Topological Phases of Non-Hermitian Systems
- Z. Gong, Y. Ashida, K. Kawabata, K. Takasan, S. Higashikawa, Masahito Ueda
- PhysicsPhysical Review X
- 22 February 2018
Recent experimental advances in controlling dissipation have brought about unprecedented flexibility in engineering non-Hermitian Hamiltonians in open classical and quantum systems. A particular…
Symmetry and Topology in Non-Hermitian Physics
- K. Kawabata, K. Shiozaki, Masahito Ueda, M. Sato
- Physics, MathematicsPhysical Review X
- 21 December 2018
We develop a complete theory of symmetry and topology in non-Hermitian physics. We demonstrate that non-Hermiticity ramifies the celebrated Altland-Zirnbauer symmetry classification for insulators…
Spinor Bose–Einstein Condensates
- Y. Kawaguchi, Masahito Ueda
- PhysicsQuantum Atom Optics
- 13 January 2010
Spinor Bose gases: Symmetries, magnetism, and quantum dynamics
- D. Stamper-Kurn, Masahito Ueda
- Physics
- 26 July 2013
Spinor Bose gases form a family of quantum fluids manifesting both magnetic order and superfluidity. This article reviews experimental and theoretical progress in understanding the static and dynamic…
Non-Hermitian physics
- Y. Ashida, Z. Gong, Masahito Ueda
- PhysicsAdvances in Physics
- 2 June 2020
A review is given on the foundations and applications of non-Hermitian classical and quantum physics. First, key theorems and central concepts in non-Hermitian linear algebra, including Jordan normal…
Minimal energy cost for thermodynamic information processing: measurement and information erasure.
- T. Sagawa, Masahito Ueda
- PhysicsPhysical Review Letters
- 24 September 2008
The fundamental lower bounds on the thermodynamic energy cost of measurement and information erasure are determined and constitute the second law of "information thermodynamics," in which information content and thermodynamic variables are treated on an equal footing.
Deep Gamblers: Learning to Abstain with Portfolio Theory
- Liu Ziyin, Zhikang T. Wang, Paul Pu Liang, R. Salakhutdinov, Louis-Philippe Morency, Masahito Ueda
- Computer ScienceNeural Information Processing Systems
- 29 June 2019
Inspired by portfolio theory, a loss function for the selective classification problem based on the doubling rate of gambling is proposed, which allows us to train neural networks and characterize the disconfidence of prediction in an end-to-end fashion.
Generalized Jarzynski equality under nonequilibrium feedback control.
- T. Sagawa, Masahito Ueda
- MathematicsPhysical Review Letters
- 28 July 2009
The Jarzynski equality is generalized to situations in which nonequilibrium systems are subject to a feedback control, and an "information ratchet" is introduced, which can transport a Brownian particle in one direction and extract positive work from the particle.
Experimental demonstration of information-to-energy conversion and validation of the generalized Jarzynski equality
- Shoichi Toyabe, T. Sagawa, Masahito Ueda, E. Muneyuki, M. Sano
- Physics
- 1 December 2010
Feedback mechanisms such as the ‘demon’ in Maxwell’s well-known thought experiment can, in principle, enable the transformation of information into energy, without violating the second law of…
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