arXiv (Cornell University),
Год журнала:
2023,
Номер
unknown
Опубликована: Янв. 1, 2023
With
the
advent
of
quantum
technology,
interest
in
communication
tasks
assisted
by
systems
has
increased
both
academia
and
industry.
Nonetheless,
transmission
a
state
real-world
scenarios
is
bounded
environmental
noise,
so
that
channel
an
open
system.
In
this
work,
we
study
high-dimensional
system
multicore
optical
fiber
characterizing
interaction
as
operations
corresponding
to
probabilistic
phase-flips.
The
experimental
platform
currently
state-of-the-art
for
information
processing
with
fibers.
At
given
evolution
stage
observe
non-Markovian
behaviour
system,
which
demonstrated
through
proof-of-principle
implementation
Quantum
Vault
protocol.
A
better
understanding
phase-noise
fibers
will
improve
several
protocols,
since
they
are
prime
candidate
be
adopted
future
telecom
networks.
Optica,
Год журнала:
2021,
Номер
8(9), С. 1186 - 1186
Опубликована: Июль 9, 2021
Research
on
space-division
multiplexing
(SDM)
came
to
prominence
in
early
2010
being
primarily
proposed
as
a
means
of
multiplying
the
information-carrying
capacity
optical
fibers
at
same
time
increasing
efficiency
through
resource
sharing.
Proposed
SDM
transmission
systems
range
from
parallel
single-mode
with
shared
amplifier
pump
lasers
full
spatial
integration
transceiver
hardware,
signal
processing,
and
amplification
around
fiber
over
100
channels
comprising
multiple
cores
each
carrying
modes.
In
this
paper,
we
review
progress
research.
We
first
outline
main
classifications
features
novel
such
multicore
(MCFs),
multimode
fibers,
few-mode
MCFs,
coupled-core
MCFs.
research
achievements
type
before
discussing
digital-signal
technology,
milestones
networking
demonstrations.
Finally,
draw
comparisons
between
types
current
trends
speculate
future
developments
applications
beyond
data
transmission.
Journal of Optics,
Год журнала:
2022,
Номер
24(8), С. 083001 - 083001
Опубликована: Июнь 20, 2022
Abstract
Multimode
devices
and
components
have
attracted
considerable
attention
in
the
last
years,
different
research
topics
themes
emerged
very
recently.
The
multimodality
can
be
seen
as
an
additional
degree
of
freedom
designing
devices,
thus
allowing
for
development
more
complex
sophisticated
components.
propagation
modes
used
to
increase
fiber
optic
capacity,
but
also
introduce
novel
intermodal
interactions,
well
manipulation
optical
a
variety
applications.
In
this
roadmap
we
would
like
give
readers
comprehensive
overview
most
recent
developments
field,
presenting
contributions
coming
from
topics,
including
technologies,
integrated
optics,
basic
physics
telecommunications.
Photons
offer
the
potential
to
carry
large
amounts
of
information
in
their
spectral,
spatial,
and
polarisation
degrees
freedom.
While
state-of-the-art
classical
communication
systems
routinely
aim
maximize
this
information-carrying
capacity
via
wavelength
spatial-mode
division
multiplexing,
quantum
based
on
multi-mode
entanglement
usually
suffer
from
low
state
quality,
long
measurement
times,
limited
encoding
capacity.
At
same
time,
certification
methods
often
rely
assumptions
that
compromise
security.
Here
we
show
photonic
high-dimensional
transverse
position-momentum
degree-of-freedom
with
a
record
speed,
dimensionality,
without
making
any
about
or
channels.
Using
tailored
macro-pixel
basis,
precise
measurements,
modified
witness,
demonstrate
fidelities
up
94.4%
19-dimensional
state-space,
55
local
dimensions,
an
entanglement-of-formation
4
ebits.
Furthermore,
our
times
improvement
more
than
two
orders
magnitude
over
previous
demonstrations.
Our
results
pave
way
for
noise-robust
networks
saturate
single
photons.
Physical Review Applied,
Год журнала:
2021,
Номер
15(3)
Опубликована: Март 1, 2021
High-dimensional
entanglement
promises
to
increase
the
information
capacity
of
photons
and
is
now
routinely
generated,
exploiting
spatiotemporal
degrees
freedom
single
photons.
A
curious
feature
these
systems
possibility
certifying
despite
strong
noise
in
data.
We
show
that
it
also
possible
exploit
this
noisy
high-dimensional
for
quantum
key
distribution
by
introducing
a
protocol
uses
multiple
subspaces
system
simultaneously.
Our
can
be
used
establish
secret
even
extremely
experimental
conditions,
where
qubit
protocols
fail.
To
that,
we
analyze
performance
our
models
apply
two
most
commonly
sources
entanglement:
time
bins
spatial
modes.
Physical Review Letters,
Год журнала:
2021,
Номер
126(23)
Опубликована: Июнь 11, 2021
Photons
are
natural
carriers
of
high-dimensional
quantum
information,
and,
in
principle,
can
benefit
from
higher
information
capacity
and
noise
resilience.
However,
schemes
to
generate
the
resources
required
for
computing
have
so
far
been
lacking
linear
optics.
Here,
we
show
how
GHZ
states
arbitrary
dimensions
numbers
photons
using
optical
circuits
described
by
Fourier
transform
matrices.
Combining
our
results
with
recent
qudit
Bell
measurements,
that
universal
be
performed
dimensions.
Quantum,
Год журнала:
2024,
Номер
8, С. 1436 - 1436
Опубликована: Авг. 12, 2024
With
the
advent
of
quantum
technology,
interest
in
communication
tasks
assisted
by
systems
has
increased
both
academia
and
industry.
Nonetheless,
transmission
a
state
real-world
scenarios
is
bounded
environmental
noise,
so
that
channel
an
open
system.
In
this
work,
we
study
high-dimensional
system
multicore
optical
fiber
characterizing
interaction
as
operations
corresponding
to
probabilistic
phase-flips.
The
experimental
platform
currently
state-of-the-art
for
information
processing
with
fibers.
At
given
evolution
stage
observe
non-Markovian
behaviour
system,
which
demonstrated
through
proof-of-principle
implementation
Quantum
Vault
protocol.
A
better
understanding
phase-noise
fibers
will
improve
several
protocols,
since
they
are
prime
candidate
be
adopted
future
telecom
networks.
Physical Review Letters,
Год журнала:
2022,
Номер
129(6)
Опубликована: Авг. 3, 2022
Violation
of
Bell's
inequalities
shows
strong
conflict
between
quantum
mechanics
and
local
realism.
Loophole-free
Bell
tests
not
only
deepen
understanding
mechanics,
but
are
also
important
foundations
for
device-independent
(DI)
tasks
in
information.
High-dimensional
systems
offer
a
significant
advantage
over
qubits
closing
the
detection
loophole.
In
symmetric
scenario,
efficiency
as
low
61.8%
can
be
tolerated
using
four-dimensional
states
four-setting
inequality
[Phys.
Rev.
Lett.
104,
060401
(2010)].
For
first
time,
we
show
that
entangled
photons
violate
while
loophole
experiment.
The
source
is
about
71.7%,
fidelity
state
$0.995\ifmmode\pm\else\textpm\fi{}0.001$.
Combining
technique
multicore
fibers,
realization
loophole-free
high-dimensional
DI
technologies
promising.
The
development
and
wide
application
of
quantum
technologies
highly
depend
on
the
capacity
communication
channels
distributing
entanglement.
Space-division
multiplexing
(SDM)
enhances
data
channel
transmission
in
classical
telecommunication
bears
potential
to
transfer
idea
using
current
infrastructure.
Here,
we
demonstrate
a
SDM
polarization-entangled
photons
over
411
m
long
19-core
multicore
fiber
photon
pairs
through
up
12
simultaneously.
quality
multiplexed
is
evidenced
by
high
polarization
visibility
Clauser–Horne–Shimony–Holt
(CHSH)
Bell
inequality
violation
for
each
pair
opposite
cores.
Our
distribution
scheme
shows
stability
24
h
without
any
active
stabilization
can
be
effortlessly
adapted
higher
number
channels.
This
technique
increases
quantum-channel
allows
reliable
implementation
networks
multiple
users
based
single
entangled
source.Received
18
August
2021Revised
14
October
2021Accepted
November
2021DOI:https://doi.org/10.1103/PRXQuantum.2.040356Published
American
Physical
Society
under
terms
Creative
Commons
Attribution
4.0
International
license.
Further
this
work
must
maintain
attribution
author(s)
published
article's
title,
journal
citation,
DOI.Published
SocietyPhysics
Subject
Headings
(PhySH)Research
AreasQuantum
channelsQuantum
correlations
informationQuantum
entanglementQuantum
Information
Advanced Photonics Nexus,
Год журнала:
2023,
Номер
2(03)
Опубликована: Апрель 12, 2023
Recently,
transmitting
diverse
signals
in
different
cores
of
a
multicore
fiber
(MCF)
has
greatly
improved
the
communication
capacity
single
fiber.
In
such
an
MCF-based
system,
mux/demux
devices
with
broad
bandwidth
are
great
significance.
this
work,
we
design
and
fabricate
19-channel
device
based
on
femtosecond
laser
direct
writing.
The
fabricated
possesses
average
insertion
loss
0.88
dB
intercore
crosstalk
no
more
than
−
29.1
dB.
Moreover,
features
across
C+L
band.
Such
enables
low-loss
19-core
(de)multiplexing
over
whole
band,
showing
convincing
potential
value
wavelength-space
division
multiplexing
applications.
addition,
fan-in/fan-out
system
is
also
established
pair
work.
