7 papers
Flow of local sensitivity in a spin chain coupled to a bosonic bath
Marcin PÅodzieÅ
We study how local sensitivity to an encoded parameter, captured by the quantum Fisher information, flows between a spin chain, a coupled bosonic bath, and their quantum correlatio…
Scalable quantum resources with short-range interacting spin- chains
Marcin PÅodzieÅ, Jan ChwedeÅczuk
The dynamical generation of quantum resources, such as many-body entanglement, Bell correlations or spin squeezing, can be achieved via one-axis twisting (OAT) dynamics, which requ…
Topological protection of local quantum Fisher information
Marcin PÅodzieÅ, Jan ChwedeÅczuk
In many-body quantum systems, unitary dynamics generically delocalize locally encoded information, causing single-site metrological sensitivity to vanish. We analytically demonstra…
Generation and read-out of many-body Bell correlations with a probe qubit
Marcin PÅodzieÅ, Jan ChwedeÅczuk
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…
Unlocking photodetection for quantum sensing with Bayesian likelihood-free methods and deep learning
Mateusz Molenda, Lewis A. Clark, Marcin PÅodzieÅ +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 ChwedeÅczuk, Marcin PÅodzieÅ
Although entanglement can boost metrological precision beyond the standard quantum limit, the advantage often disappears with particle loss. We demonstrate that scrambling safeguar…