Annalen der Physik,
Journal Year:
2024,
Volume and Issue:
536(8)
Published: June 9, 2024
Abstract
In
this
work,
a
scheme
to
protect
quantum
entanglement
from
non‐Markovian
noisy
environment
is
proposed.
By
applying
two
weak
measurements
before
and
after
sending
the
state
into
channel,
can
be
“pushed”
closer
decoherence‐free
state,
reducing
decoherence
during
time
evolution.
Then,
second
measurement
partially
retrieve
initial
corrupted
by
environment.
The
study
involves
dynamic
equation
examine
impact
of
memory
effect
on
protection
scheme's
performance.
Various
factors
affecting
residual
success
probability
are
analyzed.
results
suggest
that
strengths
shall
chosen
approximately
in
linear
relation,
with
best
ratio
determined
Additionally,
it
demonstrated
significantly
enhances
efficiency.
Lastly,
robustness
against
systematic
errors
evaluated.
Physical Review Letters,
Journal Year:
2024,
Volume and Issue:
132(9)
Published: Feb. 27, 2024
The
quantum
battery
(QB)
makes
use
of
effects
to
store
and
supply
energy,
which
may
outperform
its
classical
counterpart.
However,
there
are
two
challenges
in
this
field.
One
is
that
the
environment-induced
decoherence
causes
energy
loss
aging
QB,
other
decreasing
charger-QB
coupling
strength
with
increasing
their
distance
charging
QB
become
inefficient.
Here,
we
propose
a
scheme
realize
remote
via
charger
rectangular
hollow
metal
waveguide.
It
found
an
ideal
realized
as
long
bound
states
formed
spectrum
total
system
consisting
charger,
electromagnetic
environment
Using
constructive
role
decoherence,
our
immune
aging.
Additionally,
without
resorting
direct
interaction,
works
way
long-range
wireless-like
charging.
Effectively
overcoming
challenges,
result
supplies
insightful
guideline
practical
realization
by
reservoir
engineering.
Physical review. A/Physical review, A,
Journal Year:
2023,
Volume and Issue:
107(2)
Published: Feb. 28, 2023
Quantum
battery
(QB)
is
the
miniature
energy
storage
and
release
device
plays
a
crucial
role
in
future
quantum
technology.
Here,
an
implementation
scheme
of
QB
proposed
on
superconducting
circuit
which
composed
by
$N$
coupled
transmon
qubits
one-dimensional
transmission
line
resonator.
We
derive
Hamiltonian
system
investigate
its
charging
performance
considering
three
decay
channels.
find
that
presence
channels
suppresses
high
oscillation
process,
thereby
realizing
stable
powerful
QB.
In
particular,
compared
with
resonator
qubit
relaxation,
dephasing
shows
counterintuitive
advantage
our
show
nearest
neighbor
interaction
always
have
positive
impact
coupling
only
significantly
influences
maximum
power
fully
nondegenerate
ground
state
region.
also
demonstrate
feasibility
approach
evaluating
under
experimental
parameters.
Physical review. A/Physical review, A,
Journal Year:
2024,
Volume and Issue:
109(2)
Published: Feb. 20, 2024
We
investigate
the
steady-state
charging
process
of
a
single-cell
quantum
battery
embedded
in
an
$N$-cell
star
network
qubits,
each
interacting
with
fermion
reservoir,
collectively
and
individually
equilibrium
nonequilibrium
scenarios,
respectively.
find
optimal
both
which
grows
monotonically
reservoirs'
chemical
potential
difference,
where
high
base
temperature
reservoirs
has
destructive
role
all
parameter
regimes.
indicate
that
regardless
strength
condition,
battery's
corresponding
reservoir
can
significantly
enhance
process.
On
other
hand,
weak-coupling
strongly
suppress
charging.
Consequently,
our
results
could
counteract
detrimental
effects
self-discharging
provide
valuable
guidelines
for
enhancing
stable
open
batteries
absence
external
field.
Physical review. A/Physical review, A,
Journal Year:
2022,
Volume and Issue:
106(3)
Published: Sept. 14, 2022
We
propose
a
cavity-Heisenberg
spin
chain
(CHS)
quantum
battery
(QB)
with
the
long-range
interactions
and
investigate
its
charging
process.
The
performance
of
CHS
QB
is
substantially
improved
compared
to
Heisenberg
(HS)
QB.
When
number
spins
$N
\gg
1$,
advantage
$\alpha$
QB's
maximum
power
can
be
obtained,
which
approximately
satisfies
superlinear
scaling
relation
$P_{max}
\propto
N^{\alpha}$.
For
QB,
reach
even
exceed
$1.5$,
while
HS
only
about
$\alpha=0.75$.
find
that
stored
energy
has
critical
phenomenon.
By
analyzing
Wigner
function,
von
Neumann
entropy,
logarithmic
negativity,
we
demonstrate
entanglement
necessary
ingredient
for
store
more
energy,
but
not
sufficient.
Physical review. A/Physical review, A,
Journal Year:
2024,
Volume and Issue:
109(6)
Published: June 24, 2024
Quantum
batteries
(QBs)
are
energy
storage
and
transfer
microdevices
that
open
up
new
possibilities
in
technology.
Here,
we
derive
a
resonator--multiple-qutrit
quantum
battery
(QB)
model
consisting
of
multimode
resonator
$N$
superconducting
transmon
qutrits.
We
investigate
the
charging
self-discharging
performances
QBs
discuss
roles
coherence
entanglement.
The
results
show
environment
noise
is
not
always
detrimental
for
QB
systems.
with
efficient
charging,
stable
energy-storage,
slow
processes
can
be
realized
by
considering
dephasing
manipulating
gap.
find
positively
related
to
entanglement
while
negatively
coherence.
phenomenon
vanishing
corresponds
dynamic
decoupling
behavior
QB's
steady
states.
Our
provide
way
realize
many-body
on
circuit
platform.
A
quantum
battery
(QB)
is
an
energy
storage
and
extraction
device
that
governed
by
the
principles
of
mechanics.
Here
we
propose
a
three-level
Dicke
QB
investigate
its
charging
process
considering
three
optical
states:
Fock
state,
coherent
squeezed
state.
The
performance
in
state
significantly
superior
to
or
We
show
locked
positively
related
entanglement
between
charger
battery,
diminishing
increases
ergotropy.
role
phase
transitions
system
analyzed
find
behavior
maximum
stored
jointly
determined
ground
excited-state
transitions.
further
demonstrate
that,
no
matter
what
initial
is,
can
be
completely
extracted
when
$N$
small
($N=10$),
far
below
thermodynamic
limit,
power
follows
consistent
with
energy.
New Journal of Physics,
Journal Year:
2024,
Volume and Issue:
26(1), P. 013024 - 013024
Published: Jan. 1, 2024
Abstract
We
propose
a
robust
and
high-fidelity
scheme
for
realizing
universal
quantum
gates
by
optimizing
short
pulse
sequences
in
three-level
system.
To
alleviate
the
sensitivity
to
errors,
we
recombine
all
elements
of
error
matrices
construct
cost
function
with
three
types
weight
factors.
The
modulation
parameters
are
obtained
searching
minimum
value
this
function.
purposes
introducing
factors
reduce
detrimental
impact
high-order
matrices,
suppress
population
leakage
third
state,
correct
operational
qubit
space,
optimize
total
area
sequences.
results
demonstrate
that
optimized
exhibit
strong
robustness
against
errors
effectively
area.
Therefore,
work
presents
valuable
method
achieving
exceptional
high
speed
computations.
Physical review. A/Physical review, A,
Journal Year:
2024,
Volume and Issue:
109(3)
Published: March 4, 2024
Quantum
batteries
are
energy
storage
devices
that
satisfy
quantum-mechanical
principles.
How
to
obtain
analytical
solutions
for
quantum
battery
systems
and
achieve
a
full
charging
is
crucial
element
of
the
battery.
Here,
we
investigate
Rosen-Zener
with
$N$
two-level
systems,
which
includes
atomic
interactions
external
driving
field.
The
stored
energy,
changing
power,
fluctuations,
von
Neumann
entropy
(diagonal
entropy)
derived
by
employing
gauge
transformation.
We
demonstrate
process
can
be
achieved
when
field
strength
scanning
period
conforms
quantitative
relationship.
local
maximum
value
final
corresponds
minimum
values
fluctuations
diagonal
entropy.
Moreover,
find
interaction
induces
phase
transition
reaches
near
point.
Our
result
provides
an
insightful
theoretical
scheme
realize
efficient
Journal of Physics A Mathematical and Theoretical,
Journal Year:
2023,
Volume and Issue:
56(27), P. 275302 - 275302
Published: June 2, 2023
We
present
an
analysis
of
the
availability
and
maximum
extractable
work
quantum
batteries
in
presence
charge
and/or
heat
steady-state
currents.
Quantum
are
modelled
as
non-interacting
open
systems
(mesoscopic
systems)
strongly
coupled
to
two
thermal
particle
reservoirs
within
framework
non-equilibrium
Green's
function
theory
a
regime.
found
that
battery
can
be
charged
manifestly
by
current
compared
one,
especially,
off-resonant
transport
It
allows
us
reliably
access
performance
high
bias-charging
