| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
It is generally difficult to define heat and work in nonequilibrium transport in quantum mesoscopic systems. We succeeded in defining them by considering the nonequilibrium stationary state. There we can heat and work from those that the heat baths on the both sides lose. Using this formulation, we construct the general theory of quantum thermoelectricity and found in what situations we have higher heat efficiency and power.
We proved that the upper limit of the heat efficiency is the Carnot efficiency and showed that it is realized only when the mesoscopic system transmits particles at a certain fixed energy. This corresponds to the quasi-stationary process of classical thermodynamics. We also showed that by braking the time-reversal symmetry both by a magnetic field and an inelastic scattering, we can increase the power.
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