Nonlinear two-level dynamics of quantum time crystals.
Nonlinear two-level dynamics of quantum time crystals.
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DOI:
10.1038/s41467-022-30783-w
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发表时间:
2022-06-02
影响因子:
16.6
通讯作者:
Eltsov, V. B.
中科院分区:
文献类型:
--
作者:
Autti, S.;Heikkinen, P. J.;Nissinen, J.;Makinen, J. T.;Volovik, G. E.;Zavyalov, V. V.;Eltsov, V. B.
A time crystal is a macroscopic quantum system in periodic motion in its ground state. In our experiments, two coupled time crystals consisting of spin-wave quasiparticles (magnons) form a macroscopic two-level system. The two levels evolve in time as determined intrinsically by a nonlinear feedback, allowing us to construct spontaneous two-level dynamics. In the course of a level crossing, magnons move from the ground level to the excited level driven by the Landau-Zener effect, combined with Rabi population oscillations. We demonstrate that magnon time crystals allow access to every aspect and detail of quantum-coherent interactions in a single run of the experiment. Our work opens an outlook for the detection of surface-bound Majorana fermions in the underlying superfluid system, and invites technological exploitation of coherent magnon phenomena – potentially even at room temperature. Recent work has reported a realization of a time crystal in the form of the Bose-Einstein condensate of magnons in superfluid 3He. Here, the authors study the dynamics of a pair of such quantum time crystals and show that it closely resembles the evolution of a two-level system, modified by nonlinear feedback.
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影响因子:
3.7
作者:
Autti, S.;Heikkinen, P. J.;Eltsov, V. B.
通讯作者:
Eltsov, V. B.
影响因子:
8.6
作者:
Autti, S.;Bunkov, Yu. M.;Volovik, G. E.
通讯作者:
Volovik, G. E.
影响因子:
4.2
作者:
Autti, S.;Heikkinen, P. J.;Eltsov, V. B.
通讯作者:
Eltsov, V. B.
影响因子:
2.8
作者:
Fisher, SN;Guénault, AM;Skyba, P
通讯作者:
Skyba, P
影响因子:
2
作者:
Heikkinen, P. J.;Autti, S.;Zavjalov, V. V.
通讯作者:
Zavjalov, V. V.