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Area of Science:

  • Quantum optics
  • Quantum mechanics
  • Photonics

Background:

  • Coherent absorption is a quantum phenomenon.
  • Beam splitters are fundamental optical components.
  • Nonclassical states of light, like NOON states, exhibit unique quantum properties.

Purpose of the Study:

  • To describe coherent absorption at spatially separated beam splitters.
  • To investigate the behavior of nonclassical two-photon NOON states in such a system.
  • To demonstrate nonlocal absorption of a single photon.

Main Methods:

  • Theoretical description of coherent absorption.
  • Analysis of a nonclassical two-photon NOON-state input.
  • Utilizing superposition modes for absorption or transparency.
  • Examining photon survival probability via interference.

Main Results:

  • Coherent absorption can occur at two separate, macroscopic lossy beam splitters.
  • A transparent or absorbed mode can be selected by choosing a superposition mode of any phase.
  • A single photon can survive with certainty from a two-photon NOON-state input.
  • This implies nonlocal absorption of a single photon.

Conclusions:

  • Demonstrates nonlocal absorption of single photons using coherent effects at beam splitters.
  • Highlights the potential for controlling photon behavior in quantum optical systems.
  • Suggests a method for detecting single photons via interference in two-photon survival probability.