Experimental super-Heisenberg quantum metrology with indefinite gate order
The precision of quantum metrology is widely believed to be restricted by the Heisenberg
limit, corresponding to a root mean square error that is inversely proportional to the number …
limit, corresponding to a root mean square error that is inversely proportional to the number …
Asymptotic theory of quantum channel estimation
The quantum Fisher information (QFI), as a function of quantum states, measures the
amount of information that a quantum state carries about an unknown parameter. The …
amount of information that a quantum state carries about an unknown parameter. The …
When is a non-Markovian quantum process classical?
More than a century after the inception of quantum theory, the question of which traits and
phenomena are fundamentally quantum remains under debate. Here, we give an answer to …
phenomena are fundamentally quantum remains under debate. Here, we give an answer to …