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The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In  facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
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Disorder-Robust Entanglement Transport.

Clemens Gneiting1, Daniel Leykam2, Franco Nori1,3

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Summary
This summary is machine-generated.

Disorder affects entangled particles differently based on their coordinates. Relative states are protected by symmetry, while center-of-mass states remain sensitive to dephasing, impacting entanglement detection.

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Area of Science:

  • Quantum physics
  • Condensed matter theory
  • Quantum information science

Background:

  • Disorder-induced dephasing impacts quantum transport.
  • Topological insulators offer platforms for studying quantum phenomena without backscattering.
  • Entangled particles exhibit unique behaviors under environmental perturbations.

Purpose of the Study:

  • Investigate the distinct effects of disorder on the transport of two noninteracting entangled particles.
  • Analyze the role of symmetry in protecting quantum states from dephasing.
  • Clarify the implications for interferometric entanglement detection.

Main Methods:

  • Theoretical analysis of disorder-perturbed transport.
  • Utilizing quantum master equations for disorder-averaged systems.
  • Modeling two-particle states, including N00N states.

Main Results:

  • Center-of-mass and relative coordinates exhibit differential responses to disorder-induced dephasing.
  • Mirror symmetry protects relative states from delocalization, even at high levels.
  • Center-of-mass delocalizations, like N00N states, remain susceptible to disorder.

Conclusions:

  • Symmetry plays a crucial role in preserving quantum correlations against environmental noise.
  • Understanding these differential effects is vital for robust quantum information processing and entanglement detection.
  • The findings are platform-independent, applicable to various quantum systems.