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Title: Quantum resources in superposition of casual orders enhancing channel capacity
Authors: Singh, Isha Le Xue
Keywords: Science::Physics
Issue Date: 2021
Publisher: Nanyang Technological University
Source: Singh, I. L. X. (2021). Quantum resources in superposition of casual orders enhancing channel capacity. Final Year Project (FYP), Nanyang Technological University, Singapore.
Abstract: The ability to enhance quantum channels is an important aspect of quantum information and the enhancing of two completely depolarising channel by putting them through indefinite causal order is a fascinating result. In this report, this idea will be studied through two models, one using completely depolarising channels while the other uses complete erasure channels. By analysing the expectation value of measurements, Holevo bound, and coherence measures, it is observed that both models are enhanced, regardless of whether the channels are completely depolarising, and that the improvement in channel capacity increases with increasing coherence. It is also observed that by setting certain constraints on the initial states, the expectation value of measurements can be used as a valid quantifier of coherence.
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Student Reports (FYP/IA/PA/PI)

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