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SUMMARY:Amplification\, squeezing and entanglement generation with electri
 cal circuits
DTSTART:20101015T110000
DTSTAMP:20260408T071108Z
UID:c3f2e011083e2cd834c8f468603d08cec80fbe4ba6cc608cb8bda54a
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Konrad Lehnert - JILA Colorado\nIn an increasing number 
 of experiments\, information is encoded in the modulation of a pure quantu
 m state of a microwave signal. For example\, the state of superconducting 
 qubits and the position of mechanical oscillators have been efficiently en
 coded into states of the microwave field. In contrast\, the ability to ext
 ract the information from the microwave signal is not as advanced. The bes
 t available microwave measurement technology adds noise forty times larger
  than the quantum fluctuations present in the microwave field. In this tal
 k\, I will describe our effort to develop tools for measuring microwave si
 gnals that introduce much less noise than those quantum fluctuations. The 
 key element of these tools is a type of Josephson parametric amplifier (JP
 A)\, which exploits the electrical nonlinearity of Josephson junctions. We
  now use these amplifiers to routinely approach quantum limited performanc
 e in several different experiments\, including quantum nanomechanics and t
 he readout of astrophysical detectors. In this talk\, I will describe how 
 we use the JPA to tomographically reconstruct a squeezed state of a microw
 ave field\, which was itself created with a JPA. Because pairs of squeezed
  states can be combined to create entangled modes of the microwave field\,
  they form the basis of a general quantum information processing strategy.
  We are evaluating this strategy\, known as continuous variables quantum i
 nformation\, by attempting to realize quantum teleportation between microw
 ave electrical circuits
LOCATION:CE 1 1 https://plan.epfl.ch/?room==CE%201%201
STATUS:CONFIRMED
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