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Updated: Sep 30, 2025
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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A flying Schrödinger's cat in multipartite entangled states
Zhiling Wang1, Zenghui Bao1, Yukai Wu1
1Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, PR China.
Science Advances
|March 11, 2022
Summary
Researchers created multipartite Schrödinger
Area of Science:
- Quantum physics
- Quantum information science
Background:
- Schrödinger's cat thought experiment explores quantum superposition.
- Multipartite cat states demonstrate quantum entanglement in macroscopic objects.
Purpose of the Study:
- To present a scalable method for creating flying multipartite Schrödinger's cat states.
- To confirm quantum entanglement in these states and explore hybrid entanglement.
Main Methods:
- Utilizing a superconducting qubit in a microwave cavity.
- Reflecting coherent-state photons to generate cat states.
- Performing quantum state tomography on photonic modes.
Main Results:
- Successfully created flying multipartite Schrödinger's cat states.
- Confirmed quantum entanglement among up to four photonic modes.
- Witnessed hybrid entanglement between discrete and continuous variables.
Conclusions:
- The developed method is scalable and deterministic.
- Enables quantum metrology and information processing protocols using cat states.
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