Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low-Latency Digital Signal Processing for Feedback and Feedforward in
  Quantum Computing and Communication   Quantum computing architectures rely on classical electronics for control and
readout. Employing classical electronics in a feedback loop with the quantum
system allows to stabilize states, correct errors and to realize specific
feedforward-based quantum computing and communication schemes such as
deterministic quantum teleportation. These feedback and feedforward operations
are required to be fast compared to the coherence time of the quantum system to
minimize the probability of errors. We present a field programmable gate array
(FPGA) based digital signal processing system capable of real-time quadrature
demodulation, determination of the qubit state and generation of
state-dependent feedback trigger signals. The feedback trigger is generated
with a latency of $110\,\mathrm{ns}$ with respect to the timing of the analog
input signal. We characterize the performance of the system for an active qubit
initialization protocol based on dispersive readout of a superconducting qubit
and discuss potential applications in feedback and feedforward algorithms.

34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin