Blar i Institutt for realfag og industrisystemer på forfatter "Loveridge, Leon Deryck"
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Measurement disturbance and conservation laws in quantum mechanics
Mohammady, M. Hamed; Miyadera, Takayuki; Loveridge, Leon Deryck (Peer reviewed; Journal article, 2023)Measurement error and disturbance, in the presence of conservation laws, are analysed in general operational terms. We provide novel quantitative bounds demonstrating necessary conditions under which accurate or non-disturbing ... -
A quantum reference frame size-accuracy trade-off for quantum channels
Miyadera, Takayuki; Loveridge, Leon Deryck (Peer reviewed; Journal article, 2020)The imposition of symmetry upon the nature and structure of quantum observables has recently been extensively studied, with quantum reference frames playing a crucial role. In this paper, we extend this work to quantum ... -
A relational perspective on the Wigner-Araki-Yanase theorem
Loveridge, Leon Deryck (Peer reviewed; Journal article, 2020)We present a novel interpretation of the Wigner-Araki-Yanase (WAY) theorem based on a relational view of quantum mechanics. Several models are analysed in detail, backed up by general considerations, which serve to illustrate ... -
Relative Quantum Time
Loveridge, Leon Deryck; Miyadera, Takayuki (Peer reviewed; Journal article, 2019)The need for a time-shift invariant formulation of quantum theory arises from fundamental symmetry principles as well as heuristic cosmological considerations. Such a description then leaves open the question of how to ...