Gärttner group develops new method for detecting mode entanglement
New preprint by Elena Callus in collaboration with Tobias Haas (Ulm)
Experimental realization of a scheme for detecting entanglement between optical modes
Published:
Revealing entanglement through local features of phase-space distributions
Most quantum system in nature are described by continuous degrees of freedom, like the motion of particles in space, or quantized modes of the electromagnetic field. Detecting entanglement in continuous variable system -- despite being of fundamental interest and technical relevance -- is much less studied than entanglement of qubit systems. In this work we propose a new type of measurement scheme, that relies on observing the system only at localized points in quantum mechanical phase space. We show that this scheme is as powerful as traditional entanglement detection methods and is more capable of detecting entanglement of complicated non-Gaussian states. We also propose an experimental implementation for quantum optical systems.
Link to paper: https://arxiv.org/abs/2602.21688External link