Active SU(2) operation on Poincaré sphere
Results in Physics,
Год журнала:
2024,
Номер
59, С. 107567 - 107567
Опубликована: Март 12, 2024
Язык: Английский
Photonic Angular Momentum in Intense Light–Matter Interactions
Photonics,
Год журнала:
2024,
Номер
11(9), С. 871 - 871
Опубликована: Сен. 17, 2024
Light
contains
both
spin
and
orbital
angular
momentum.
Despite
contributing
equally
to
the
total
photonic
momentum,
these
components
derive
from
quite
different
parts
of
electromagnetic
field
profile,
namely
its
polarization
spatial
variation,
respectively,
therefore
do
not
always
share
equal
influence
in
light–matter
interactions.
With
growing
interest
utilizing
light’s
momentum
practice
added
control
study
atomic
systems,
it
becomes
increasingly
important
for
students
researchers
understand
subtlety
involved
In
this
article,
we
present
a
review
fundamental
concepts
recent
experiments
related
interaction
beams
containing
with
atoms.
An
emphasis
is
placed
on
understanding
perspective
classical
waves
individual
photons.
We
then
application
experiments,
single-
few-photon
transitions,
strong-field
ionization,
high-harmonic
generation,
highlighting
role
atom’s
location
within
beam
profile
each
case.
Язык: Английский
Dirac equation for photons in a fibre: Origin of polarisation
Heliyon,
Год журнала:
2024,
Номер
10(7), С. e28367 - e28367
Опубликована: Март 22, 2024
Язык: Английский
Spin textures of coherent photons with SU(4) symmetry
Results in Physics,
Год журнала:
2024,
Номер
61, С. 107745 - 107745
Опубликована: Май 9, 2024
We
show
coherent
photons
with
spin
and
orbital
angular
momentum
have
symmetry
of
special
unitary
group
degree
four,
SU(4),
both
theoretically
experimentally.
the
polarisation
could
be
a
measure
to
characterise
quantum
coherency
state,
which
was
significantly
affected
by
partial
trace
out
freedom.
By
changing
amplitudes
classically
entangled
we
observed
crossover
from
Heisenberg
classical
Ising
spin.
also
demonstrated
projections
states,
recover
while
SU(4)
state
is
projected
simple
product
SU(2)×SU(2).
Based
on
developed
platform,
explored
texture
photons,
found
unique
profile
reminiscent
Bengal
cat
upon
wrapping
three-dimensional
sphere.
controlled
phase
between
singlet
triplet
states
rotated
increasing
phase.
Язык: Английский
SU(N) symmetry of coherent photons controlled by rotated waveplates
Heliyon,
Год журнала:
2024,
Номер
10(14), С. e34423 - e34423
Опубликована: Июль 1, 2024
The
coherent
state
from
a
laser
source
has
spin
and
orbital
degrees
of
freedom,
which
allow
an
arbitrary
superposition
among
orthogonal
states
with
varying
amplitudes
phases.
Here,
we
theoretically
show
photons
SU(N)
symmetry
are
characterised
by
expectation
values
angular
momentum
shown
on
hypersphere
in
SO(N2−1)
space.
To
demonstrate
expected
unitary
transformations
experiments,
have
constructed
generators
the
Lie
group
simply
combining
widely
available
optical
components
such
as
waveplates
vortex
lenses.
We
between
twisted
Gaussian
is
dynamics
topological
charge
upon
transformation
SU(3)
states.
also
realised
photonic
singlet
triplet
corresponding
to
SU(4)
states,
were
projected
SU(2)×SU(2)
passing
through
rotated
polariser.
Язык: Английский