Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Ultracold Atoms II
Q 57.5: Vortrag
Freitag, 10. März 2017, 15:30–15:45, P 104
Measuring correlations of cold-atom systems using multiple quantum probes — •Michael Streif1,2, Andreas Buchleitner2, Dieter Jaksch1,3, and Jordi Mur-Petit1 — 1Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom — 2Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany — 3Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, 117543 Singapore
The remarkable advances in experiments with ultracold bosonic atoms in optical lattices have triggered several possibilities to study the physics of many-body quantum systems. A common issue in most experiments is the destructive nature of the measurement method. For this reason, in recent times, ancillary quantum systems have been used as quantum probes. We here present a non-destructive method to probe a complex quantum system using multiple impurity atoms as quantum probes. It is demonstrated that non-local two-point correlation functions can be determined by accessing a coherence element of the density matrix of the impurities. In particular, for contact interactions between probes and system, our protocol yields the many-body density-density correlation function.