IDEAS home Printed from https://ideas.repec.org/a/eee/phsmap/v611y2023ics0378437122009852.html
   My bibliography  Save this article

Parameterizing density operators with arbitrary symmetries to gain advantage in quantum state estimation

Author

Listed:
  • Corte, Inés
  • Losada, Marcelo
  • Tielas, Diego
  • Holik, Federico
  • Rebón, Lorena

Abstract

In this work, we show how to parameterize a density matrix that has an arbitrary symmetry, knowing the generators of the Lie algebra (if the symmetry group is a connected Lie group) or the generators of its underlying group (in case it is finite). This allows to pose MaxEnt and MaxLik estimation techniques as convex optimization problems with a substantial reduction in the number of parameters of the function involved. This implies that, apart from a computational advantage due to the fact that the optimization is performed in a reduced space, the amount of experimental data needed for a good estimation of the density matrix can be reduced as well. In addition, we run numerical experiments and apply these parameterizations to estimate quantum states with different symmetries.

Suggested Citation

  • Corte, Inés & Losada, Marcelo & Tielas, Diego & Holik, Federico & Rebón, Lorena, 2023. "Parameterizing density operators with arbitrary symmetries to gain advantage in quantum state estimation," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 611(C).
    • Handle: RePEc:eee:phsmap:v:611:y:2023:i:c:s0378437122009852
    DOI: 10.1016/j.physa.2022.128427
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0378437122009852
    Download Restriction: Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000
    File URL: https://libkey.io/10.1016/j.physa.2022.128427?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Thiago O. Maciel & André T. Cesário & Reinaldo O. Vianna, 2011. "Variational Quantum Tomography With Incomplete Information By Means Of Semidefinite Programs," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 22(12), pages 1361-1372.
    2. Vincenzo D'Ambrosio & Eleonora Nagali & Stephen P. Walborn & Leandro Aolita & Sergei Slussarenko & Lorenzo Marrucci & Fabio Sciarrino, 2012. "Complete experimental toolbox for alignment-free quantum communication," Nature Communications, Nature, vol. 3(1), pages 1-8, January.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.

      Corrections

      All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:phsmap:v:611:y:2023:i:c:s0378437122009852. See general information about how to correct material in RePEc.

      If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

      If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

      If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

      For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/physica-a-statistical-mechpplications/ .

      Please note that corrections may take a couple of weeks to filter through the various RePEc services.

      IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.