M
Masahito Ueda
Researcher at University of Tokyo
Publications - 426
Citations - 23072
Masahito Ueda is an academic researcher from University of Tokyo. The author has contributed to research in topics: Bose–Einstein condensate & Quantum. The author has an hindex of 70, co-authored 422 publications receiving 18412 citations. Previous affiliations of Masahito Ueda include Carnegie Mellon University & Nippon Telegraph and Telephone.
Papers
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Squeezed spin states
Masahiro Kitagawa,Masahito Ueda +1 more
TL;DR: Two proposed mechanisms, referred to as one-axis twisting and two-axis countertwisting, are shown to reduce the standard quantum noise S/2 of the coherent S-spin state down to 1/2(S/3${)}^{1/3}$ and 1/3, respectively.
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Experimental demonstration of information-to-energy conversion and validation of the generalized Jarzynski equality
TL;DR: In this paper, the authors demonstrate the information-to-energy conversion by feedback control has been demonstrated experimentally and demonstrate that feedback can enable the transformation of information into energy without violating the second law of thermodynamics.
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Spinor Bose–Einstein condensates
Yuki Kawaguchi,Masahito Ueda +1 more
TL;DR: An overview of spinor and dipolar Bose-Einstein condensates is given in this paper, where the symmetry of the order parameter is classified using group theory, and various topological excitations are investigated based on homotopy theory.
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Spinor Bose gases: Symmetries, magnetism, and quantum dynamics
Dan Stamper-Kurn,Masahito Ueda +1 more
TL;DR: In this paper, a review of the experimental techniques used for characterizing spinor gases, their mean-field and many-body ground states, both in isolation and under the application of symmetry-breaking external fields, are discussed.
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Topological phases of non-Hermitian systems
Zongping Gong,Yuto Ashida,Kohei Kawabata,Kazuaki Takasan,Sho Higashikawa,Masahito Ueda,Masahito Ueda +6 more
TL;DR: In this article, a coherent framework of topological phases of non-Hermitian Hamiltonians was developed, and the K-theory was applied to systematically classify all the topology phases in the Altland-Zirnbauer classes in all dimensions.