Quantum
information
science
gives
us
an
effective
language
to
describe
physical
phenomena
in
terms
of
the
evolution
of
information.
This
information
paradigm
allows
us
to
bring
new
solutions
to
old
problems,
for
example
to
the
task
of
cooling
a
physical
system.
While
we
usually
think
of
cooling
as
putting
a
hot
system
inside
a
refrigerator,
or
making
contact
with
a
cold
bath
that
cools
through
random
collisions
with
cold
molecules,
we
can
instead
think
of
cooling
as
processing
information.
A
natural
question
that
arises
is,
then,
can
we
use
tools
from
quantum
information
processing
to
turn
cooling
from
a
random
process
into
a
deterministic
one,
even
at
the
microscopic
level?
This
is
exactly
what
heat-bath
algorithmic
cooling
protocols
achieve.
Such
algorithms
can
efficiently
reach
lower
temperatures
than
conventional
cooling
techniques
and
aid
in
the
preparation
of
pure
states
out
of
mixed
ones,
an
important
task
for
quantum
technologies.
In
this
talk,
I
will
first
review
the
basic
ideas
of
algorithmic
cooling1
and
then
give
the
analytical
solution
for
the
achievable
cooling
limits
of
standard
heat-bath
algorithmic
cooling2.
Then,
I
will
show
how
these
limits
can
be
circumvented
by
taking
advantage
of
quantum
correlations
created
both
from
thermalization
with
the
heat-bath
and
from
internal
interactions3,
4.
References:
1
DK
Park,
NA
Rodriguez-Briones
,
G
Feng,
R
Rahimi,
J
Baugh,
and
R
Laflamme.
“Heat
bath
algorithmic
cooling
with
spins:
review
and
prospects”.
A
Book
Chapter
in
Electron
Spin
Resonance
(ESR)
Based
Quantum
Computing
(pp.
227-255).
Springer,
New
York,
NY.
(2016)
2
NA
Rodríguez-Briones
,
and
R
Laflamme.
"Achievable
polarization
for
heat-bath
algorithmic
cooling."
Phys.
Rev.
Lett.
116.17
(2016):
170501.
3
NA
Rodriguez-Briones
,
J
Li,
X
Peng,
T
Mor,
Y
Weinstein,
and
R
Laflamme.
"Heat-bath
algorithmic
cooling
with
correlated
qubit-environment
interactions."
New
Journal
of
Phys.
19,
no.
11
(2017):
113047.
4
NA
Rodríguez-Briones
,
E
Martín-Martínez,
A
Kempf,
and
Raymond
Laflamme.
"Correlation-enhanced
algorithmic
cooling."
Phys.
Rev.
Lett.
119,
no.
5
(2017):
050502.
Nayeli Rodriguez Briones is presenting this talk as a degree milestone in PhD Quantum Information.