Explaining recurring maser flares in the ISM through large-scale entangled quantum mechanical states

Rajabi, Fereshteh; Houde, Martin

doi:10.1126/sciadv.1601858

Cited by 25 publications

(36 citation statements)

References 25 publications

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“…As a result molecules contained within a gas act as a unit, as opposed to independent entities, and behave cooperatively in a manner that strongly affects the characteristics of the gas and the radiation emanating from it. As was discussed in (see also Rajabi & Houde 2016a,b;Rajabi & Houde 2017), SR will take place when the following conditions are met: i) the population levels of the relevant molecular transition 1 Dicke's superradiance is a quantum mechanical effect that was introduced by R. H. Dicke in a seminal paper more than 60 years ago (Dicke 1954). This phenomenon should not be confused with "black hole superradiance," which has also been considered within the context of the FRB problem (e.g., Rosa & Kephart 2018;Conlon & Herdeiro 2018).…”

Section: Introductionmentioning

confidence: 78%

“…In previous works on SR, whether dealing with star-forming regions (Rajabi & Houde 2017), the surroundings of evolved stars (Rajabi & Houde 2016b) or FRBs , we consistently focused on situations where SR is initiated when the inversion level is high enough to bring the column density nL of the inverted population (n = N/(AL)) above the critical threshold (nL) crit where the time-scale of SR…”

Section: Resultsmentioning

confidence: 99%

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Triggered superradiance and fast radio bursts

Houde

Rajabi

Gaensler

et al. 2018

Monthly Notices of the Royal Astronomical Society

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In this paper we develop a model for fast radio bursts (FRBs) based on triggered superradiance (SR) and apply it to previously published data of FRB 110220 and FRB 121102. We show how a young pulsar located at ∼ 100 pc or more from an SR/FRB system could initiate the onset of a powerful burst of radiation detectable over cosmological distances. Our models using the OH 2 Π 3/2 (J = 3/2) 1612 MHz and 2 Π 3/2 (J = 5/2) 6030 MHz spectral lines match the light curves well and suggest the entanglement of more than 10 30 initially inverted molecules over lengths of approximately 300 au for a single SR sample. SR also accounts for the observed temporal narrowing of FRB pulses with increasing frequency for FRB 121102, and predicts a scaling of the FRB spectral bandwidth with the frequency of observation, which we found to be consistent with the existing data.

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Section: Introductionmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Triggered superradiance and fast radio bursts

Houde

Rajabi

Gaensler

et al. 2018

Monthly Notices of the Royal Astronomical Society

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“…Hot and dense gas in those shocks can illuminate parts of the disc altering the pumping conditions. Rajabi & Houde (2017) suggested that periodic and seemingly alternating periodic flares in the methanol and water maser lines in G107.298+5.639 can be explained within the context of superradiance theory.…”

Section: Introductionmentioning

confidence: 99%

6.7 GHz variability characteristics of new periodic methanol maser sources

Олеч

Szymczak

Wolak

et al. 2019

Monthly Notices of the Royal Astronomical Society

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Discovery of periodic maser emission was an unexpected result from monitoring observations of methanol transitions in high-mass young stellar objects. We report on the detection of five new periodic sources from a monitoring program with the Torun 32 m telescope. Variability with a period of 149 to 540 d and different patterns from sinusoidal-like to intermittent was displayed. Three dimensional structure of G59.633−0.192 determined from the time delays of burst peaks of the spectral features and high angular resolution map implies that the emission traces a disk. For this source the 6.7 GHz light curve followed the infrared variability supporting a radiative scheme of pumping. An unusual time delay of ∼80 d occurred in G30.400−0.296 could not be explained by the light travel time and may suggest a strong differentiation of physical conditions and excitation in this deeply embedded source. Our observations suggest the intermittent variability may present a simple response of maser medium to the underlying variability induced by the accretion luminosity while other variability patterns may reflect more complex changes in the physical conditions.

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“…Dicke's superradiance (SR; Dicke 1954) has been the subject of intensive research in the physics community for decades (Gross & Haroche 1982;Benedict et al 1996). However, it had remained unknown to the astronomy community until its recent applications to the interstellar medium (ISM) (Rajabi & Houde 2016a,b;Rajabi 2016;Rajabi & Houde 2017). SR, a coherent radiation mechanism, can provide explanation for strong radiation bursts taking place over a wide domain of time-scales ranging from sub-seconds (Mathews 2017;Houde et al 2019;Houde, Mathews & Rajabi 2018) to several years (Rajabi & Houde 2016b).…”

Section: Introductionmentioning

confidence: 99%

New evidence for Dicke’s superradiance in the 6.7 GHz methanol spectral line in the interstellar medium

Rajabi

Houde

Bartkiewicz

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We present new evidence for superradiance in the methanol 6.7 GHz spectral line for three different star-forming regions: S255IR-NIRS3, G24.329+0.144, and Cepheus A. Our analysis shows that some of the flux-density flares exhibiting fast rise times and asymmetric light curves reported in these sources can naturally be explained within the context of superradiance. When a threshold for the inverted population column density is exceeded in a maser-hosting region, the radiation mode switches from one regulated by stimulated emission (maser) to superradiance. Superradiance, as a more efficient energy release mechanism, manifests itself through strong bursts of radiation emanating from spatially compact regions. Elevated inverted population densities and the initiation of superradiance can be due to a change in radiative pumping. Here, we show that an increase in the pump rate and the inverted population density of only a factor of a few results in a significant increase in radiation. While the changes in the pump rate can take place over a few hundred days, the rise in radiation flux density when superradiance is initiated is drastic and happens over a much shorter time-scale.

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Explaining recurring maser flares in the ISM through large-scale entangled quantum mechanical states

Abstract: Simultaneously recurring maser flares from different molecular species in the ISM can be explained with superradiance.

Cited by 25 publications

References 25 publications

Triggered superradiance and fast radio bursts

Triggered superradiance and fast radio bursts

6.7 GHz variability characteristics of new periodic methanol maser sources

New evidence for Dicke’s superradiance in the 6.7 GHz methanol spectral line in the interstellar medium

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