Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-based single-photon transistor, dynamic random access memory,
  diodes and routers in semiconductors   The realization of quantum computers and quantum Internet requires not only
quantum gates and quantum memories, but also transistors at single-photon
levels to control the flow of information encoded on single photons.
Single-photon transistor (SPT) is an optical transistor in the quantum limit,
which uses a single photon to open or block a photonic channel. In sharp
contrast to all previous SPT proposals which are based on single-photon
nonlinearities, here I present a novel design for a high-gain and high-speed
(up to THz) SPT based on a linear optical effect - giant circular birefringence
(GCB) induced by a single spin in a double-sided optical microcavity. A gate
photon sets the spin state via projective measurement and controls the light
propagation in the optical channel. This spin-cavity transistor can be directly
configured as diodes, routers, DRAM units, switches, modulators, etc. Due to
the duality as quantum gate and transistor, the spin-cavity unit provides a
solid-state platform ideal for future Internet - a mixture of all-optical
Internet with quantum Internet.

2
The categories of this paper are: math
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat