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Fukuhara Lab
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The lab manipulates laser-cooled atoms to take on the mysteries of quantum many-body systems.
AboutAbout the lab
Controlling quantum many-body systems at the single-atom level.
The Fukuhara Lab uses atoms cooled to ultracold temperatures with lasers to experimentally study the behavior of quantum many-body systems made up of many particles.
When particles gather, various phenomena arise from the interactions between particles and from the properties of quantum statistics, but solving the problem generally becomes difficult.
Cold atoms can be described by very simple physical models and their conditions can be finely tuned, which makes them an excellent platform for studying quantum many-body systems.
The lab aims to deepen understanding by achieving ultimate control over quantum many-body systems, and to connect that understanding to applications.
Key terms
- Cold atoms
- A collection of atoms cooled to microkelvin temperatures or below with laser light or other means. Their quantum properties become apparent.
- Optical lattice
- A periodic structure made with laser light. With it, atoms can be used to create a situation similar to electrons in a crystal.
- Quantum simulation
- A method of reproducing the mechanism of a material under study by mapping it onto another quantum system whose conditions are easier to change.
NewsLab news
A student won the Outstanding Student Presentation Award at the 8th Cold Atom Research Meeting "Atom no Kai"
A student received the Waseda Applied Physics Society Award (Iino Prize)
Paper on quantum state tomography using a helical basis published in PRX Quantum
A student won the Outstanding Student Presentation Award at the 7th Cold Atom Research Meeting "Atom no Kai"
Prof. Fukuhara joined, and the lab got started
ResearchResearch themes
The lab develops ultimate quantum control techniques using cold atoms and opens up new research on quantum many-body systems. Understanding quantum many-body systems is a challenge relevant to a wide range of phenomena, from particle physics to condensed matter physics and astrophysics, and the lab takes it on mainly through experiments.
*Illustrative imageCold atoms and quantum gases
By shining appropriately tuned laser light, atomic gases are cooled to the microkelvin range, and then lowered to the nanokelvin range by evaporative cooling. In an ensemble of atoms obeying Bose statistics, Bose-Einstein condensation occurs, and all the atoms behave like a single wave and show superfluidity.
*Illustrative imageQuantum simulation with optical lattices
When a quantum gas is placed in a periodic structure made of light (an optical lattice), a system closely resembling electrons in a crystal lattice is created. Using this correspondence, the lab simulates solid-state materials and investigates which quantum phases and quantum phenomena appear when conditions are changed.
*Illustrative imageQuantum gas microscope
This is a technique for measuring and manipulating quantum gases at the single-atom level. It gives access to microscopic information and quantum correlations in condensed matter physics that were previously hard to observe, and the lab is considering whether a "Maxwell's demon" can be realized in a quantum many-body system through measurement-based manipulation.
MembersFaculty
- Professor (Fixed-term)Takeshi Fukuhara
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: “Cloud of ultracold atoms levitated in a magneto-optical trap” Balping / CC BY-SA 4.0 (cropped)
- Cold atoms and quantum gases: “Bose-Einstein Condensate ( )” National Institute of Standards and Technology / Public domain (cropped)
- Quantum simulation with optical lattices: “AtomsInLattice” Jpagett / CC BY-SA 4.0 (cropped)
- Quantum gas microscope: “Optical Microscope Objective Lens” Kiran Foster / CC BY 2.0 (cropped)
- Related lab (Aoki Lab): “Fibres optique” Pastèque24 / CC BY-SA 4.0 (cropped)
- Related lab (Ozawa Lab): “World First Hiperboloid structure named Shukhov Tower in Polibino” Arssenev / CC BY-SA 4.0 (cropped)
- Related lab (Kataoka Lab): “Fermi Gamma-ray Space Telescope spacecraft model” NASA / Public domain (cropped)
- Related lab (Kita Lab): “5C2A5953R - – Silicon Wafer 20200519” Rob Bulmahn / CC BY 2.0 (cropped)
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