Multiparty entanglement: When everything is connected | University of Amsterdam

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In a multiparty entangled quantum world, everything can be connected. Credit: TheDigitalArtist

Dec. 22, 2020 (Phys.org) -- Entanglement is a ubiquitous concept in modern physics research: it occurs in subjects ranging from quantum gravity to quantum computing.

In a publication that appears in Physical Review Letters, physicist Michael Walter and his collaborator Sepehr Nezami theoretically investigate a rich class of many-body states and their entanglement properties. To this end, they employ a mathematical technique known as a "tensor network."

The researchers show that the geometrical properties of this network provide a host of useful information about the entanglement properties of the states under investigation.

The more detailed understanding of quantum entanglement that the authors obtain could have many future applications.

The research was originally motivated by questions in the search for a better understanding of the quantum properties of gravity, but the technical tools that have been developed are also very useful in the theory of quantum information that is used to develop quantum computers and quantum software.

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