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dc.contributor.author
Fluehmann, C.
dc.contributor.author
Home, J. P.
dc.date.accessioned
2020-08-01T03:28:49Z
dc.date.available
2020-08-01T03:28:49Z
dc.date.issued
2020-07-21
dc.identifier.issn
0031-9007
dc.identifier.issn
1079-7114
dc.identifier.other
10.1103/PhysRevLett.125.043602
dc.identifier.uri
http://hdl.handle.net/20.500.11850/429545
dc.description.abstract
We implement direct readout of the symmetric characteristic function of quantum states of the motional oscillation of a trapped calcium ion. Suitably chosen internal state rotations combined with internal statedependent displacements, based on bichromatic laser fields, map the expectation value of the real or imaginary part of the displacement operator to the internal states, which are subsequently read out. Combining these results provides full information about the symmetric characteristic function. We characterize the technique by applying it to a range of archetypal quantum oscillator states, including displaced and squeezed Gaussian states as well as two and three component superpositions of displaced squeezed states. For each, we discuss relevant features of the characteristic function and Wigner phasespace quasiprobability distribution. The direct reconstruction of these highly nonclassical oscillator states using a reduced number of measurements is an essential tool for understanding and optimizing the control of oscillator systems for quantum sensing and quantum information applications.
dc.publisher
AMER PHYSICAL SOC
dc.title
Direct Characteristic-Function Tomography of Quantum States of the Trapped-Ion Motional Oscillator
dc.type
Journal Article
ethz.journal.title
Physical Review Letters
ethz.journal.volume
125
ethz.journal.issue
4
ethz.journal.abbreviated
Phys. rev. lett.
ethz.identifier.wos
ethz.publication.place
COLLEGE PK
ethz.date.deposited
2020-08-01T03:28:57Z
ethz.source
WOS
ethz.rosetta.exportRequired
true
ethz.COinS
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