Dissipation-Assisted Coherence Formation in a Spinor Quantum Gas

Yujiro Eto, Hitoshi Shibayama, Kosuke Shibata, Aki Torii, Keita Nabeta, Hiroki Saito, and Takuya Hirano
Phys. Rev. Lett. 122, 245301 – Published 21 June 2019
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Abstract

We report the formation of magnetic eigenstates assisted by naturally occurring particle dissipation in a Bose-Einstein condensate of spin-2 Rb87 atoms. Although the atomic interaction energetically favors the nonferromagnetic state, we observed the spontaneous evolution of an unpolarized spin state into the transverse ferromagnetic state. Under such dynamics, the spin-dependent dissipation of atoms enhances the synchronization of the relative phases among five magnetic sublevels to promote magnetization. Through numerical simulations based on mean-field theory, we show that another exotic magnetic eigenstate, the cyclic state, can also be formed through the spin-dependent dissipation of atoms.

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  • Received 19 November 2018
  • Revised 19 March 2019

DOI:https://doi.org/10.1103/PhysRevLett.122.245301

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Yujiro Eto1,2, Hitoshi Shibayama3, Kosuke Shibata4, Aki Torii4, Keita Nabeta4, Hiroki Saito5, and Takuya Hirano4

  • 1National Institute of Advanced Industrial Science and Technology (AIST), NMIJ, Tsukuba, Ibaraki 305-8568, Japan
  • 2JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
  • 3College of Industrial Technology, Nihon University, Narashino 275-8576, Japan
  • 4Department of Physics, Gakushuin University, Toshima, Tokyo 171-8588, Japan
  • 5Department of Engineering Science, University of Electro-Communications, Chofu, Tokyo 182-8585, Japan

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Issue

Vol. 122, Iss. 24 — 21 June 2019

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