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BEGIN:VEVENT
DTSTAMP:20260628T072746Z
DTSTART;VALUE=DATE-TIME:20130605T163000
DTEND;VALUE=DATE-TIME:20130605T173000
SUMMARY:Quantum coherent phenomena of single and few particle emitters
TZID:Europe/London
UID:20130605-094d43d53eccbc9b013ed0745cc22472@warwick.ac.uk
CREATED:20130523T081446Z
DESCRIPTION:Colloquium Markus Buttiker University of Geneva We explain an
 d illustrate the revolution which single and few particle emitters bring
  to electron physics. The structures are similar to those implemented in
  small semiconductor chips used in present day computers except that tra
 nsport is investigated at sub-Kelvin temperatures at which electrons exh
 ibit particle-wave duality. Most electron physics has thus far used elec
 trons injected from metallic contacts. Due to the Pauli principle and th
 e quantum Hall effect the phase space for electrons can be reduced suffi
 ciently to observe two-particle electron states. In particular we predic
 ted an Aharonov-Bohm effect which exists only due to the simultaneous pr
 esence of two particles and has recently been observed. To prove that th
 ese states are entangled poses a problem. Ideally Bell tests require equ
 al time measurements. This is presently difficult since we can typically
  not observe individual electrons. Thus we can infer the equal time beha
 vior only from long time measurements. This opens a loop hole. Alternati
 vely we can increase control by generating quantum states with single pa
 rticle emitters and in this way assure that at given instant only two ex
 cess particles participate in transport.
LOCATION:PLT
CATEGORIES:Departmental Colloquium
LAST-MODIFIED:20130523T081446Z
ORGANIZER;CN=Rudo Roemer:
END:VEVENT
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