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Effective Forces Between Quantum Bound States.

Alexander Rokash1, Evgeny Epelbaum1,2, Hermann Krebs1,2

  • 1Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44870 Bochum, Germany.

Physical Review Letters
|June 24, 2017
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Summary
This summary is machine-generated.

The interactions between alpha particles depend on nucleon-nucleon force details. A simplified model shows that the local part of particle interactions significantly shapes dimer interactions and their effective potential sign.

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Area of Science:

  • Nuclear physics
  • Quantum mechanics
  • Condensed matter physics

Background:

  • Alpha particle interactions are sensitive to nucleon-nucleon force details.
  • Understanding these interactions is crucial for nuclear structure and reactions.

Purpose of the Study:

  • Investigate the essential physics of alpha particle interactions.
  • Simplify complex nuclear interactions using a model system.
  • Determine the role of interaction locality in dimer behavior.

Main Methods:

  • Studied a one-dimensional model of two-component fermions.
  • Probed interactions between two bound dimers.
  • Measured effective dimer potentials using external point potentials (numerical tweezers).

Main Results:

  • The strength and range of local particle-particle interactions are key factors.
  • These local interactions significantly shape dimer-dimer interactions.
  • The sign of the effective potential between dimers can be determined by these interactions.

Conclusions:

  • The simplified model successfully captures essential physics of interaction sensitivity.
  • Local interactions are dominant in determining effective potentials between composite particles.
  • This work provides insights into the fundamental nature of nuclear forces.