The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform
Silvia Arroyocamejo - One of the best experts on this subject based on the ideXlab platform.
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universal high fidelity quantum gates based on superadiabatic geometric phases on a solid state spin qubit at room temperature
npj Quantum Information, 2018Co-Authors: Felix Kleisler, Andrii Lazariev, Silvia ArroyocamejoAbstract:Geometric phases and holonomies are a promising resource for the realization of high-fidelity quantum operations in noisy devices, due to their Intrinsic Fault-tolerance against parametric noise. However, for a long time their practical use in quantum computing was limited to proof of principle demonstrations. This was partly due to the need for adiabatic time evolution or the requirement of complex, high-dimensional state spaces and a large number of driving field parameters to achieve universal quantum gates employing holonomies. In 2016 Liang et al. proposed universal, superadiabatic, geometric quantum gates exploiting transitionless quantum driving, thereby offering fast and universal quantum gate performance on a simple two-level system. Here, we report on the experimental implementation of a set of non-commuting single-qubit superadiabatic, geometric quantum gates on the electron spin of the nitrogen-vacancy center in diamond under ambient conditions. This provides a promising and powerful tool for large-scale quantum computing under realistic, noisy experimental conditions. A demonstration of quantum logic gates based on geometric phases could enable quantum computing in noisy experimental conditions. Developing large-scale quantum computation requires the performance of quantum logic gates to be significantly improved. Quantum logic gates are very sensitive to noise but gates that exploit geometric phases are predicted to be resilient against a common source of noise. However, experimentally realising such strategies is not trivial. Using the electron spin of nitrogen-vacancy centers in diamond, Felix Kleisler and colleagues from the Max Planck Institute for Biophysical Chemistry in Gottingen, Germany demonstrate geometric phase-based quantum logic gates under ambient conditions. This implementation shows that such geometric quantum gates in combination with solid-spin qubit systems are a promising platform for realising large-scale quantum computing in noisy environments.
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universal high fidelity quantum gates based on superadiabatic geometric phases on a solid state spin qubit at room temperature
arXiv: Quantum Physics, 2018Co-Authors: Felix Kleisler, Andrii Lazariev, Silvia ArroyocamejoAbstract:Geometric phases and holonomies (their non-commuting generalizations) are a promising resource for the realization of high-fidelity quantum operations in noisy devices, due to their Intrinsic Fault-tolerance against noise and experimental imperfections. Despite their conceptual appeal and proven Fault-tolerance, for a long time their practical use in quantum computing was limited to proof of principle demonstrations. Only in 2012 Sj\"oqvist et al. formulated a strategy to generate non-Abelian (i.e. holonomic) quantum gates through non-adiabatic transformation. Successful experimental demonstrations of this concept followed on various physical qubit systems and proved the feasibility of this fast, holonomic quantum gate concept. Despite these successes, the experimental implementation of such non-Abelian quantum gates remains experimentally challenging since in general the emergence of a suitable holonomy requires encoding of the logical qubit within a three (or higher) level system being driven by two (or more) control fields. A very recent proposal by Liang et al. offers an elegant solution generating a non-Abelian, geometric quantum gate on a simple, two-level system driven by one control field. Exploiting the concept of transitionless quantum driving it allows the generation of universal geometric quantum gates through superadiabatic evolution. This concept thus generates fast and robust phase-based quantum gates on the basis of minimal experimental resources. Here, we report on the first such implementation of a set of non-commuting single-qubit superadiabatic geometric quantum gates on the electron spin of the negatively charged nitrogen vacancy center in diamond. The realized quantum gates combine high-fidelity and fast quantum gate performance. This provides a promising and powerful tool for large-scale quantum computing under realistic, noisy experimental conditions.
Massimo G Palma - One of the best experts on this subject based on the ideXlab platform.
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berry phase for a spin 1 2 particle in a classical fluctuating field
Physical Review Letters, 2003Co-Authors: Gabriele De Chiara, Massimo G PalmaAbstract:The Berry phase [1] and related geometrical phases[2,3] have received renewed interest in recent years due toseveral proposals for their use in the implementation ofquantum computing gates [4–14]. Such interest is moti-vated by the belief that geometric quantum gates shouldexhibit an Intrinsic Fault tolerance in the presence ofexternal noise. Such a belief is based on the heuristicargument that since Berry phases are geometrical in theirnature, i.e., proportional to the area spanned in parameterspace, they should be insensitive to any fluctuating per-turbation with zero average. Although this argumentseems convincing, to the best of our knowledge it hasnot yet been quantitatively probed. In particular, althoughseveral papers [15–17] have investigated aspects of Berryphases in the presence of quantum external noise, we arenot aware of any studies in which the effect of classicalnoise in a simple model of a qubit, namely a spin 1
Felix Kleisler - One of the best experts on this subject based on the ideXlab platform.
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universal high fidelity quantum gates based on superadiabatic geometric phases on a solid state spin qubit at room temperature
npj Quantum Information, 2018Co-Authors: Felix Kleisler, Andrii Lazariev, Silvia ArroyocamejoAbstract:Geometric phases and holonomies are a promising resource for the realization of high-fidelity quantum operations in noisy devices, due to their Intrinsic Fault-tolerance against parametric noise. However, for a long time their practical use in quantum computing was limited to proof of principle demonstrations. This was partly due to the need for adiabatic time evolution or the requirement of complex, high-dimensional state spaces and a large number of driving field parameters to achieve universal quantum gates employing holonomies. In 2016 Liang et al. proposed universal, superadiabatic, geometric quantum gates exploiting transitionless quantum driving, thereby offering fast and universal quantum gate performance on a simple two-level system. Here, we report on the experimental implementation of a set of non-commuting single-qubit superadiabatic, geometric quantum gates on the electron spin of the nitrogen-vacancy center in diamond under ambient conditions. This provides a promising and powerful tool for large-scale quantum computing under realistic, noisy experimental conditions. A demonstration of quantum logic gates based on geometric phases could enable quantum computing in noisy experimental conditions. Developing large-scale quantum computation requires the performance of quantum logic gates to be significantly improved. Quantum logic gates are very sensitive to noise but gates that exploit geometric phases are predicted to be resilient against a common source of noise. However, experimentally realising such strategies is not trivial. Using the electron spin of nitrogen-vacancy centers in diamond, Felix Kleisler and colleagues from the Max Planck Institute for Biophysical Chemistry in Gottingen, Germany demonstrate geometric phase-based quantum logic gates under ambient conditions. This implementation shows that such geometric quantum gates in combination with solid-spin qubit systems are a promising platform for realising large-scale quantum computing in noisy environments.
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universal high fidelity quantum gates based on superadiabatic geometric phases on a solid state spin qubit at room temperature
arXiv: Quantum Physics, 2018Co-Authors: Felix Kleisler, Andrii Lazariev, Silvia ArroyocamejoAbstract:Geometric phases and holonomies (their non-commuting generalizations) are a promising resource for the realization of high-fidelity quantum operations in noisy devices, due to their Intrinsic Fault-tolerance against noise and experimental imperfections. Despite their conceptual appeal and proven Fault-tolerance, for a long time their practical use in quantum computing was limited to proof of principle demonstrations. Only in 2012 Sj\"oqvist et al. formulated a strategy to generate non-Abelian (i.e. holonomic) quantum gates through non-adiabatic transformation. Successful experimental demonstrations of this concept followed on various physical qubit systems and proved the feasibility of this fast, holonomic quantum gate concept. Despite these successes, the experimental implementation of such non-Abelian quantum gates remains experimentally challenging since in general the emergence of a suitable holonomy requires encoding of the logical qubit within a three (or higher) level system being driven by two (or more) control fields. A very recent proposal by Liang et al. offers an elegant solution generating a non-Abelian, geometric quantum gate on a simple, two-level system driven by one control field. Exploiting the concept of transitionless quantum driving it allows the generation of universal geometric quantum gates through superadiabatic evolution. This concept thus generates fast and robust phase-based quantum gates on the basis of minimal experimental resources. Here, we report on the first such implementation of a set of non-commuting single-qubit superadiabatic geometric quantum gates on the electron spin of the negatively charged nitrogen vacancy center in diamond. The realized quantum gates combine high-fidelity and fast quantum gate performance. This provides a promising and powerful tool for large-scale quantum computing under realistic, noisy experimental conditions.
P Arefi - One of the best experts on this subject based on the ideXlab platform.
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practical considerations for implementing Intrinsic Fault recovery in embedded systems
World Congress on Computational Intelligence, 2008Co-Authors: C Jorgensen, Garrison W Greenwood, P ArefiAbstract:Evolvable hardware provides a viable Fault recovery technique for embedded systems already deployed into an operational environment. Typically the fitness of each evolved configuration in such systems must be Intrinsically determined because imprecise information about Faults makes extrinsic methods impractical. Most work on Intrinsic circuit evolution is conducted in laboratory environments where sophisticated measurement equipment is readily available and frequency domain analysis poses no real problems. In this paper we argue Intrinsic Fault recovery for embedded systems has to be done in the time domain. We report the results of several experiments conducted to identify potential problems with determining fitness in the time domain for embedded systems. We also discuss the limitations embedded systems impose on GAs used for evolvable hardware applications and suggest some possible solutions.
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IEEE Congress on Evolutionary Computation - Practical considerations for implementing Intrinsic Fault recovery in embedded systems
2008 IEEE Congress on Evolutionary Computation (IEEE World Congress on Computational Intelligence), 2008Co-Authors: C Jorgensen, Garrison W Greenwood, P ArefiAbstract:Evolvable hardware provides a viable Fault recovery technique for embedded systems already deployed into an operational environment. Typically the fitness of each evolved configuration in such systems must be Intrinsically determined because imprecise information about Faults makes extrinsic methods impractical. Most work on Intrinsic circuit evolution is conducted in laboratory environments where sophisticated measurement equipment is readily available and frequency domain analysis poses no real problems. In this paper we argue Intrinsic Fault recovery for embedded systems has to be done in the time domain. We report the results of several experiments conducted to identify potential problems with determining fitness in the time domain for embedded systems. We also discuss the limitations embedded systems impose on GAs used for evolvable hardware applications and suggest some possible solutions.
Andrii Lazariev - One of the best experts on this subject based on the ideXlab platform.
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universal high fidelity quantum gates based on superadiabatic geometric phases on a solid state spin qubit at room temperature
npj Quantum Information, 2018Co-Authors: Felix Kleisler, Andrii Lazariev, Silvia ArroyocamejoAbstract:Geometric phases and holonomies are a promising resource for the realization of high-fidelity quantum operations in noisy devices, due to their Intrinsic Fault-tolerance against parametric noise. However, for a long time their practical use in quantum computing was limited to proof of principle demonstrations. This was partly due to the need for adiabatic time evolution or the requirement of complex, high-dimensional state spaces and a large number of driving field parameters to achieve universal quantum gates employing holonomies. In 2016 Liang et al. proposed universal, superadiabatic, geometric quantum gates exploiting transitionless quantum driving, thereby offering fast and universal quantum gate performance on a simple two-level system. Here, we report on the experimental implementation of a set of non-commuting single-qubit superadiabatic, geometric quantum gates on the electron spin of the nitrogen-vacancy center in diamond under ambient conditions. This provides a promising and powerful tool for large-scale quantum computing under realistic, noisy experimental conditions. A demonstration of quantum logic gates based on geometric phases could enable quantum computing in noisy experimental conditions. Developing large-scale quantum computation requires the performance of quantum logic gates to be significantly improved. Quantum logic gates are very sensitive to noise but gates that exploit geometric phases are predicted to be resilient against a common source of noise. However, experimentally realising such strategies is not trivial. Using the electron spin of nitrogen-vacancy centers in diamond, Felix Kleisler and colleagues from the Max Planck Institute for Biophysical Chemistry in Gottingen, Germany demonstrate geometric phase-based quantum logic gates under ambient conditions. This implementation shows that such geometric quantum gates in combination with solid-spin qubit systems are a promising platform for realising large-scale quantum computing in noisy environments.
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universal high fidelity quantum gates based on superadiabatic geometric phases on a solid state spin qubit at room temperature
arXiv: Quantum Physics, 2018Co-Authors: Felix Kleisler, Andrii Lazariev, Silvia ArroyocamejoAbstract:Geometric phases and holonomies (their non-commuting generalizations) are a promising resource for the realization of high-fidelity quantum operations in noisy devices, due to their Intrinsic Fault-tolerance against noise and experimental imperfections. Despite their conceptual appeal and proven Fault-tolerance, for a long time their practical use in quantum computing was limited to proof of principle demonstrations. Only in 2012 Sj\"oqvist et al. formulated a strategy to generate non-Abelian (i.e. holonomic) quantum gates through non-adiabatic transformation. Successful experimental demonstrations of this concept followed on various physical qubit systems and proved the feasibility of this fast, holonomic quantum gate concept. Despite these successes, the experimental implementation of such non-Abelian quantum gates remains experimentally challenging since in general the emergence of a suitable holonomy requires encoding of the logical qubit within a three (or higher) level system being driven by two (or more) control fields. A very recent proposal by Liang et al. offers an elegant solution generating a non-Abelian, geometric quantum gate on a simple, two-level system driven by one control field. Exploiting the concept of transitionless quantum driving it allows the generation of universal geometric quantum gates through superadiabatic evolution. This concept thus generates fast and robust phase-based quantum gates on the basis of minimal experimental resources. Here, we report on the first such implementation of a set of non-commuting single-qubit superadiabatic geometric quantum gates on the electron spin of the negatively charged nitrogen vacancy center in diamond. The realized quantum gates combine high-fidelity and fast quantum gate performance. This provides a promising and powerful tool for large-scale quantum computing under realistic, noisy experimental conditions.
