Classical Computer Assisted Analysis of Small Multiqudit Systems

Quantum computation model is regarded as a which can overcome barriers in calculations efficiency of problems appear modern science. In spite hardware development, particular recent emergence several different physical installations the pioneering quantum machines, contemporary and numerical analysis concerning computing very important. first part this article, some useful techniques for registers processed by circuits are presented. Applied classical parallel computational utilised to shorten whole time. New methods processing state vectors qudits density matrices presented, indicating operations may be performed context implementation local unitary operations. There also shown, how use reduction operation von Neumann measurement performing measurements on system qudits. addition purely technical results described above, paper includes bunch theoretical substitute solid mathematical ground computations with help routines Section III. particular, discussion general multi-qudit states through prism Entropy Negativity measures entanglement included has been Additionally, notion total introduced. For certain classes popular states, introduced deficits defined have discussed. Gram matrix technique, corresponding analysed computed an explicite way. new AME multiqudit systems V. The last article presents experiments determination values convex combinations GHZ andWstates. Some details nature attached Appendix A.