Would quantum coherence be increased by curvature effect in de Sitter space?

Wu, Shu-Min; Wang, Chunxu; Liu, Dandan; Huang, Xiao-Li; Zeng, Hao‐Sheng

doi:10.1007/jhep02(2023)115

Cited by 8 publications

(2 citation statements)

References 58 publications

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“…Another goal of our study is to better understand the multiverse through multipartite coherence. According to the string landscape and inflationary cosmology, our universe may not be the only one, but part of the multiverse [41][42][43][44][45]. In the structure of the multiverse model, there may be many causally disconnected de Sitter bubbles (de Sitter universes).…”

Section: N − Nmentioning

confidence: 99%

Curvature-enhanced multipartite coherence in the multiverse*

Wu 吴,

Wang 王,

Wang 王

et al. 2024

Chinese Phys. C

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Here, we study quantum coherence of N-partite GHZ (Greenberger-Horne-Zeilinger) and W states in themultiverse consisting of N causally disconnected de Sitter spaces. Interestingly, N-partite coherence in-creases monotonically as the curvature increases, while the curvature effect destroys quantum entanglementand discord, meaning that the curvature effect is beneficial to quantum coherence and harmful to quantumcorrelations in the multiverse. We find that, with the increase of n expanding de Sitter spaces, N-partitecoherence of GHZ state increases monotonically for any curvature, while quantum coherence of the W statedecreases or increases monotonically depending on the curvature. We find a distribution relationship, whichindicates that the correlated coherence of N-partite W state is equal to the sum of all bipartite correlated coherence in the multiverse. Multipartite coherence exhibits unique properties in the multiverse, which argues that it may provide some evidence for the existence of the multiverse.

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Section: N − Nmentioning

confidence: 99%

Curvature-enhanced multipartite coherence in the multiverse*

Wu 吴,

Wang 王,

Wang 王

et al. 2024

Chinese Phys. C

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“…Since quantum correlation has significant potential applications in quantum information processing, some works focus on exploring quantum correlation under the various decoherence environments and physical systems [31][32][33][34][35][36][37]. More recently, with the development of relativistic quantum information [38], much attention has been paid to quantum information theory in curved space-time, such as quantum entanglement, quantum discord, quantum uncertainty relations, quantum coherence, and quantum parameter estimation [39][40][41][42][43][44][45][46][47][48][49][50][51][52]. These investigations in the framework of black holes can not only deepen the understanding of quantum information theory, but also provide potential applications for quantum information processing in curved space-time.…”

Section: Introductionmentioning

confidence: 99%

Nonlocal advantage of quantum coherence under Garfinkle-Horowitz-Strominger dilation space-time

Ming,

Fang,

et al. 2024

Phys. Scr.

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Nonlocal advantage of quantum coherence (NA-QC) is a relatively robust non-classical correlation and can be achieved by coherence complementary relations. In this work, we investigate NA-QC based on various coherence measures within the theoretical framework of a Garﬁnkle-Horowitz-Strominger dilation black hole. Interestingly, NA-QC exhibits monotonically decreasing evolutionary features with the growing dilation parameter in the physically accessible regions. Furthermore, the hierarchical relationship among NA-QC, quantum steerability and Bell-nonlocality is analyzed under the inﬂuence of Hawking radiation. It is shown that NA-QC is a subset of Bell-nonlocality and quantum steering is a superset of Bell-nonlocality. Additionally, to achieve more quantum resources, we propose a feasible physical scheme to control NA-QC by using optimal parity-time (PT )-symmetric operations. The amount of NA-QC can be eﬀectively enhanced in the certain time interval for the physical accessible state in the context of black hole. These results might play important roles for understanding quantum information theory under the curved space-time.

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Bosonic and fermionic coherence of N-partite states in the background of a dilaton black hole

Li,

2024

J. High Energ. Phys.

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We study the N-partite coherences of GHZ and W states for free bosonic and fermionic fields when any n observers hover near the event horizon of a Garfinkle-Horowitz-Strominger (GHS) dilaton black hole. We derive the more general analytical expressions for N-partite coherence, encompassing both physically accessible and inaccessible coherences in the context of the dilaton black hole. It has been found that the coherence of the bosonic field is greater than that of the fermionic field, while the entanglement of the fermionic field is greater than that of the bosonic field in dilaton spacetime. Additionally, the coherence of the W state is greater than that of the GHZ state, whereas the entanglement of the GHZ state is greater than that of the W state in curved spacetime. These results suggest that we should utilize suitable quantum resources and different types of particles for relativistic quantum information tasks.

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Would quantum coherence be increased by curvature effect in de Sitter space?

Cited by 8 publications

References 58 publications

Curvature-enhanced multipartite coherence in the multiverse*

Curvature-enhanced multipartite coherence in the multiverse*

Nonlocal advantage of quantum coherence under Garfinkle-Horowitz-Strominger dilation space-time

Bosonic and fermionic coherence of N-partite states in the background of a dilaton black hole

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