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Parameter estimation by multi-channel photon counting
Alexander Holm Kiilerich, Klaus Mølmer
The physical parameters governing the dynamics of a light emitting quantum system can be estimated from the photon counting signal. The information available in the full detection…
Multi-frequency modes in superconducting resonators: Bridging frequency gaps in off-resonant couplings
Christian Kraglund Andersen, Klaus Mølmer
A Superconducting Quantum Interference Device (SQUID) inserted in a superconducting waveguide resonator imposes current and voltage boundary conditions that makes it suitable as a…
Double-Fock Superposition Interferometry for Differential Diagnosis of Decoherence
Malte C. Tichy, Young-Sik Ra, Hyang-Tag Lim +3
Interferometric signals are degraded by decoherence, which encompasses dephasing, mixing and any distinguishing which-path information. These three paradigmatic processes are funda…
Prediction and retrodiction for a continuously monitored superconducting qubit
D. Tan, S. Weber, I. Siddiqi +2
The quantum state of a superconducting transmon qubit inside a three-dimensional cavity is monitored by reflection of a microwave field on the cavity. The information inferred from…
Hypothesis testing with open quantum systems
Klaus Molmer
Using a quantum circuit model we derive the maximal ability to distinguish which of several candidate Hamiltonians describe an open quantum system. This theory, in particular, prov…
Adiabatic tracking of quantum many-body dynamics
Hamed Saberi, Tomáš Opatrný, Klaus Mølmer +1
The nonadiabatic dynamics of a many-body system driven through a quantum critical point can be controlled using counterdiabatic driving, where the formation of excitations is suppr…