Collective-Mode Enhanced Matter-Wave Optics

Deppner, Christian; Herr, Waldemar; Cornelius, M.; Stromberger, Peter; Sternke, Tammo; Grzeschik, Christoph; Grote, Alexander; Rudolph, Jan; Herrmann, Sven; Krutzik, Markus; Wenzlawski, André; Corgier, Robin; Charron, Eric; Guéry-Odelin, David; Gaaloul, Naceur; Lämmerzahl, Cláus; Peters, Achim; Windpassinger, Patrick; Rasel, Ernst M.

doi:10.1103/physrevlett.127.100401

Cited by 85 publications

(62 citation statements)

References 55 publications

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“…In order to produce such total quantum coherence for Bose gases, a temperature very close to absolute zero had to be sought, and realizing such a low temperature literally consists in removing the heat photons. That is how a Bose–Einstein condensate is manufactured in a laboratory, and right now temperatures are being realized in laboratories of quantum physicists on the surface of planet Earth that are more than ten billion times colder than temperatures at the coldest naturally existing place in the universe, namely the Boomerang Nebula [ 76 ]. At those very low temperatures, where practically all the heat photons have thus been removed, very pure quantum coherence appears to occur.…”

Section: Discussionmentioning

confidence: 99%

Are Words the Quanta of Human Language? Extending the Domain of Quantum Cognition

Aerts¹,

Beltran²

2021

Entropy

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In previous research, we showed that ‘texts that tell a story’ exhibit a statistical structure that is not Maxwell–Boltzmann but Bose–Einstein. Our explanation is that this is due to the presence of ‘indistinguishability’ in human language as a result of the same words in different parts of the story being indistinguishable from one another, in much the same way that ’indistinguishability’ occurs in quantum mechanics, also there leading to the presence of Bose–Einstein rather than Maxwell–Boltzmann as a statistical structure. In the current article, we set out to provide an explanation for this Bose–Einstein statistics in human language. We show that it is the presence of ‘meaning’ in ‘texts that tell a story’ that gives rise to the lack of independence characteristic of Bose–Einstein, and provides conclusive evidence that ‘words can be considered the quanta of human language’, structurally similar to how ‘photons are the quanta of electromagnetic radiation’. Using several studies on entanglement from our Brussels research group, we also show, by introducing the von Neumann entropy for human language, that it is also the presence of ‘meaning’ in texts that makes the entropy of a total text smaller relative to the entropy of the words composing it. We explain how the new insights in this article fit in with the research domain called ‘quantum cognition’, where quantum probability models and quantum vector spaces are used in human cognition, and are also relevant to the use of quantum structures in information retrieval and natural language processing, and how they introduce ‘quantization’ and ‘Bose–Einstein statistics’ as relevant quantum effects there. Inspired by the conceptuality interpretation of quantum mechanics, and relying on the new insights, we put forward hypotheses about the nature of physical reality. In doing so, we note how this new type of decrease in entropy, and its explanation, may be important for the development of quantum thermodynamics. We likewise note how it can also give rise to an original explanatory picture of the nature of physical reality on the surface of planet Earth, in which human culture emerges as a reinforcing continuation of life.

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Section: Discussionmentioning

confidence: 99%

Are Words the Quanta of Human Language? Extending the Domain of Quantum Cognition

Aerts¹,

Beltran²

2021

Entropy

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“…Deployment of these experiments in a microgravity environment would enable both fundamental research and promise enhanced performance for practical applications in navigation and earth observation. In this context, generation and coherent manipulation of cold atom ensembles and Bose-Einstein condensates have already been demonstrated in microgravity environments including orbiting platforms such as parabolic flights [57,58], drop-towers [59,60], sounding rockets [61,62], and now even on Tiangong-2 [63] and the ISS [64]. Further launches to ISS are planned such as the ACES/PHARAO atomic clock [65], or the dual-species atomic experiment facility BECCAL [66].…”

Section: B Laser-cooled Atomic Systemsmentioning

confidence: 99%

Topical White Paper: A Case for Quantum Memories in Space

Gündoğan¹,

Jennewein²,

Asadi³

et al. 2021

Preprint

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“…To this end, the state-of-the-art has been established by sources based on atom chips [7,8] as demonstrated in the scope of compact apparatuses for microgravity experiments [9][10][11][12] and as chosen for current and planned experiments in orbit on the ISS [13,14]. Here, forming traps near the current-conducting structures allows generating strongly confining traps and hence rapid and efficient evaporation.…”

Section: Introductionmentioning

confidence: 99%

Rapid generation of all-optical $^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance

Herbst¹,

Albers²,

Stolzenberg³

et al. 2022

Preprint

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Ultracold potassium is a promising candidate for quantum technological applications as it allows changing intra-atomic interactions via low-field magnetic Feshbach resonances. However, the realization of high-flux sources of Bose-Einstein condensates remains challenging due to the necessity of optical trapping to use a Feshbach resonance. We investigate the production of all-optical 39 K Bose-Einstein condensates under different scattering lengths using a low-field Feshbach resonance near 33 G. By tuning the scattering length in a range between 75 a0 and 300 a0 we demonstrate a trade off between evaporation speed and final atom number and decrease our evaporation time by a factor of 5 while approximately doubling the atomic flux. To this end, we are able to produce fully condensed ensembles with 5 × 10 4 atoms within 850 ms evaporation time at a scattering length of 232 a0 and 1.6 × 10 5 atoms within 4 s at 158 a0, respectively. We analyze the flux scaling with respect to collision rates and describe routes towards high-flux sources of ultra-cold potassium for inertial sensing.

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Collective-Mode Enhanced Matter-Wave Optics

Cited by 85 publications

References 55 publications

Are Words the Quanta of Human Language? Extending the Domain of Quantum Cognition

Are Words the Quanta of Human Language? Extending the Domain of Quantum Cognition

Topical White Paper: A Case for Quantum Memories in Space

Rapid generation of all-optical $^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance

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