5 papers
Topological protection of local quantum Fisher information
Marcin Płodzień, Jan Chwedeńczuk
In many-body quantum systems, unitary dynamics generically delocalize locally encoded information, causing single-site metrological sensitivity to vanish. We analytically demonstra…
Unlocking photodetection for quantum sensing with Bayesian likelihood-free methods and deep learning
Mateusz Molenda, Lewis A. Clark, Marcin Płodzień +1
To operate quantum sensors at their quantum limit in real time, it is crucial to identify efficient data inference tools for rapid parameter estimation. In photodetection, the key…
Volume-law protection of metrological advantage
Piotr Wysocki, Jan Chwedeńczuk, Marcin Płodzień
Although entanglement can boost metrological precision beyond the standard quantum limit, the advantage often disappears with particle loss. We demonstrate that scrambling safeguar…
Generation and read-out of many-body Bell correlations with a probe qubit
Marcin Płodzień, Jan Chwedeńczuk
As demand for quantum technologies increases, so does the need to generate and classify non-classical correlations in complex many-body systems. We introduce a simple and versatile…
Non-stabilizerness in quantum-enhanced metrological protocols
Tanausú Hernández-Yanes, Piotr Sierant, Jakub Zakrzewski +1
Non-stabilizerness (colloquially "magic") characterizes genuinely quantum (beyond-Clifford) operations necessary for preparation of quantum states, and can be measured by stabilize…