Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reversing Quantum Nondemolition Interaction as Quantum Erasing   We reverse a quantum nondemolition (QND) interaction and restore the signal
quantum state by measurement and feedforward. This operation corresponds to
quantum erasing for continuous variables (CVs). CV quantum eraser restores the
coherence of the signal quantum state by erasing the signal information leaking
to another system, where the information leaking is induced by the QND
interaction. We employ a homodyne measurement for erasing of the information.
Then, by performing a feedforward displacement operation, we restore the
initial quantum state together with its coherence. For verification, we use a
coherent state and a squeezed vacuum state as inputs, and then restore one of
them or the other, whichever we choose. Experimental results are shown as
Wigner functions, average fidelity, change in coherence, and trade-off between
leakage information and coherence.

23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph