“…2 and 3 that quantum coherence measured by the relative entropy of coherence fall faster than the same measured by the norm of coherence, which is similar to the results of Ref. 20 . Figure 4 (Color online) Comparison between quantum coherence, i.e., ( a ) and ( b ), for the case of with the presence of boundary (the top yellow surface) and the case of without a boundary (the bottom blue surface), with .…”
Section: Quantum Coherence Of a Circularly Accelerated Atom Near A Co...supporting
confidence: 87%
“… 17 – 20 , the norm of coherence acts as a good quantifier which captures the wave nature of a quanton in a multipath quantum interference scenario and it could be possible to experimentally detectable. Moreover, the relative entropy of coherence denotes the optimal rate of the distilled maximally coherent states that can be transformed by incoherent operations as the number of copies goes to infinity 20 , 21 . Recently, a lot of attentions have been focused on the research of resource theory of coherence, and this resource has been applied to various fields 22 , 23 .…”
We investigate, in the paradigm of open quantum systems, the dynamics of quantum coherence of a circularly accelerated atom coupled to a bath of vacuum fluctuating massless scalar field in a spacetime with a reflecting boundary. The master equation that governs the system evolution is derived. Our results show that in the case without a boundary, the vacuum fluctuations and centripetal acceleration will always cause the quantum coherence to decrease. However, with the presence of a boundary, the quantum fluctuations of the scalar field are modified, which makes that quantum coherence could be enhanced as compared to that in the case without a boundary. Particularly, when the atom is very close to the boundary, although the atom still interacts with the environment, it behaves as if it were a closed system and quantum coherence can be shielded from the effect of the vacuum fluctuating scalar field.
“…2 and 3 that quantum coherence measured by the relative entropy of coherence fall faster than the same measured by the norm of coherence, which is similar to the results of Ref. 20 . Figure 4 (Color online) Comparison between quantum coherence, i.e., ( a ) and ( b ), for the case of with the presence of boundary (the top yellow surface) and the case of without a boundary (the bottom blue surface), with .…”
Section: Quantum Coherence Of a Circularly Accelerated Atom Near A Co...supporting
confidence: 87%
“… 17 – 20 , the norm of coherence acts as a good quantifier which captures the wave nature of a quanton in a multipath quantum interference scenario and it could be possible to experimentally detectable. Moreover, the relative entropy of coherence denotes the optimal rate of the distilled maximally coherent states that can be transformed by incoherent operations as the number of copies goes to infinity 20 , 21 . Recently, a lot of attentions have been focused on the research of resource theory of coherence, and this resource has been applied to various fields 22 , 23 .…”
We investigate, in the paradigm of open quantum systems, the dynamics of quantum coherence of a circularly accelerated atom coupled to a bath of vacuum fluctuating massless scalar field in a spacetime with a reflecting boundary. The master equation that governs the system evolution is derived. Our results show that in the case without a boundary, the vacuum fluctuations and centripetal acceleration will always cause the quantum coherence to decrease. However, with the presence of a boundary, the quantum fluctuations of the scalar field are modified, which makes that quantum coherence could be enhanced as compared to that in the case without a boundary. Particularly, when the atom is very close to the boundary, although the atom still interacts with the environment, it behaves as if it were a closed system and quantum coherence can be shielded from the effect of the vacuum fluctuating scalar field.
“…Furthermore, for qubit mixed states, we show that there are coherence measures, such as the relative entropy of coherence, that admit incomparable isocoherent states. In this way, our work complements other works [14][15][16][17][18][19][20] about ordering of quantum states with coherence.…”
supporting
confidence: 61%
“…This result motivates the comparison among other total orders induced by different coherence measures (see e.g. [15][16][17][18][19][20].…”
supporting
confidence: 56%
“…This result motivates the comparison among other total orders induced by different coherence measures (see e.g. [15][16][17][18][19][20].In this work, we address a related but different problem concerning the ordering of quantum states with respect to coherence. In particular, we focus on quantum states with a fixed value of coherence and we ask for their coherence resource power in terms of the preorder induced by the incoherent operations.…”
In this manuscript, universal quantum teleportation in the presence of memory or memory‐less dynamics with applications of partial collapse measurement operators is analyzed. These results show that the combined effects of memory or non‐Markovianity, and weak measurements can lead to universal quantum teleportation (UQT). This study involves noise models of physical importance having characteristic Markovian and non‐Markovian regions, allowing one to observe a transition in quantum properties as one switches from non‐Markovian to Markovian dynamics. For this, the effects of different types of non‐Markovianity are characterized for efficient UQT, both due to the retention of correlations for a longer duration and due to information backflow. The memory effects arising from a correlated channel with or without weak measurements are analyzed further. Interestingly, this analysis for a correlated amplitude damping channel shows that memory effects are of significant advantage in minimizing the fidelity deviation. The presence of weak measurements further enhances the realization of UQT in the presence of memory. The ability of memory effects to achieve zero fidelity deviation at non‐zero time is interesting and of experimental importance.
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