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Nishida Lab
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A theory lab that uses cold atoms to explore universal physics that transcends fields.
AboutAbout the lab
Exploring the universality hidden in diversity
Nishida Lab studies theoretical physics, with cold atoms as its main subject.
The field of cold atoms traps atoms with lasers and cools them to extremely low temperatures on the order of nanokelvin, in order to study the quantum physics that emerges there.
Taking advantage of the ability to freely tune the interaction strength and the spatial dimension, the lab aims to understand universal physical phenomena that appear across different fields.
The lab's research also extends to condensed matter physics and to particle and nuclear physics.
Key terms
- Quantum many-body system
- A collection of many particles that influence one another and behave according to quantum mechanics
- Superfluidity
- A phenomenon in which, at very low temperatures, a liquid or similar substance flows without any viscosity
- Fermi gas
- A gas of particles, such as electrons, that can occupy a given state only one at a time
ResearchResearch themes
The lab studies the theoretical physics of quantum many-body systems and quantum few-body systems, with cold atoms as its main subject. The research also extends to condensed matter and statistical physics and to particle and nuclear physics, aiming to understand universal phenomena that appear across fields and to predict new quantum phenomena.
*Illustrative imageHall Viscosity in Superfluid Helium-3
The lab constructed an effective theory of the superfluid of helium-3, a representative example of a topological superfluid, and showed that it has Hall viscosity, a viscosity that does not involve dissipation.
*Illustrative imageHydrodynamics of Strongly Correlated Atomic Gases
The lab constructed hydrodynamic equations for gases of strongly interacting atoms and theoretically analyzed transport coefficients such as bulk viscosity. These results can be used to measure bulk viscosity in cold atom experiments.
*Illustrative imageTwo-Dimensional Fermi Gases in Antiparallel Magnetic Fields
In cold atoms, Lorentz forces in opposite directions can be created artificially for each component. In a two-dimensional Fermi gas in this situation, the lab found that a superfluid phase and a quantum spin Hall insulator phase appear.
*Illustrative imageUniversal Properties of One-Dimensional Quantum Systems
The lab found that, in one-dimensional quantum systems, three-body correlations appear even in a system of fermions that have only two-body interactions. The lab also analyzed bound states in systems with three-body interactions.
MembersFaculty
- ProfessorYusuke NishidaPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Bose-Einstein Condensate ( )” National Institute of Standards and Technology / Public domain (cropped)
- Hall Viscosity in Superfluid Helium-3: “Liquid helium superfluid phase” Alfred Leitner
（アップロード：Bmatulis） / Public domain (cropped) - Hydrodynamics of Strongly Correlated Atomic Gases: “Cold atoms experiment 04” Tomasz Kawalec / CC BY-SA 4.0 (cropped)
- Two-Dimensional Fermi Gases in Antiparallel Magnetic Fields: “Cloud of ultracold atoms levitated in a magneto-optical trap” Balping / CC BY-SA 4.0 (cropped)
- Universal Properties of One-Dimensional Quantum Systems: “QuEra Aquila Magneto-Optical Trap 2” QuEra Computing, Inc. / CC BY 4.0 (cropped)
- Related lab (向山研究室): “Cold atoms experiment 03” Tomasz Kawalec / CC BY-SA 4.0 (cropped)
- Related lab (笹本研究室): “Quantum material’s subtle spin behavior proves theoretical prediction ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
- Related lab (藤澤研究室): “Dilution Fridge 008 16K” OJB Quantum / CC BY 4.0 (cropped)
- Related lab (上妻研究室): “Cloud of ultracold atoms levitated in a magneto-optical trap” Balping / CC BY-SA 4.0 (cropped)
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