TY - JOUR
T1 - Measurement-Induced Localization of an Ultracold Lattice Gas
AU - Patil, Y. S.
AU - Chakram, S.
AU - Vengalattore, M.
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/10/2
Y1 - 2015/10/2
N2 - The process of measurement can modify the state of a quantum system and its subsequent evolution. Here, we demonstrate the control of quantum tunneling in an ultracold lattice gas by the measurement backaction imposed by the act of imaging the atoms, i.e., light scattering. By varying the rate of light scattering from the atomic ensemble, we show the crossover from the weak measurement regime, where position measurements have little influence on tunneling dynamics, to the strong measurement regime, where measurement-induced localization causes a large suppression of tunneling - a manifestation of the quantum Zeno effect. Our study realizes an experimental demonstration of the paradigmatic Heisenberg microscope and sheds light on the implications of measurement on the coherent evolution of a quantum system.
AB - The process of measurement can modify the state of a quantum system and its subsequent evolution. Here, we demonstrate the control of quantum tunneling in an ultracold lattice gas by the measurement backaction imposed by the act of imaging the atoms, i.e., light scattering. By varying the rate of light scattering from the atomic ensemble, we show the crossover from the weak measurement regime, where position measurements have little influence on tunneling dynamics, to the strong measurement regime, where measurement-induced localization causes a large suppression of tunneling - a manifestation of the quantum Zeno effect. Our study realizes an experimental demonstration of the paradigmatic Heisenberg microscope and sheds light on the implications of measurement on the coherent evolution of a quantum system.
UR - http://www.scopus.com/inward/record.url?scp=84944144942&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84944144942&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.115.140402
DO - 10.1103/PhysRevLett.115.140402
M3 - Article
AN - SCOPUS:84944144942
SN - 0031-9007
VL - 115
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
M1 - 140402
ER -