公开(公告)号：US20200275547A1

公开(公告)日：2020-08-27

申请号：US16799626

申请日：2020-02-24

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  RIKEN

Inventor： Hiromitsu IMAI ,  Tomoyo AKATSUKA ,  Katsuya OGURI ,  Atsushi ISHIZAWA ,  Hideki GOTOH ,  Hidetoshi KATORI ,  Masao TAKAMOTO

IPC: H05H3/02 ,  G21K1/093

Abstract: A magneto-optical trap apparatus includes a vacuum vessel for encapsulating an atom to be trapped, an anti-Helmholtz coil for applying a magnetic field to an inside of the vacuum vessel, a laser device for generating a laser beam, and an irradiation device for irradiating the generated laser beam from a plurality of directions. The laser beam includes a first laser beam detuned from a first resonance frequency when the atom transits from a total angular momentum quantum number F in a ground state to a total angular momentum quantum number F′=F+1 in an excited state, and a second laser beam detuned from a second resonance frequency when the atom transits from the total angular momentum quantum number F in the ground state to a total angular momentum quantum number F′=F−1 in the excited state, among transitions from J=0 in a ground state to J′=1 in an excited state.

公开(公告)号：US20230422386A1

公开(公告)日：2023-12-28

申请号：US18461176

申请日：2023-09-05

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  RIKEN

Inventor： Hiromitsu IMAI ,  Tomoyo AKATSUKA ,  Katsuya OGURI ,  Atsushi ISHIZAWA ,  Hideki GOTOH ,  Hidetoshi KATORI ,  Masao TAKAMOTO

IPC: H05H3/02 ,  G21K1/093 ,  G04F5/14

CPC classification number: H05H3/02 ,  G04F5/145 ,  G21K1/093

Abstract: A magneto-optical trap method including applying a magnetic field to an atom encapsulated in a vacuum vessel and having a nuclear spin of not less than 3/2 by using an anti-Helmholtz coil. Then generating a laser beam including a first laser beam detuned from a first resonance frequency when the atom transits from a total angular momentum quantum number F in a ground state to a total angular momentum quantum number F′=F+1 in an excited state, and a second laser beam detuned from a second resonance frequency when the atom transits from the total angular momentum quantum number F in the ground state to a total angular momentum quantum number F′=F−1 in the excited state.