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Related Experiment Video

Updated: Sep 13, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Pseudoentanglement from Tensor Networks.

Zihan Cheng1, Xiaozhou Feng1, Matteo Ippoliti1

  • 1The University of Texas at Austin, Department of Physics, Austin, Texas 78712, USA.

Physical Review Letters
|July 31, 2025
PubMed
Summary
This summary is machine-generated.

New pseudoentangled states are constructed using pseudorandom tensor networks, offering greater flexibility in hiding entanglement structures. This advances quantum information science by enabling novel state constructions with tunable entanglement properties.

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Area of Science:

  • Quantum Information Science
  • Quantum Entanglement Theory
  • Condensed Matter Physics

Background:

  • Pseudoentangled states are quantum states that mask their entanglement, appearing random to limited observers.
  • Existing methods for creating pseudoentangled states have limitations in the types of entanglement structures they can conceal.

Purpose of the Study:

  • To introduce novel constructions of pseudoentangled states with enhanced flexibility in achievable entanglement structures.
  • To explore the application of these constructions in quantum information and holographic contexts.

Main Methods:

  • Utilizing pseudorandom tensor networks for constructing pseudoentangled states.
  • Illustrating the construction with matrix product states and staircase circuits of pseudorandom unitary gates.
  • Generalizing the construction to arbitrary isometric tensor network structures.

Main Results:

  • Demonstrated new constructions of pseudoentangled states with greater control over entanglement properties.
  • Showcased pseudo-area-law scaling of entanglement in a one-dimensional matrix product state example.
  • Constructed pseudoentangled holographic states whose entanglement entropy follows the Ryu-Takayanagi minimum-cut formula.

Conclusions:

  • The developed tensor network approach significantly expands the possibilities for creating pseudoentangled states.
  • This work provides a method for constructing holographic states with specific entanglement properties, addressing open questions in the field.