Abstract:
:Quantum measurement is a fundamental cornerstone of experimental quantum computations. The main issues in current quantum measurement strategies are the high number of measurement rounds to determine a global optimal measurement output and the low success probability of finding a global optimal measurement output. Each measurement round requires preparing the quantum system and applying quantum operations and measurements with high-precision control in the physical layer. These issues result in extremely high-cost measurements with a low probability of success at the end of the measurement rounds. Here, we define a novel measurement for quantum computations called dense quantum measurement. The dense measurement strategy aims at fixing the main drawbacks of standard quantum measurements by achieving a significant reduction in the number of necessary measurement rounds and by radically improving the success probabilities of finding global optimal outputs. We provide application scenarios for quantum circuits with arbitrary unitary sequences, and prove that dense measurement theory provides an experimentally implementable solution for gate-model quantum computer architectures.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Gyongyosi L,Imre Sdoi
10.1038/s41598-019-43250-2subject
Has Abstractpub_date
2019-05-01 00:00:00pages
6755issue
1issn
2045-2322pii
10.1038/s41598-019-43250-2journal_volume
9pub_type
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