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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Quantum entanglement

Background:

  • Persistent currents in quantum rings are fundamental to quantum electronics.
  • The influence of non-classical magnetic flux on quantum systems is an active area of research.
  • Understanding fermion-fermion interactions is key to predicting quantum phenomena.

Purpose of the Study:

  • To investigate the impact of non-classical magnetic flux on persistent currents in a quantum ring.
  • To analyze how Coulomb interactions between spin-less fermions affect quantum entanglement between the ring and the magnetic field.
  • To determine the conditions under which fermion-fermion interactions are necessary for ring-field entanglement.

Main Methods:

  • Theoretical modeling of a quantum ring with interacting spin-less fermions.
  • Analysis of persistent current generation under a combined static and non-classical magnetic flux.
  • Quantum entanglement measures to quantify the ring-field interaction.

Main Results:

  • The persistent current is modulated by the non-classical component of the magnetic flux.
  • Coulomb interaction plays a significant role in the entanglement dynamics.
  • Fermion-fermion interaction is shown to be a necessary condition for ring-field entanglement in the absence of decoherence.

Conclusions:

  • Quantum ring systems with interacting fermions offer a platform to study complex quantum phenomena.
  • Non-classical magnetic flux can be utilized to control quantum currents and entanglement.
  • The interplay between interactions and external fields is critical for achieving robust quantum entanglement.