First experimental evidence for quantum echoes in scattering systems.
A self-pulsing effect termed quantum echoes has been observed in experiments with an open superconducting and a normal conducting microwave billiard whose geometry provides soft chaos, i.e., a mixed phase space portrait with a large stable island. For such systems a periodic response to an incoming pulse has been predicted. Its period has been associated with the degree of development of a horseshoe describing the topology of the classical dynamics. The experiments confirm this picture and reveal the topological information.
Dembowski
C
C
Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
Dietz
B
B
Friedrich
T
T
Gräf
H-D
HD
Heine
A
A
Mejía-Monasterio
C
C
Miski-Oglu
M
M
Richter
A
A
Seligman
T H
TH