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AC Josephson effect between two superfluid time crystals

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AC Josephson effect between two superfluid time crystals. / Autti, S.; Heikkinen, P.J.; Mäkinen, J.T. et al.
In: Nature Materials, Vol. 20, 01.02.2021, p. 171–174.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Autti, S, Heikkinen, PJ, Mäkinen, JT, Volovik, GE, Zavjalov, VV & Eltsov, VB 2021, 'AC Josephson effect between two superfluid time crystals', Nature Materials, vol. 20, pp. 171–174. https://doi.org/10.1038/s41563-020-0780-y

APA

Autti, S., Heikkinen, P. J., Mäkinen, J. T., Volovik, G. E., Zavjalov, V. V., & Eltsov, V. B. (2021). AC Josephson effect between two superfluid time crystals. Nature Materials, 20, 171–174. https://doi.org/10.1038/s41563-020-0780-y

Vancouver

Autti S, Heikkinen PJ, Mäkinen JT, Volovik GE, Zavjalov VV, Eltsov VB. AC Josephson effect between two superfluid time crystals. Nature Materials. 2021 Feb 1;20:171–174. Epub 2020 Aug 17. doi: 10.1038/s41563-020-0780-y

Author

Autti, S. ; Heikkinen, P.J. ; Mäkinen, J.T. et al. / AC Josephson effect between two superfluid time crystals. In: Nature Materials. 2021 ; Vol. 20. pp. 171–174.

Bibtex

@article{f534aebda6bd4531a1665addd466ac68,
title = "AC Josephson effect between two superfluid time crystals",
abstract = "Quantum time crystals are systems characterized by spontaneously emerging periodic order in the time domain1. While originally a phase of broken time translation symmetry was a mere speculation, a wide range of time crystals has been reported. However, the dynamics and interactions between such systems have not been investigated experimentally. Here we study two adjacent quantum time crystals realized by two magnon condensates in superfluid 3He-B. We observe an exchange of magnons between the time crystals leading to opposite-phase oscillations in their populations—a signature of the AC Josephson effect6—while the defining periodic motion remains phase coherent throughout the experiment. Our results demonstrate that time crystals obey the general dynamics of quantum mechanics and offer a basis to further investigate the fundamental properties of these phases, opening pathways for possible applications in developing fields, such as quantum information processing. {\textcopyright} 2020, The Author(s), under exclusive licence to Springer Nature Limited.",
keywords = "Crystals, Josephson junction devices, Quantum optics, Ac Josephson effect, Fundamental properties, General dynamics, Periodic motion, Periodic ordering, Phase oscillation, Quantum-information processing, Translation symmetry, Crystal symmetry",
author = "S. Autti and P.J. Heikkinen and J.T. M{\"a}kinen and G.E. Volovik and V.V. Zavjalov and V.B. Eltsov",
year = "2021",
month = feb,
day = "1",
doi = "10.1038/s41563-020-0780-y",
language = "English",
volume = "20",
pages = "171–174",
journal = "Nature Materials",
issn = "1476-1122",
publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - AC Josephson effect between two superfluid time crystals

AU - Autti, S.

AU - Heikkinen, P.J.

AU - Mäkinen, J.T.

AU - Volovik, G.E.

AU - Zavjalov, V.V.

AU - Eltsov, V.B.

PY - 2021/2/1

Y1 - 2021/2/1

N2 - Quantum time crystals are systems characterized by spontaneously emerging periodic order in the time domain1. While originally a phase of broken time translation symmetry was a mere speculation, a wide range of time crystals has been reported. However, the dynamics and interactions between such systems have not been investigated experimentally. Here we study two adjacent quantum time crystals realized by two magnon condensates in superfluid 3He-B. We observe an exchange of magnons between the time crystals leading to opposite-phase oscillations in their populations—a signature of the AC Josephson effect6—while the defining periodic motion remains phase coherent throughout the experiment. Our results demonstrate that time crystals obey the general dynamics of quantum mechanics and offer a basis to further investigate the fundamental properties of these phases, opening pathways for possible applications in developing fields, such as quantum information processing. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.

AB - Quantum time crystals are systems characterized by spontaneously emerging periodic order in the time domain1. While originally a phase of broken time translation symmetry was a mere speculation, a wide range of time crystals has been reported. However, the dynamics and interactions between such systems have not been investigated experimentally. Here we study two adjacent quantum time crystals realized by two magnon condensates in superfluid 3He-B. We observe an exchange of magnons between the time crystals leading to opposite-phase oscillations in their populations—a signature of the AC Josephson effect6—while the defining periodic motion remains phase coherent throughout the experiment. Our results demonstrate that time crystals obey the general dynamics of quantum mechanics and offer a basis to further investigate the fundamental properties of these phases, opening pathways for possible applications in developing fields, such as quantum information processing. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.

KW - Crystals

KW - Josephson junction devices

KW - Quantum optics

KW - Ac Josephson effect

KW - Fundamental properties

KW - General dynamics

KW - Periodic motion

KW - Periodic ordering

KW - Phase oscillation

KW - Quantum-information processing

KW - Translation symmetry

KW - Crystal symmetry

U2 - 10.1038/s41563-020-0780-y

DO - 10.1038/s41563-020-0780-y

M3 - Journal article

VL - 20

SP - 171

EP - 174

JO - Nature Materials

JF - Nature Materials

SN - 1476-1122

ER -