TY - JOUR
T1 - Measuring irreversible dynamics of a quantum harmonic oscillator
AU - Morigi, Giovanna
AU - Solano, E.
AU - Englert, Berthold Georg
AU - Walther, Herbert
PY - 2002/1/1
Y1 - 2002/1/1
N2 - We show that the unitary evolution of a harmonic oscillator coupled to a two-level system can be undone by a suitable manipulation of the two-level system—more specifically, by a quasi-instantaneous phase change. This enables us to isolate the dissipative evolution to which the oscillator may be exposed in addition. With this method we study the decoherence time of a photon mode in cavity QED, and that of the quantized harmonic motion of trapped ions. We comment on the relation to spin echoes and multipath interferometry. © 2002 The American Physical Society.
AB - We show that the unitary evolution of a harmonic oscillator coupled to a two-level system can be undone by a suitable manipulation of the two-level system—more specifically, by a quasi-instantaneous phase change. This enables us to isolate the dissipative evolution to which the oscillator may be exposed in addition. With this method we study the decoherence time of a photon mode in cavity QED, and that of the quantized harmonic motion of trapped ions. We comment on the relation to spin echoes and multipath interferometry. © 2002 The American Physical Society.
M3 - Artículo
SN - 2469-9926
VL - 65
JO - Physical Review A: atomic, molecular, and optical physics
JF - Physical Review A: atomic, molecular, and optical physics
ER -