Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heisenberg-Limited Waveform Estimation with Solid-State Spins in Diamond   The newly established Heisenberg limit in arbitrary waveform estimation is
quite different with parameter estimation and shows a unique characteristic of
a future quantum version of oscilloscope. However, it is still a non-trivial
challenge to generate a large number of exotic quantum entangled states to
achieve this quantum limit. Here, by employing the time-domain quantum
difference detection method, we demonstrate Heisenberg-limited waveform quantum
estimation with diamond spins under ambient condition in the experiment.
Periodic dynamical decoupling is applied to enhance both the dynamic range and
sensitivity by one order of magnitude. Using this quantum-enhanced estimation
scheme, the estimation error of an unknown waveform is reduced by more than $5$
dB below the standard quantum limit with $N\sim{\text{2}} \times
{\text{1}}{{\text{0}}^3}$ resources, where more than ${1 \times
{\text{1}}{{\text{0}}^5}}$ resources would be required to achieve a similar
error level using classical detection. This work provides an essential step
towards realizing quantum-enhanced structure recognition in a continuous space
and time.

25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga