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Nagata Lab
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The lab explores the quantum states of atoms and positronium, an atom made of antimatter.
AboutAbout the lab
What happens when antimatter meets matter?
Nagata Lab studies what kinds of reactions occur when antimatter meets matter.
It focuses on how positronium, an atom in which an electron and its antiparticle, the positron, are bound together like a hydrogen atom, acts on matter.
The lab is also working on controlling the quantum states of atoms using periodic magnetic materials, and on applications of this research.
Key terms
- Antimatter
- Matter that includes the antiparticles of ordinary particles. The antiparticle of the electron is the positron, which turns into gamma rays.
- Annihilation
- A reaction in which a particle and its antiparticle meet and turn into other particles. A positron turns into gamma rays, and an antiproton turns into high-speed pions.
- Positronium
- An atom in which an electron and a positron are bound together like a hydrogen atom. It has a finite lifetime and self-annihilates.
ResearchResearch themes
Antimatter eventually turns into other particles through annihilation, but the physical processes before that are also thought to be important. The lab is conducting experiments on how positronium atoms act on matter, and is working on controlling the quantum states of atoms with periodic magnetic fields.
*Illustrative imagePositronium beam experiments
The lab makes beams of positronium, which is formed from an electron and its antiparticle, the positron, and experimentally investigates its unique properties of having a finite lifetime and self-annihilating. This is joint research with Nagashima Lab.
*Illustrative imageControlling atomic quantum states with periodic magnetic fields
An atom passing through a static periodic field experiences, from its own perspective, a field that changes over time. This oscillating field acts on the atom in a way similar to electromagnetic waves and makes it possible to control its quantum state. The lab focuses in particular on periodic magnetic fields.
MembersFaculty
The members of Nagata Lab consist of faculty, visiting faculty, and doctoral, master's, and undergraduate students.
- Associate ProfessorYugo Nagata
- Assistant ProfessorYuichi Tachibana
VoicesStudent voices
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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: “CERN Antimatter factory - Alpha experiment” Suaudeau / CC BY-SA 4.0 (cropped)
- Positronium beam experiments: “Positronium Beam - positron source” UCL Faculty of Mathematical & Physical Sciences / CC BY 2.0 (cropped)
- Controlling atomic quantum states with periodic magnetic fields: “Laser with amplifier” Tourbillon / CC BY-SA 3.0 (cropped)
- Related lab (二国研究室): “Bose-Einstein Condensate (BEC) ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (佐中研究室): “Laser 01” Vislupus / CC BY-SA 4.0 (cropped)
- Related lab (吉原研究室): “Floor Standing Cryostat with DR Insert” OJB Quantum / CC BY 4.0 (cropped)
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