[21a-E207-1~10] 3.10 Optical quantum physics and technologies

▲ [21a-E207-2] Quantum State Spectroscopy of Atom-Cavity Systems

〇Todd Edward Tilma^1,2, Russell Rundle², Ben Davies², Vince Dwyer², Mark Everitt² (1.Tokyo Inst. of Tech., 2.Loughborough Univ.)

Keywords:Wigner functions, quantum correlations, Jaynes-Cummings model

In this work we explore the nature of quantum correlations between two-level atoms (or qubits) and a single mode of a quantum field in phase space. Similar to time-frequency plots, we introduce the notion of a quantum state spectrogram to allow for the visualisation of quantum correlations in coupled systems. By using our method, we are able to gain information on the quantum state in an accessible way that enables an appreciation of subtle quantum effects, without the need for sophisticated mathematics. We apply the method to the Jaynes-Cummings model and some of its extensions to demonstrate that quantum correlations of entanglement, microscopically distinct superposition, and a combination of the two can be readily identified.