Resumo – Publicações

Quantifying quantum reference frames in composed systems: local, global, and mutual asymmetries.
MARTINELLI, Tiago; PINTO, Diogo de Oliveira Soares.
Abstract: The Page-Wootters mechanism questioned the fundamental nature of time in quantum physics. The mechanism explored the notion that a given physical quantity is always defined and measured relative to a reference frame, in general, not explained in the theoretical description of quantum physical experiments. Recently, the resource theory of asymmetry deals explicitly with the physical conditions necessary for a quantum system to serve as a good reference frame. Nonetheless, to quantify a quantum reference frame in relation to another one, it is important to establish an internal description of quantum theory, i.e., without the need for a classical reference frame. In this work, we address this issue with the concept of mutual asymmetry and use this machinery in the Page-Wootters mechanism by identifying the concept of mutual asymmetry as mutual or internal coherence. To do so, the notion of quantum coherence in relation to a quantum reference frame is revisited and a quantifier is proposed in this scenario. Also, this opens space to investigate the link of internal coherence and correlations, as proposed by Page and Wootters, under a resource theory approach.
Physical Review A
v. 99, n. 4, p. 042124-1-042124-10 - Ano: 2019
Fator de Impacto: 2,909
http://dx.doi.org/10.1103/PhysRevA.99.042124
    @article={002943018,author = {MARTINELLI, Tiago; PINTO, Diogo de Oliveira Soares.},title={Quantifying quantum reference frames in composed systems: local, global, and mutual asymmetries},journal={Physical Review A},note={v. 99, n. 4, p. 042124-1-042124-10},year={2019}}