# Experimental localisation of quantum entanglement through monitored classical mediator

@article{Pal2021ExperimentalLO, title={Experimental localisation of quantum entanglement through monitored classical mediator}, author={Soham Pal and Priyanka Batra and Tanjung Krisnanda and Tomasz Paterek and T S Mahesh}, journal={Quantum}, year={2021}, volume={5}, pages={478} }

Quantum entanglement is a form of correlation between quantum particles that cannot be increased via local operations and classical communication. It has therefore been proposed that an increment of quantum entanglement between probes interacting solely via mediator implies nonclassicality of the mediator. Indeed, under certain assumptions about the initial state, entanglement gain between the probes indicates quantum coherence in the mediator. Going beyond such assumptions, there exist other… Expand

#### 24 Citations

Objective function maximization by machine learning for gate-model quantum computers

- Engineering, Computer Science
- Defense + Commercial Sensing
- 2020

The method significantly reduces the costs of the objective function estimation and provides an estimate of the new state of the quantum computer, particularly convenient for the performance optimization of experimental gate-model quantum computations. Expand

Signatures of nonclassical effects in tomograms

- Physics
- 2020

The thesis showcases the importance of tomograms in quantifying nonclassical effects such as wavepacket revivals, squeezing, and quantum entanglement in continuous-variable, hybrid quantum, and qubit… Expand

Approximation Method for Optimization Problems in Gate-Model Quantum Computers

- Computer Science
- Chaos, Solitons & Fractals: X
- 2021

The proposed solution optimizes the process of objective function estimation for optimization problems in gate-model quantum computers and quantum devices. Expand

Comment on 'Vindication of entanglement-based witnesses of non-classicality in hybrid systems'

- Physics
- 2021

Models of quantum-classical interactions fall into two classes: those which allow the generation of quantum entanglement via a classical mediator (such as gravity), and those which do not. Marconato… Expand

Constraints on probing quantum coherence to infer gravitational entanglement

- Physics
- 2021

Finding a feasible scheme for testing the quantum mechanical nature of the gravitational interaction has been attracting an increasing level of attention. Gravity mediated entanglement generation so… Expand

Distributed quantum computation for near-term quantum environments

- Engineering, Computer Science
- Defense + Commercial Sensing
- 2021

This work defines a scalable distributed model of gate-model quantum computation in near-term quantum systems that can be scaled up to large-scale quantum computers. Expand

Non-Gaussianity as a Signature of a Quantum Theory of Gravity

- Physics
- 2021

A new signature of quantum gravity, connected to a concept used in the area of quantum computation, may enable a table-top test of quantum gravity using just a single quantum system and without… Expand

Post-processing optimization for continuous-variable quantum key distribution

- Computer Science
- Theor. Comput. Sci.
- 2021

An optimization method for post-processing in continuous-variable quantum key distribution achieves additive Gaussian noise on the random secret for arbitrarily low dimensional blocks and consumes all information from the raw data blocks to provide maximal efficiency and security via standard operations. Expand

Scalable distributed gate-model quantum computers

- Medicine
- Scientific reports
- 2021

It is proved that the proposed architecture can maximize an objective function of a computational problem in a distributed manner and study the impacts of decoherence on distributed objective function evaluation. Expand

A no-go theorem on the nature of the gravitational field beyond quantum theory

- Physics
- 2020

Recently, table-top experiments involving massive quantum systems have been proposed to test the interface of quantum theory and gravity. In particular, the crucial point of the debate is whether it… Expand

#### References

SHOWING 1-10 OF 78 REFERENCES

Phys

- Rev. Lett. 119, 120402
- 2017

Separable States can be used to distribute entanglement.

- Physics, Medicine
- Physical review letters
- 2003

It is shown that two distant particles can be entangled by sending a third particle that is never entangled with the other two, and analogous properties of completely positive maps, in which the composition of two separable maps can create entanglement. Expand

Phys

- Rev. Lett. 88, 017901
- 2001

Distribution of quantum Accepted in Quantum 2021-05-20, click title to verify. Published under CC-BY 4.0

- entanglement: Principles and applications
- 2020

Mesoscopic entanglement through central–potential interactions

- Physics
- 2020

The generation and detection of entanglement between mesoscopic systems would have major fundamental and applicative implications. In this work, we demonstrate the utility of continuous variable… Expand

Nonclassicality of spin structures in condensed matter: An analysis of
Sr14Cu24O41

- Physics
- 2019

When two quantum systems are coupled via a mediator, their dynamics has traces of non-classical properties of the mediator. We show how this observation can be effectively utilised to study the… Expand

Observable quantum entanglement due to gravity

- Physics
- 2019

No experiment to date has provided evidence for quantum features of the gravitational interaction. Recently proposed tests suggest looking for the generation of quantum entanglement between massive… Expand

Push-Pull Optimization of Quantum Controls

- Physics, Computer Science
- ArXiv
- 2019

A stronger objective function which incorporates not only the target operator but also a set of its orthogonal operators is proposed, which finds significantly superior convergence of optimization routines with the combined influences of all the operators. Expand

Quantum resource theories

- Physics
- Reviews of Modern Physics
- 2019

Quantum resource theories (QRTs) offer a highly versatile and powerful framework for studying different phenomena in quantum physics. From quantum entanglement to quantum computation, resource… Expand

and T

- Paterek, arXiv:1906.08808
- 2019