Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum limits for precisely estimating the orientation and wobble of
  dipole emitters   Precisely measuring molecular orientation is key to understanding how
molecules organize and interact in soft matter, but the maximum theoretical
limit of measurement precision has yet to be quantified. We use quantum
estimation theory and Fisher information (QFI) to derive a fundamental bound on
the precision of estimating the orientations of rotationally fixed molecules.
While direct imaging of the microscope pupil achieves the quantum bound, it is
not compatible with widefield imaging, so we propose an interferometric imaging
system that also achieves QFI-limited measurement precision. Extending our
analysis to rotationally diffusing molecules, we derive conditions that enable
a subset of second-order dipole orientation moments to be measured with
quantum-limited precision. Interestingly, we find that no existing techniques
can measure all second moments simultaneously with QFI-limited precision; there
exists a fundamental trade-off between precisely measuring the mean orientation
of a molecule versus its wobble. This theoretical analysis provides crucial
insight for optimizing the design of orientation-sensitive imaging systems.

5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat