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Area of Science:

  • Quantum physics
  • Condensed matter theory
  • Many-body systems

Background:

  • The skin effect typically causes spatial localization in non-Hermitian systems.
  • Kinetically constrained many-body systems exhibit unique behaviors beyond standard models.

Purpose of the Study:

  • To investigate the manifestation of the skin effect in kinetically constrained many-body systems.
  • To explore the creation of robust non-Hermitian quantum states.

Main Methods:

  • Theoretical analysis of the non-Hermitian Fock skin effect in an asymmetric PXP model.
  • Numerical simulations and proposed experimental realization using optical lattices and quantum processors.

Main Results:

  • The skin effect manifests as dynamical amplification in Fock space, not just spatial localization.
  • Identified non-Hermitian Fock skin effect leading to ergodicity-breaking eigenstates (non-Hermitian quantum scars).
  • These non-Hermitian scars demonstrate enhanced robustness against external disorders.

Conclusions:

  • The Fock skin effect is a novel phenomenon in open quantum systems.
  • This effect provides a pathway to engineer robust non-ergodic states.
  • Experimental and digital simulations confirm the feasibility of realizing non-Hermitian scar enhancement.