Mathematical Formulas Describe Physical Phenomenon in Quantum Dots, Other Nanomaterials
Written by AZoNanoDec 24 2020
Theoretical physicists Yoshimichi Teratani and Akira Oguri of Osaka City University, and Rui Sakano of the University of Tokyo have developed mathematical formulas that describe a physical phenomenon happening within quantum dots and other nanosized materials.
The formulas, published in the journal
Physical Review Letters, could be applied to further theoretical research about the physics of quantum dots, ultra-cold atomic gasses, and quarks.
At issue is the Kondo effect . This effect was first described in 1964 by Japanese theoretical physicist Jun Kondo in some magnetic materials, but now appears to happen in many other systems, including quantum dots and other nanoscale materials.
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Home > Press > Theory describes quantum phenomenon in nanomaterials: Osaka City University scientists have developed mathematical formulas to describe the current and fluctuations of strongly correlated electrons in quantum dots. Their theoretical predictions could soon be tested experimentally
A quantum dot (the yellow part) is connected to two lead electrodes (the blue parts). Electrons tunneling into the quantum dot from the electrodes interact with each other to form a highly correlated quantum state, called Fermi liquid. Both nonlinear electric current passing through the quantum dot and its fluctuations that appear as a noise carry important signals, which can unveil underlying physics of the quantum liquid. It is clarified that three-body correlations of the electrons evolve significantly and play essential roles in the quantum state under the external fields that break the particle-hole or time-reversal symmetry.
Theory describes quantum phenomenon in nanomaterials
Osaka City University scientists have developed mathematical formulas to describe the current and fluctuations of strongly correlated electrons in quantum dots. Their theoretical predictions could soon be tested experimentally.
A schematic illustration of a nanoscale circuit. A quantum dot (the yellow part) is connected to two lead electrodes (the blue parts). Electrons tunneling into the quantum dot from the electrodes interact with each other to form a highly correlated quantum state, called “Fermi liquid”. Both nonlinear electric current passing through the quantum dot and its fluctuations that appear as a noise carry important signals, which can unveil underlying physics of the quantum liquid. It is clarified that three-body correlations of the electrons evolve significantly and play essential roles in the quantum state under the external fields that break the particle-hole or time-reversal symmetry.