Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A two-way photonic quantum entanglement transfer interface   A quantum interface for two-way entanglement transfer between orbital angular
momentum degree of freedom in free space and time-energy degree of freedom in
optical fibers, provides a novel way toward establishing entanglement between
remote heterogeneous quantum nodes. Here, we experimentally demonstrate this
kind of transfer interface by using two interferometric cyclic gates. By using
this quantum interface, we perform two-way entanglement transfer for the two
degrees of freedom. The results show that the quantum entangled state can be
switched back and forth between orbital angular momentum and time-energy
degrees of freedom, and the fidelity of the state before and after switching is
higher than 90%. Our work demonstrates the feasibility and high performance of
our proposed transfer interface, and paves a route toward building a
large-scale quantum communication network.

4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess