6/8 APCTP-POSTECH Distinguished Lecture
관련링크
본문
" “The Ring of Brownian motion :
the good, the bad and the simply silly”
ØSpeaker : Prof. Peter Hänggi (University of Augsburg, Germany)
ØPlace : #512, Hogil Kim Memorial Bldg., POSTECH
ØDate & Time : June 8 (Mon), 15:00
ØAbstract
Since the turn of the 20-th century Brownian hiss has continuously disclosed a rich variety of phenomena
in and around physics. The understanding of this jittering motion of suspended microscopic particles has
undoubtedly helped to reinforce and substantiate those pillars on which the basic modern physical theories
are resting: Its formal description provided the key to great achievements in statistical mechanics, the
foundations of quantum mechanics and also astrophysical phenomena, to name only a few [1].
Brownian motion determines the rate limiting step in most transport phenomena via escape events
hat help to overcome obstructing bottlenecks [2], or triggers oscillatory dynamics in excitable media [3].
Although noise is usually thought of as the enemy of order it in fact also can be of constructive influence.
The phenomena of Stochastic Resonance [4,5] and Brownian motors [6,7] present two such archetypes
wherein random Brownian dynamics together with unbiased nonequilibrium forces beneficially cooperate in
enhancing detection and/or in facilitating directed transmission of information. The applications range from
innovative information processing devices in physics, chemistry, and in physical biology to new hardware
for medical rehabilitation. Particularly, those additional non-equilibrium disturbances enable the rectification
of haphazard Brownian noise so that quantum and classical objects can be directed around on a priori
designed routes (Brownian motors). Despite its thrilling manifold successes Brownian motion nevertheless
is not the Theory of Everything, as is revealed by some more doubtful applications.
Contact Person : Prof. Wokyung Sung(054-279-2061, wsung@postech.ac.kr)
"
the good, the bad and the simply silly”
ØSpeaker : Prof. Peter Hänggi (University of Augsburg, Germany)
ØPlace : #512, Hogil Kim Memorial Bldg., POSTECH
ØDate & Time : June 8 (Mon), 15:00
ØAbstract
Since the turn of the 20-th century Brownian hiss has continuously disclosed a rich variety of phenomena
in and around physics. The understanding of this jittering motion of suspended microscopic particles has
undoubtedly helped to reinforce and substantiate those pillars on which the basic modern physical theories
are resting: Its formal description provided the key to great achievements in statistical mechanics, the
foundations of quantum mechanics and also astrophysical phenomena, to name only a few [1].
Brownian motion determines the rate limiting step in most transport phenomena via escape events
hat help to overcome obstructing bottlenecks [2], or triggers oscillatory dynamics in excitable media [3].
Although noise is usually thought of as the enemy of order it in fact also can be of constructive influence.
The phenomena of Stochastic Resonance [4,5] and Brownian motors [6,7] present two such archetypes
wherein random Brownian dynamics together with unbiased nonequilibrium forces beneficially cooperate in
enhancing detection and/or in facilitating directed transmission of information. The applications range from
innovative information processing devices in physics, chemistry, and in physical biology to new hardware
for medical rehabilitation. Particularly, those additional non-equilibrium disturbances enable the rectification
of haphazard Brownian noise so that quantum and classical objects can be directed around on a priori
designed routes (Brownian motors). Despite its thrilling manifold successes Brownian motion nevertheless
is not the Theory of Everything, as is revealed by some more doubtful applications.
Contact Person : Prof. Wokyung Sung(054-279-2061, wsung@postech.ac.kr)
"
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