Practical and useful quantum information processing (QIP) requires
significant improvements with respect to current systems, both in the error
rates of basic operations and in scale. Individual trapped-ion qubits'
fundamental qualities are promising for long-term systems, but the optics
involved in their precise control are a barrier to scaling. Integration of
optics into ion traps can make such systems simultaneously more robust and
parallelizable, as suggested by previous work with single ions. Here we use
scalable planar-fabricated optics to achieve high-fidelity multi-ion quantum
logic gates, often the limiting elements in building up the precise,
large-scale entanglement essential to quantum computation. Light is efficiently
delivered to a trap chip in a cryogenic environment via direct fiber coupling
on multiple channels, eliminating the need for beam alignment into vacuum
systems and cryostats and lending robustness to vibrations and beam pointing
drifts. This allows us to perform ground-state laser cooling of ion motion, and
implement gates generating two-ion entangled states with fidelities
$>99.3(2)\%$. This work demonstrates hardware that reduces noise and drifts in
sensitive quantum logic, and simultaneously offers a route to practical
parallelization for high-fidelity quantum processors. Similar devices may also
find applications in neutral atom and ion-based quantum-sensing and
timekeeping.
%0 Generic
%1 mehta2020integrated
%A Mehta, Karan K.
%A Zhang, Chi
%A Malinowski, Maciej
%A Nguyen, Thanh-Long
%A Stadler, Martin
%A Home, Jonathan P.
%D 2020
%K experiment ions
%T Integrated optical multi-ion quantum logic
%U http://arxiv.org/abs/2002.02258
%X Practical and useful quantum information processing (QIP) requires
significant improvements with respect to current systems, both in the error
rates of basic operations and in scale. Individual trapped-ion qubits'
fundamental qualities are promising for long-term systems, but the optics
involved in their precise control are a barrier to scaling. Integration of
optics into ion traps can make such systems simultaneously more robust and
parallelizable, as suggested by previous work with single ions. Here we use
scalable planar-fabricated optics to achieve high-fidelity multi-ion quantum
logic gates, often the limiting elements in building up the precise,
large-scale entanglement essential to quantum computation. Light is efficiently
delivered to a trap chip in a cryogenic environment via direct fiber coupling
on multiple channels, eliminating the need for beam alignment into vacuum
systems and cryostats and lending robustness to vibrations and beam pointing
drifts. This allows us to perform ground-state laser cooling of ion motion, and
implement gates generating two-ion entangled states with fidelities
$>99.3(2)\%$. This work demonstrates hardware that reduces noise and drifts in
sensitive quantum logic, and simultaneously offers a route to practical
parallelization for high-fidelity quantum processors. Similar devices may also
find applications in neutral atom and ion-based quantum-sensing and
timekeeping.
@misc{mehta2020integrated,
abstract = {Practical and useful quantum information processing (QIP) requires
significant improvements with respect to current systems, both in the error
rates of basic operations and in scale. Individual trapped-ion qubits'
fundamental qualities are promising for long-term systems, but the optics
involved in their precise control are a barrier to scaling. Integration of
optics into ion traps can make such systems simultaneously more robust and
parallelizable, as suggested by previous work with single ions. Here we use
scalable planar-fabricated optics to achieve high-fidelity multi-ion quantum
logic gates, often the limiting elements in building up the precise,
large-scale entanglement essential to quantum computation. Light is efficiently
delivered to a trap chip in a cryogenic environment via direct fiber coupling
on multiple channels, eliminating the need for beam alignment into vacuum
systems and cryostats and lending robustness to vibrations and beam pointing
drifts. This allows us to perform ground-state laser cooling of ion motion, and
implement gates generating two-ion entangled states with fidelities
$>99.3(2)\%$. This work demonstrates hardware that reduces noise and drifts in
sensitive quantum logic, and simultaneously offers a route to practical
parallelization for high-fidelity quantum processors. Similar devices may also
find applications in neutral atom and ion-based quantum-sensing and
timekeeping.},
added-at = {2020-02-25T10:28:52.000+0100},
author = {Mehta, Karan K. and Zhang, Chi and Malinowski, Maciej and Nguyen, Thanh-Long and Stadler, Martin and Home, Jonathan P.},
biburl = {https://www.bibsonomy.org/bibtex/28af8f235d5214174ddf536d0467d18d4/marschu},
interhash = {dc34b333abb40e31d91bb3e66a1b4e12},
intrahash = {8af8f235d5214174ddf536d0467d18d4},
keywords = {experiment ions},
note = {cite arxiv:2002.02258},
timestamp = {2020-02-25T10:28:52.000+0100},
title = {Integrated optical multi-ion quantum logic},
url = {http://arxiv.org/abs/2002.02258},
year = 2020
}