Quantum decoherence and relaxation in neutrinos using long-baseline data

Gomes, A. L. G.; Gomes, R. A.; Peres, O. L. G.

doi:10.48550/arxiv.2001.09250

Cited by 15 publications

(27 citation statements)

References 59 publications

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“…For energy-enhanced (n < 0) scenarios, the best limits to date were obtained using MINOS (long baseline accelerator) [1400] and KamLAND (reactor) [1401] data, although these are generally less amenable to QG motivated explanations (although such cases can result from lightcone fluctuations due to the neutrino oscillation wavelength dependence). Constraints have also been derived from MINOS and T2K long baseline accelerator data [1402] and from NOνA and T2K [1403].…”

Section: Neutrino Decoherencementioning

confidence: 99%

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Addazi,

Alvarez-Muniz,

Batista

et al. 2021

Preprint

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The exploration of the universe has recently entered a new era thanks to the multi-messenger paradigm, characterized by a continuous increase in the quantity and quality of experimental data that is obtained by the detection of the various cosmic messengers (photons, neutrinos, cosmic rays and gravitational waves) from numerous origins. They give us information about their sources in the universe and the properties of the intergalactic medium. Moreover, multi-messenger astronomy opens up the possibility to search for phenomenological signatures of quantum gravity. On the one hand, the most energetic events allow us to test our physical theories at energy regimes which are not directly accessible in accelerators; on the other hand, tiny effects in the propagation of very high energy particles could be amplified by cosmological distances. After decades of merely theoretical investigations, the possibility of obtaining phenomenological indications of Planck-scale effects is a revolutionary step in the quest for a quantum theory of gravity, but it requires cooperation between different communities of physicists (both theoretical and experimental). This review, prepared within the COST Action CA18108 "Quantum gravity phenomenology in the multi-messenger approach", is aimed at promoting this cooperation by giving a state-of-the art account of the interdisciplinary expertise that is needed in the effective search of quantum gravity footprints in the production, propagation and detection of cosmic messengers.

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Section: Neutrino Decoherencementioning

confidence: 99%

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Addazi,

Alvarez-Muniz,

Batista

et al. 2021

Preprint

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“…when coherence is completely lost at large distances) is the average of the unfluctuated oscillations, given by P αβ = j |U αj | 2 |U βj | 2 . This is distinct from socalled relaxation scenarios [36,37] where the limiting case is equal populations of all flavors, as was identified in our previous work for certain ν-VBH interaction models [28]. Differences in these large L limits can in principal be used to distinguish between decoherence scenarios should a signal be detected.…”

Section: Simulating Neutrinos Propagating In Fluctuating Space-timementioning

confidence: 55%

Neutrino signals of lightcone fluctuations resulting from fluctuating space-time

Stuttard

2021

Preprint

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One of the most common expectations of a quantum theory of gravity is that space-time is uncertain or fluctuating at microscopic scales, making it a stochastic medium for particle propagation. Particles traversing this space-time may experience fluctuations in travel times or velocities, together referred to as lightcone fluctuations, with even very small effects potentially accumulating into observable signals over large distances. In this work we present a heuristic model of lightcone fluctuations and study the resulting modifications to neutrino propagation, including neutrino decoherence and arrival time spread. We show the expected scale of such effects due to 'natural' Planck scale physics and consider how they may be observed in neutrino detectors, and compare the potential of neutrinos to γ-ray astronomy. Using simulations of neutrino mass states propagating in a fluctuating environment, we determine an analytic decoherence operator in the framework of open quantum systems to quantitatively evaluate neutrino decoherence resulting from lightcone fluctuations, allowing experimental constraints on neutrino decoherence to be connected to Planck scale fluctuations in space-time and γ-ray results.

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“…These models include quantum decoherence (QD), neutrino absorption, 𝜈 3 decay, and wave packet decoherence (WPD). The new physics models of types (1) - (5) in Table 1 are expressed as power-law dependencies of the exponential form, i.e., exp(−𝛼𝐿𝐸 𝑛 ) with n=0, ±1, and ±2 [8][9][10][11][12][13][14][15][16][17][18]. Specifically, the models of types (1), (2), and (3) (𝑛 = −2, 0, and 2) are used to study QD in neutrino oscillations, which may be induced by couplings between the neutrino system and the environment, e.g., quantum gravity or space-time "foam" [6,9,10].…”

Section: Damping Signatures From New Physics Modelsmentioning

confidence: 99%

Damping signatures at JUNO, a medium-baseline reactor neutrino oscillation experiment

Wang,

Liao,

Wang

et al. 2021

Preprint

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We study damping signatures at the Jiangmen Underground Neutrino Observatory (JUNO), a medium-baseline reactor neutrino oscillation experiment. These damping signatures are motivated by various new physics models, including quantum decoherence, 𝜈 3 decay, neutrino absorption, and wave packet decoherence. The phenomenological effects of these models can be characterized by exponential damping factors at the probability level. We assess how well JUNO can constrain these damping parameters and how to disentangle these different damping signatures at JUNO. Compared to current experimental limits, JUNO can significantly improve the limits on 𝜏 3 /𝑚 3 in the 𝜈 3 decay model, the width of the neutrino wave packet 𝜎 𝑥 , and the intrinsic relative dispersion of neutrino momentum 𝜎 rel .

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Quantum decoherence and relaxation in neutrinos using long-baseline data

Cited by 15 publications

References 59 publications

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Neutrino signals of lightcone fluctuations resulting from fluctuating space-time

Damping signatures at JUNO, a medium-baseline reactor neutrino oscillation experiment

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