Quantum Measurements on Trapped Ions (Prof. J. Home)
14:30 - 15:30
Prof. Dr. Jonathan Home
ETH Zürich, Department of Physics, Institute for Quantum Electronics
Herbert Walther Lecture Hall
Measurement as defined in quantum physics rarely corresponds to what is performed in the laboratory.
I will describe
multiple experiments in which we have investigated the character of sequential
measurements performed on a quantum system realized using the internal and
motional states of trapped ions. All of these use a binary measurement to
extract information from a system with a Hilbert which is larger than a single
qubit, resulting in quantum coherence which persists after the measurement.
Correlations between measurement results allow the evaluation of tests of
hidden-variable theories, while we are also able to demonstrate crucial
elements in creating and measuring encoded qubits for quantum information