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Researchers demonstrate novel photonic circuits that combine unitary and diffusive light propagation for advanced coherent light control. These systems enable optical equalization and distribution, with potential applications in quantum thermodynamics and flat-band lattices.

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Area of Science:

  • Quantum optics
  • Photonic systems
  • Condensed matter physics

Background:

  • Photonic circuits typically exhibit unitary light propagation, transferring energy reversibly between channels.
  • Diffusive propagation involves chaotic light scattering and loss of coherence.
  • Open quantum systems dynamics offer a framework to combine these seemingly opposite behaviors.

Purpose of the Study:

  • To experimentally demonstrate novel photonic structures that integrate unitary and diffusive light dynamics.
  • To explore the capabilities of these structures for coherent light control.
  • To investigate their potential in optical equalization, light distribution, and quantum thermodynamics.

Main Methods:

  • Experimental realization of photonic structures with dissipative coupling between modes via a common reservoir.
  • Utilizing open quantum systems principles to analyze light propagation dynamics.
  • Investigating lattice structures for localized stationary states.

Main Results:

  • Demonstrated experimental control over light propagation by combining unitary and diffusive dynamics.
  • Showcased the system's ability to perform optical equalization, smoothing multimode light.
  • Confirmed the system's function as a distributor, guiding light into selected channels.
  • Established the system's role as catalytic coherent reservoirs capable of perfect non-Landauer erasure.
  • Observed localized stationary states in lattice structures, analogous to compacton-like states.

Conclusions:

  • The integration of unitary and diffusive dynamics in photonic circuits opens new avenues for coherent light control.
  • These systems offer practical applications in optical signal processing and quantum information science.
  • The findings contribute to the understanding of light-matter interactions in complex photonic systems.