Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Continuous-Variable Quantum Teleportation with a Conventional Laser
  (Rev. Ver.)   We give a description of balanced homodyne detection (BHD) using a
conventional laser as a local oscillator (LO), where the laser field outside
the cavity is a mixed state whose phase is completely unknown. Our description
is based on the standard interpretation of the quantum theory for measurement,
and accords with the experimental result in the squeezed state generation
scheme. We apply our description of BHD to continuous-variable quantum
teleportation (CVQT) with a conventional laser to analyze the CVQT experiment
[A. Furusawa et al., Science 282, 706 (1998)], whose validity has been
questioned on the ground of intrinsic phase indeterminacy of the laser field
[T. Rudolph and B.C. Sanders, Phys. Rev. Lett. 87, 077903 (2001)]. We show that
CVQT with a laser is valid only if the unknown phase of the laser field is
shared among sender's LOs, the EPR state, and receiver's LO. The CVQT
experiment is considered valid with the aid of an optical path other than the
EPR channel and a classical channel, directly linking between a sender and a
receiver. We also propose a method to probabilistically generate a strongly
phase-correlated quantum state via continuous measurement of independent
lasers, which is applicable to realizing CVQT without the additional optical
path.

17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an