques are suitable for studying localization phenomena in spin systems.
  • The findings advance the understanding of quantum dynamics and localization in interacting systems.