On the Validity of Intermediate Tracing in Multiple Quantum Interactions
Reuven Ianconescu1,2,*, Bin Zhang1,3, Aharon Friedman4, Jacob Scheuer1,5, Avraham Gover1,5
Journal of Quantum Computing, Vol.8, pp. 1-11, 2026, DOI:10.32604/jqc.2026.076154
- 27 February 2026
Abstract Interactions between many (initially separate) quantum systems raise the question on how to prepare and how to compute the measurable results of their interaction. When one prepares each system individually and let them interact, one has to tensor multiply their density matrices and apply Hamiltonians on the composite system (i.e., the system which includes all the interacting systems) for definite time intervals. Evaluating the final state of one of the systems after multiple consecutive interactions requires tracing all other systems out of the composite system, which may grow to immense dimensions. For computational efficiency during… More >
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