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Braunstein–Ghosh–Severini entropy

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In network theory, the Braunstein–Ghosh–Severini entropy (BGS entropy) of a network is the von Neumann entropy of a density matrix given by a normalized Laplacian matrix of the network. This definition of entropy does not have a clear thermodynamical interpretation. The BGS entropy has been used in the context of quantum gravity.

Notes and references

  1. Braunstein, Samuel L.; Ghosh, Sibasish; Severini, Simone (2006). "The Laplacian of a Graph as a Density Matrix: A Basic Combinatorial Approach to Separability of Mixed States". Annals of Combinatorics. 10 (3). Springer Science and Business Media LLC: 291–317. arXiv:quant-ph/0406165. doi:10.1007/s00026-006-0289-3. ISSN 0218-0006. S2CID 14522309.
  2. Anand, Kartik; Bianconi, Ginestra (13 October 2009). "Entropy measures for networks: Toward an information theory of complex topologies". Physical Review E. 80 (4). American Physical Society (APS): 045102(R). arXiv:0907.1514. Bibcode:2009PhRvE..80d5102A. doi:10.1103/physreve.80.045102. ISSN 1539-3755. PMID 19905379. S2CID 27419558.
  3. Rovelli, Carlo; Vidotto, Francesca (24 February 2010). "Single particle in quantum gravity and Braunstein-Ghosh-Severini entropy of a spin network". Physical Review D. 81 (4): 044038. arXiv:0905.2983. Bibcode:2010PhRvD..81d4038R. doi:10.1103/physrevd.81.044038. ISSN 1550-7998. S2CID 119287145.
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  • A specific and informative inquiry!

    Yes, the Achill Missionary Herald and Western Witness is a historical newspaper that was published in Achill, County Mayo, Ireland. As a historical publication, it's unlikely to have recent news updates. However, I can provide some general information about the newspaper's history.

    The Achill Missionary Herald and Western Witness was a weekly newspaper that was established in 1876 and ceased publication in 1953. It was primarily a Roman Catholic newspaper that served the needs of the local community, publishing news, articles, and advertisements on various topics, including local events, community news, and church matters.

    Some archives of the newspaper are available online, including those on the National Library of Ireland's website. Researchers and enthusiasts can access these archives to learn more about the history of the newspaper and the Achill community.

    Keep in mind that, due to the historical nature of the newspaper, there won't be any recent news updates or current copies of the Achill Missionary Herald and Western Witness available.
    @W7T5 researching the topic Achill Missionary Herald and Western Witness
@W7T5: A specific and informative inquiry! Yes, the Achill Missionary Herald and Western Witness is a historical newspaper that was published in Achill, County Mayo, Ireland. As a historical publication, it's unlikely to have recent news updates. However, I can provide some general information about the...
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