Multipartite Quantum Coherence and Distribution under the Unruh Effect

He, Juan; Ding, Zhiyong; Shi, Jia-Dong; Wu, Tao

doi:10.1002/andp.201800167

Cited by 13 publications

(8 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here they find that compared to entanglement, quantum coherence is more robust to Unruh decoherence. A generalisation of this result to tripartite system was performed by [64]. Both these works consider a massless scalar field.…”

Section: Introductionmentioning

confidence: 85%

See 1 more Smart Citation

Accessible and inaccessible quantum coherence in relativistic quantum systems

Harikrishnan,

Jambulingam,

Rohde

et al. 2021

Preprint

View full text Add to dashboard Cite

The quantum coherence of a multipartite system is investigated when some of the parties are moving with constant acceleration. Due to relativistic motion the quantum coherence is divided into two parts as accessible and inaccessible coherence. First we investigate tripartite systems, considering both GHZ and W-states. We find that the quantum coherence of these states does not vanish in the limit of infinite acceleration, rather asymptoting to a non-zero value. These results hold for both single-and two-qubit relativistic motion. In the GHZ and W states the coherence is distributed as correlations between the qubits and is known as global coherence. But quantum coherence can also exist due to the superposition within a qubit, the local coherence. To study the properties of local coherence we investigate separable state. The GHZ state, W-state and separable states contain only one type of coherence. Next we consider the W W and star states in which both local and global coherences coexist. We find that under relativistic motion both local and global coherence show similar qualitative behaviour. Finally we derive analytic expressions for the quantum coherence of N -partite GHZ and W states where n < N qubits are subject to relativistic motion. We find that the quantum coherence of a multipartite GHZ state falls exponentially with the number of accelerated qubits, whereas for multipartite W-states the quantum coherence decreases only polynomially. We conclude that W-states are more robust to Unruh decoherence and discuss some potential applications in satellite-based quantum communication and black hole physics.

show abstract

Section: Introductionmentioning

confidence: 85%

“…The effect of relativistic motion on quantum coherence has been studied in the following works [62][63][64][65]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Accessible and inaccessible quantum coherence in relativistic quantum systems

Harikrishnan,

Jambulingam,

Rohde

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Recently, different approaches have been employed to study the quantum effects like entanglement, quantum correlations and coherence [29][30][31][32][33][34]. Moreover, the quantum correlation and entropic uncertainty relation are also investigated in a multipartite scenario [35,36].…”

Section: Introductionmentioning

confidence: 99%

Quantum correlations and coherence in a moving Unruh–deWitt detector

Bhuvaneswari¹,

Muthuganesan²,

Radha³

2022

Physica A: Statistical Mechanics and its Applications

View full text Add to dashboard Cite

“…Yuan et al [55] also studied such a problem. Their results are as follows: [56][57][58][59], and R I (Q, ρ) is the coherence of formation [60,61].…”

Section: Linking the Eurs To Quantum Coherencementioning

confidence: 99%

Quantum‐Memory‐Assisted Entropic Uncertainty Relations

Wang

Ming

et al. 2019

Annalen der Physik

View full text Add to dashboard Cite

Uncertainty relations take a crucial and fundamental part in the frame of quantum theory, and are bringing on many marvelous applications in the emerging field of quantum information sciences. Especially, as entropy is imposed into the uncertainty principle, entropy-based uncertainty relations lead to a number of applications including quantum key distribution, entanglement witness, quantum steering, quantum metrology, and quantum teleportation. Herein, the history of the development of the uncertainty relations is discussed, especially focusing on the recent progress with regard to quantum-memory-assisted entropic uncertainty relations and dynamical characteristics of the measured uncertainty in some explicit physical systems. The aims are to help deepen the understanding of entropic uncertainty relations and prompt further explorations for versatile applications of the relations on achieving practical quantum tasks.

show abstract

Multipartite Quantum Coherence and Distribution under the Unruh Effect

Cited by 13 publications

References 53 publications

Accessible and inaccessible quantum coherence in relativistic quantum systems

Accessible and inaccessible quantum coherence in relativistic quantum systems

Quantum correlations and coherence in a moving Unruh–deWitt detector

Quantum‐Memory‐Assisted Entropic Uncertainty Relations

Contact Info

Product

Resources

About