Imaging Bell-type nonlocal behavior

Moreau, Paul-Antoine; Toninelli, Ermes; Gregory, Thomas; Aspden, Reuben S.; Morris, Peter A.; Padgett, Miles J.

doi:10.1126/sciadv.aaw2563

Cited by 54 publications

(34 citation statements)

References 47 publications

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“…With John Bell's work in 1964 [51] preparing the theoretical ground and Alain Aspect [52] confirming entanglement experimentally. This was demonstrated recently when two entangled photons were sent along very different routes towards an identical end target and both still reached at the same time [53] . Recently, satellite-based entanglement distribution to receiver stations separated by more than 1200 km was demonstrated, with these results being heralded as holding promise for the possibility of a future global quantum communication network [17] .…”

Section: Key Concepts In Quantum Physicsmentioning

confidence: 75%

Quantum Biology: Does quantum physics hold the key to revolutionizing medicine?

Goh¹,

Tong²,

Pusparajah³

2020

Prog Drug Discov Biomed Sci

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Quantum biology is the study of quantum effects on biochemical mechanisms and biological function. Quantum physics describes the behaviour of the nanoscale particles that make up all matter including living organisms, but it was generally believed that the ‘warm, wet and noisy environment’ in living organisms would result in decoherence making it impossible for meaningful quantum effects to occur. However, there is now a substantial body of work supporting that nature has actually adapted in such a way as to exploit quantum properties to enhance cellular functioning and is believed to have role in a diverse range of key processes in living organisms ranging from maintaining the stability of DNA to neuron function to conscious cognition; from light harvesting in photosynthesis to avian magnetic field based navigation. This review aims to summarize the various mechanisms and functions in living organisms believed to utilize quantum mechanics to purposefully and effectively enhance their performance, and to explore the potential this could hold in diagnosing and treating various medical conditions.

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Section: Key Concepts In Quantum Physicsmentioning

confidence: 75%

Quantum Biology: Does quantum physics hold the key to revolutionizing medicine?

Goh¹,

Tong²,

Pusparajah³

2020

Prog Drug Discov Biomed Sci

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“…While wave-particle duality is expected for single quantum particles, our experiment represents the first 2D mapping of such behavior. In our case, instead of a double slit or single particle splitting, we observe the interference effect on multiple path-scattering propagation of a single particle impinging on an obstacle smaller than the wavepacket size, providing direct imaging of the wave-particle duality of these light-matter excitations 31 .…”

Section: Introductionmentioning

confidence: 81%

Quantum hydrodynamics of a single particle

et al. 2020

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Semiconductor devices are strong competitors in the race for the development of quantum computational systems. In this work, we interface two semiconductor building blocks of different dimensionalities with complementary properties: (1) a quantum dot hosting a single exciton and acting as a nearly ideal single-photon emitter and (2) a quantum well in a 2D microcavity sustaining polaritons, which are known for their strong interactions and unique hydrodynamic properties, including ultrafast real-time monitoring of their propagation and phase mapping. In the present experiment, we can thus observe how the injected single particles propagate and evolve inside the microcavity, giving rise to hydrodynamic features typical of macroscopic systems despite their genuine intrinsic quantum nature. In the presence of a structural defect, we observe the celebrated quantum interference of a single particle that produces fringes reminiscent of wave propagation. While this behavior could be theoretically expected, our imaging of such an interference pattern, together with a measurement of antibunching, constitutes the first demonstration of spatial mapping of the self-interference of a single quantum particle impinging on an obstacle.

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“…It's also been used to quantify the entanglement between two subsystems in quantum physics (Preskill, 2018), which occurs when two (or more) particles become inextricably linked. The entanglement of two photons can be verified using specific visualizations of the spatial correlations and momentum correlations (Moreau et al, 2019). In this case, the visualization provides a clue to how linked (entangled or mixed) two systems (or particles) are.…”

Section: The Entropy Fit Indices: Properties and Estimationmentioning

confidence: 99%

Entropy Fit Indices: New Fit Measures for Assessing the Structure and Dimensionality of Multiple Latent Variables

Golino

Moulder

Shi

et al. 2020

Multivariate Behavioral Research

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The accurate identification of the content and number of latent factors underlying multivariate data is an important endeavor in many areas of Psychology and related fields. Recently, a new dimensionality assessment technique based on network psychometrics was proposed (Exploratory Graph Analysis, EGA), but a measure to check the fit of the dimensionality structure to the data estimated via EGA is still lacking. Although traditional factor-analytic fit measures are widespread, recent research has identified limitations for their effectiveness in categorical variables. Here, we propose three new fit measures (termed entropy fit indices) that combines information theory, quantum information theory and structural analysis: Entropy Fit Index (EFI), EFI with Von Neumman Entropy (EFI.vn) and Total EFI.vn (TEFI.vn). The first can be estimated in complete datasets using Shannon entropy, while EFI.vn and TEFI.vn can be estimated in correlation matrices using quantum information metrics. We show, through several simulations, that TEFI.vn, EFI.vn and EFI are as accurate or more accurate than traditional fit measures when identifying the number of simulated latent factors. However, in conditions where more factors are extracted than the number of factors simulated, only TEFI.vn presents a very high accuracy. In addition, we provide an applied example that demonstrates how the new fit measures can be used with a real-world dataset, using exploratory graph analysis.

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Imaging Bell-type nonlocal behavior

Cited by 54 publications

References 47 publications

Quantum Biology: Does quantum physics hold the key to revolutionizing medicine?

Quantum Biology: Does quantum physics hold the key to revolutionizing medicine?

Quantum hydrodynamics of a single particle

Entropy Fit Indices: New Fit Measures for Assessing the Structure and Dimensionality of Multiple Latent Variables

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