Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improving the precision of frequency estimation via long-time coherences   In the last years several estimation strategies have been formulated to
determine the value of an unknown parameter in the most precise way, taking
into account the presence of noise. These strategies typically rely on the use
of quantum entanglement between the sensing probes and they have been shown to
be optimal in the asymptotic limit in the number of probes, as long as one
performs measurements on shorter and shorter time scales. Here, we present a
different approach to frequency estimation, which exploits quantum coherence in
the state of each sensing particle in the long time limit and is obtained by
properly engineering the environment. By means of a commonly used master
equation, we show that our strategy can overcome the precision achievable with
entanglement-based strategies for a finite number of probes. We discuss a
possible implementation of the scheme in a realistic setup that uses trapped
ions as quantum sensors.

22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin