Physical Review Applied,
Год журнала:
2023,
Номер
20(1)
Опубликована: Июль 10, 2023
Greenberger-Horne-Zeilinger
and
$W$
states
feature
genuine
tripartite
entanglement
that
cannot
be
converted
into
each
other
by
local
operations
classical
communication.
Here,
we
present
a
dissipative
protocol
for
deterministic
interconversion
between
of
three
neutral
${}^{87}\mathrm{Rb}$
atoms
arranged
in
an
equilateral
triangle
two-dimensional
array.
With
atomic
levels
diagonal
van
der
Waals
interactions
Rydberg
atoms,
the
entangled
can
efficiently
accomplished
Floquet-Lindblad
framework
through
periodic
optical
pump
dissipation
engineering.
We
evaluate
feasibility
existing
methodology
using
experimental
parameters
accessible
to
current
neutral-atom
platforms.
find
our
scheme
is
robust
against
typical
noises,
such
as
laser
phase
noise
geometric
imperfections
atom
In
addition,
integrate
Gaussian
soft
quantum
control
technique,
which
further
reduces
overall
conversion
time
increases
resilience
timing
errors
interatomic
distance
fluctuations.
The
high-fidelity
provides
route
save
physical
resources
enhance
computational
efficiency
networks
formed
arrays.
Light Science & Applications,
Год журнала:
2022,
Номер
11(1)
Опубликована: Июль 5, 2022
Structured
light
refers
to
the
arbitrarily
tailoring
of
optical
fields
in
all
their
degrees
freedom
(DoFs),
from
spatial
temporal.
Although
orbital
angular
momentum
(OAM)
is
perhaps
most
topical
example,
and
celebrating
30
years
since
its
connection
structure
light,
control
over
other
DoFs
slowly
gaining
traction,
promising
access
higher-dimensional
forms
structured
light.
Nevertheless,
harnessing
these
new
quantum
classical
states
remains
challenging,
with
toolkit
still
infancy.
In
this
perspective,
we
discuss
methods,
challenges,
opportunities
for
creation,
detection,
multiple
We
present
a
roadmap
future
development
trends,
fundamental
research
applications,
concentrating
on
potential
larger-capacity,
higher-security
information
processing
communication,
beyond.
Physical Review Letters,
Год журнала:
2021,
Номер
126(1)
Опубликована: Янв. 8, 2021
High-quality
long-distance
entanglement
is
essential
for
both
quantum
communication
and
scalable
networks.
Entanglement
purification
to
distill
high-quality
from
low-quality
in
a
noisy
environment
it
plays
key
role
repeaters.
The
previous
significant
experiments
require
two
pairs
of
entangled
states
were
demonstrated
table-top.
Here
we
propose
report
high-efficiency
using
only
one
pair
hyperentangled
states.
We
also
demonstrate
its
practical
application
entanglement-based
distribution
(QKD).
One
polarization
spatial-mode
hyperentanglement
was
distributed
over
11
km
multicore
fiber
(noisy
channel).
After
purification,
the
fidelity
arises
0.771
0.887
effective
rate
QKD
increases
0
0.332.
values
Clauser-Horne-Shimony-Holt
(CHSH)
inequality
1.829
2.128.
Moreover,
by
deterministic
controlled-NOT
gate,
total
efficiency
can
be
estimated
as
6.6x10^3
times
than
experiment
with
spontaneous
parametric
down-conversion
(SPDC)
sources.
Our
results
offer
potential
implemented
part
full
repeater
large
scale
network.
Nature Communications,
Год журнала:
2022,
Номер
13(1)
Опубликована: Март 4, 2022
Abstract
Controlling
and
programming
quantum
devices
to
process
information
by
the
unit
of
dit,
i.e.,
qudit,
provides
possibilities
for
noise-resilient
communications,
delicate
molecular
simulations,
efficient
computations,
showing
great
potential
enhance
capabilities
qubit-based
technologies.
Here,
we
report
a
programmable
qudit-based
processor
in
silicon-photonic
integrated
circuits
demonstrate
its
enhancement
computational
parallelism.
The
monolithically
integrates
all
key
functionalities
initialisation,
manipulation,
measurement
two
quart
(ququart)
states
multi-value
quantum-controlled
logic
gates
with
high-level
fidelities.
By
reprogramming
configuration
processor,
implemented
most
basic
Fourier
transform
algorithms,
quaternary,
benchmark
parallelism
using
qudits,
which
include
generalised
Deutsch-Jozsa
Bernstein-Vazirani
quaternary
phase
estimation
fast
factorization
algorithms.
monolithic
integration
high
programmability
have
allowed
implementations
more
than
one
million
high-fidelity
preparations,
operations
projections
qudit
processor.
Our
work
shows
an
photonic
technology
computing
enhanced
capacity,
accuracy,
efficiency,
could
lead
acceleration
building
large-scale
computer.
Reviews of Modern Physics,
Год журнала:
2023,
Номер
95(4)
Опубликована: Дек. 20, 2023
Quantum
technology
is
now
at
a
point
where
practical
work
can
begin
on
creating
the
quantum
internet.
However,
numerous
challenges
must
be
overcome
before
this
vision
becomes
reality.
A
global-scale
internet
requires
development
of
repeater,
device
that
stores
and
manipulates
qubits
while
interacting
with
or
emitting
entangled
photons.
This
review
examines
different
approaches
to
repeaters
networks,
covering
their
conceptual
frameworks,
architectures,
current
progress
in
experimental
implementation.
Physical Review Letters,
Год журнала:
2021,
Номер
126(21)
Опубликована: Май 27, 2021
Ternary
quantum
processors
offer
significant
potential
computational
advantages
over
conventional
qubit
technologies,
leveraging
the
encoding
and
processing
of
information
in
qutrits
(three-level
systems).
To
evaluate
compare
performance
such
emerging
hardware
it
is
essential
to
have
robust
benchmarking
methods
suitable
for
a
higher-dimensional
Hilbert
space.
We
demonstrate
extensions
industry
standard
randomized
(RB)
protocols,
developed
used
extensively
qubits,
ternary
logic.
Using
superconducting
five-qutrit
processor,
we
find
an
average
single-qutrit
process
infidelity
$3.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$.
Through
interleaved
RB,
characterize
few
relevant
gates,
employ
simultaneous
RB
fully
crosstalk
errors.
Finally,
apply
cycle
two-qutrit
CSUM
gate
obtain
fidelity
0.85.
Our
results
present
RB-based
tools
qutrit
general
approach
diagnose
control
errors
future
qudit
hardware.
Structured
light
has
become
topical
of
late,
where
controlling
in
all
its
degrees
freedom
offered
novel
states
long
predicted,
enhanced
functionality
applications,
and
a
modern
toolbox
for
probing
fundamental
science.
Structuring
as
single
photons
entangled
allows
the
spatial
modes
to
be
used
encode
large
alphabet,
accessing
high
dimensional
Hilbert
spaces
tests
quantum
mechanics
improved
information
processing
tasks.
In
this
tutorial,
we
outline
basic
concepts
expressed
basis
(structured
light)
explain
how
create,
control,
detect
such
laboratory
with
focus
on
transverse
orbital
angular
momentum
pixel
(position)
modes.
Finally,
highlight
some
example
applications
structured
light,
from
communications
imaging.
IEEE Communications Surveys & Tutorials,
Год журнала:
2023,
Номер
25(4), С. 2133 - 2189
Опубликована: Янв. 1, 2023
Over
the
past
few
decades,
significant
progress
has
been
made
in
quantum
information
technology,
from
theoretical
studies
to
experimental
demonstrations.
Revolutionary
applications
are
now
limelight,
showcasing
advantages
of
technology
and
becoming
a
research
hotspot
academia
industry.
To
enable
have
more
profound
impact
wider
application,
interconnection
multiple
nodes
through
channels
becomes
essential.
Building
an
entanglement-assisted
network,
capable
realizing
transmission
between
these
nodes,
is
primary
goal.
However,
networks
governed
by
unique
laws
mechanics,
such
as
superposition
principle,
no-cloning
theorem,
entanglement,
setting
them
apart
classical
networks.
Consequently,
fundamental
efforts
required
establish
While
some
insightful
surveys
paved
way
for
networks,
most
focus
on
enabling
technologies
applications,
neglecting
critical
network
issues.
In
response,
this
paper
presents
comprehensive
survey
Alongside
reviewing
mechanics
technologies,
provides
detailed
overview
structure,
working
principles,
development
stages,
highlighting
differences
Additionally,
challenges
building
wide-area
addressed.
Furthermore,
emphasizes
open
directions,
including
architecture
design,
entanglement-based
issues,
standardization,
facilitate
implementation
future
Physical Review Applied,
Год журнала:
2023,
Номер
19(6)
Опубликована: Июнь 7, 2023
Processing
quantum
information
using
three-level
systems
or
qutrits
as
the
fundamental
unit
is
an
alternative
to
contemporary
qubit-based
architectures
with
potential
provide
significant
computational
advantages.
We
demonstrate
a
fully
programmable
two-qutrit
processor
by
utilizing
third
energy
eigenstates
of
two
transmons.
develop
parametric
coupler
achieve
excellent
connectivity
in
nine-dimensional
Hilbert
space
enabling
efficient
implementations
gates.
characterize
our
realizing
several
algorithms
like
Deutsch-Jozsa,
Bernstein-Vazirani,
and
Grover's
search.
Our
hardware-efficient
protocols
allow
us
show
that
stages
amplification
can
improve
success
rates
unstructured
search
advantage.
results
pave
way
for
building
ternary
processors
transmons
blocks
universal
computer.