Quantum measurement and nonclassical vibration of an ion in a trap

Journal Article · Fri Jan 15 04:00:00 EST 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.57447· OSTI ID:21207933

Huesmann, R; Balzer, Ch; Appasamy, B; Stalgies, Y; Toschek, P E ^[1]

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1. Institut fuer Laser-Physik, Jungiusstrasse 9, 20355 Hamburg (Germany)

The microwave-induced dynamics of the nuclear spin and the laser-induced dynamics of the centre-of-mass motion of individual ions have been studied: (i) The phase shift of the hyperfine Larmor precession of a ground-state {sup 171}Yb{sup +} ion upon pulsed variation of the ambient magnetic field has been measured by microwave-optical double resonance interpreted in terms of Mach-Zehnder interferometry and quantum ergodicity. Even a single measurement yields (partial) phase information. At the extremes of the fringes, the results of measurements are deterministic where ion probing is compatible with ion preparation, as demonstrated by laser-exciting an ion on an E2 line. (ii) Excitation and de-excitation spectra of the E2 line S{sub 1/2}-D{sub 5/2} of an individual trapped {sup 138}Ba{sup +} ion show different first-order sidebands of radial and axial ion vibration in the trap, since the vibrational distribution in the excited D{sub 5/2} level is modified by the ion being reduced to this level in null observations of resonance light. Delayed sideband deexcitation eventually leaves the ion in the Fock state |n=1> ('stochastic cooling'). Sideband modulation is identified as stroboscopic detection of the light-induced nutation.

• OSTI ID: 21207933
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 457; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BARIUM 138
BARIUM IONS
DE-EXCITATION
E2-TRANSITIONS
EXCITATION
GROUND STATES
INTERFEROMETRY
LARMOR PRECESSION
LASER RADIATION
MAGNETIC FIELDS
MICROWAVE RADIATION
PHASE SHIFT
PHOTON-ATOM COLLISIONS
RESONANCE
SPIN
STOCHASTIC COOLING
TRAPS
ZEEMAN EFFECT