What is Optical Lattice Clock?
Professor Katori dedicated 13 years to inventing a high-precision optical lattice clock that deviates by no more than one second over 10 billion years. But what does it mean to confine a million atoms in an “egg carton”? This groundbreaking clock is now the leading candidate for the next-generation redefinition of the second.
An Experiment at TOKYO SKY TREE
Did we succeed in proving Einstein's theory of relativity at TOKYO SKYTREE? Is it true that time moves faster at the 450-meter-high observation deck than at ground level?
Discover the results of our 2020 experiment conducted at TOKYO SKYTREE!
Achieving a Compact Design
We have successfully developed a transportable optical lattice clock model with a volume of just 250 liters—one-quarter the size of its predecessor. This compact and robust optical lattice clock is anticipated to expand its applications beyond traditional timekeeping. Potential uses include advanced scientific research and practical fields such as relativistic geodesy.
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The Latest News
- Shimadzu's Optical Lattice Clock has awarded in 2025 Nikkei Excellent Products & ServicesShimadzu’s Aetherclock OC020 strontium optical lattice … 続きを読む: Shimadzu's Optical Lattice Clock has awarded in 2025 Nikkei Excellent Products & Services
- Prof. Katori talked at the quantum technology anniversary event.To commemorate the 100th anniversary of beginning of th… 続きを読む: Prof. Katori talked at the quantum technology anniversary event.
- The 13th RAP Symposium @ RIKENThe 13th RIKEN Center for Advanced Photonics (RAP) Symp… 続きを読む: The 13th RAP Symposium @ RIKEN
- Prof. Katori attended international conference hosted by Inidian Prime Minister ModiSTIC-2025 hosted by Indian Prime Minister Narendra Modi… 続きを読む: Prof. Katori attended international conference hosted by Inidian Prime Minister Modi
- Student Presentation Award has been awarded to our three members!Mr. Koki NISHIDA (D2), Mr. Hikaru KAWABATA (M2) and Mr.… 続きを読む: Student Presentation Award has been awarded to our three members!
The World's 1st ：250-Liter Optical Lattice Clock
We have successfully developed the world's first transportable optical lattice clock with a compact volume of just 250 liters—one-quarter the size of its predecessor.
This downsized optical lattice clock is easy to relocate, enabling its application in relativistic sensing based on general relativity across various installation environments.