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Shimada Lab
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A lab that uses tiny superconducting devices to trace the sources of nonequilibrium quasiparticles.
AboutAbout the lab
Measuring quantum phenomena with tiny superconducting devices
The lab studies devices built from tiny junctions, such as Josephson junctions and single-electron devices.
It has developed a highly sensitive method for detecting phonons using a single Cooper-pair transistor.
Using this detection method as its main tool, the lab tackles the problem of where nonequilibrium quasiparticles in superconducting electrodes come from, which is one of the major causes of decoherence in superconducting qubits.
Key terms
- Nonequilibrium quasiparticles
- Quasiparticles that arise in superconducting electrodes. They are considered one of the major causes of decoherence in superconducting qubits
- Andreev reflection
- A phenomenon that occurs at superconductor–normal-metal junctions. The lab studies the emission of energy quanta in this regime
- Single Cooper-pair transistor
- A superconducting device that can also be used as a detector. The lab used it to develop a highly sensitive method for detecting phonons
ResearchResearch themes
The lab fabricates devices such as tiny Josephson junctions and single-electron devices, and studies the phenomena that occur in them. Using the highly sensitive phonon detection method it developed, the lab addresses the problem of nonequilibrium quasiparticles, which cause decoherence in superconducting qubits and malfunctions in single-Cooper-pair devices.
View More ↗MembersFaculty
- ProfessorHiroshi Shimada
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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: “Section of Nexans superconducting cable - Science Museum, London” The wub / CC BY-SA 4.0 (cropped)
- Related lab (Kokubo Lab): “Superconductor vortex effect on a ferrofluid” Julien Bobroff (user:Jubobroff), Frederic Bouquet (user:Fbouquet), LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Related lab (Yamakita Lab): “X-ray Photoelectron Spectroscopy system based on JEOL-4610” Minovich / CC BY-SA 4.0 (cropped)
- Related lab (Ishida Lab): “Lodestone (Magnet Cove Complex, mid-Cretaceous, 96-102 Ma; Magnet Cove, Arkansas, USA) 2” James St. John / CC BY 2.0 (cropped)
- Related lab (Sasaki Lab): “أنابيب نانوية كربونية (Carbon nanotube)” Amira Ben Gouider Trabelsi / CC BY-SA 4.0 (cropped)
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