5 papers · 1 filter
Extracting information from a superradiant burst using simple measurements
Federico Belliardo, Anjun Chu, Martin Koppenhöfer +1
It is well known that superradiant decay of an ensemble of spins generates a complex non-classical state of light. Here, we consider the information content of a superradiant b…
Random layers for quantum optimal control with exponential expressivity
Marco Dall'Ara, Martin Koppenhöfer, Florentin Reiter +3
A long-standing problem in quantum optimal control is finding an optimal pulse structure that leads to an efficient exploration of the unitary space with a minimal number of optimi…
Reconfigurable dissipative entanglement between many spin ensembles: from robust quantum sensing to many-body state engineering
Anjun Chu, Mikhail Mamaev, Martin Koppenhöfer +2
An attractive approach for stabilizing entangled many-body spin states is to employ engineered dissipation. Most existing proposals either target relatively simple collective spin…
Detecting quantum noise of a solid-state spin ensemble with dispersive measurement
Mikhail Mamaev, Jayameenakshi Venkatraman, Martin Koppenhöfer +2
We theoretically explore protocols for measuring the spin polarization of an ensemble of solid-state spins, with precision at or below the standard quantum limit. Such measurements…
Pattern-based quantum functional testing
Erik Weiss, Marcel Cech, Stanislaw Soltan +4
With the growing number of qubits of quantum information processing devices, the task of fully characterizing these processors becomes increasingly unfeasible. From a practical per…