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Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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Acoustic Bound Pairs under Nonreciprocal Two-Body Interactions.

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Summary
This summary is machine-generated.

This study integrates nonreciprocity into two-body interactions, revealing novel phenomena like the non-Hermitian inverse skin effect and time cluster effect in correlated systems.

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Area of Science:

  • Quantum physics
  • Condensed matter physics

Background:

  • Non-Hermiticity expands many-body physics beyond the Hermitian paradigm.
  • Existing research often treats many-body interactions as Hermitian.
  • Nonreciprocity is a key mechanism inducing non-Hermiticity.

Purpose of the Study:

  • To investigate the role of nonreciprocal two-body interactions in many-body systems.
  • To analytically demonstrate how these interactions govern correlated pairs.
  • To experimentally validate predictions in a phononic crystal simulator.

Main Methods:

  • Analytical modeling of nonreciprocal two-body interactions.
  • Experimental implementation using a phononic crystal simulator.
  • Airborne sound measurements to capture emergent phenomena.

Main Results:

  • Demonstrated control over correlated pairs via nonreciprocal interactions.
  • Observed the non-Hermitian inverse skin effect: particles move synchronously as bound pairs against dominant hopping.
  • Observed the time cluster effect: initially separate particles form lasting bound pairs over time.

Conclusions:

  • Nonreciprocal many-body interactions drive unique physical phenomena.
  • Experimental validation in a phononic system confirms theoretical predictions.
  • Opens new avenues for engineering correlated quantum systems.