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{\Large \bf Low Temperature Physics Group}\\
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Associate Professor&:&Anju~Sawada
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(http://www.lowtemp.phys.tohoku.ac.jp/)\\
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Low temperature physics is one of the most important disciplines in the
fundamental physics. We are interested in quantum fluids such as 
electron liquids in the low temperature region.
$^{3}$He-$^{4}$He dilution refrigeration and nuclear demagnetization
are our cooling methods down to 10$^{-5}$\,K. 
The major subject of our present research is
quantum Hall effect.

The quantum Hall effect arises 
in two-dimensional electron system 
at low temperature and high magnetic field.
The effect is very remarkable: 
at certain values of magnetic field 
the magnetresistance drop to zero,
as if the effective conductance was infinite.
Futher, there are plateaus of the Hall resistance 
near these same values of magnetic field,
and the values of the Hall resistance at the plateaus are
accurately equal to (25.8128075/integer) ohms,
where 25.8128075 is the value of $h/e^2$ expressed in ohms.


Specially, macroscopic quantum interlayer coherence is expected to be
observed in certain quantum Hall states of the bilayer electron
system. It implies that the quantum Hall state is 
one of the Bose condensation states.
This research will also make an academic contribution to establish the
exotic statistics of particles intrinsic to the low dimensional space.

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