المؤلفون: Li, G., Liu, J., Wang, Q., Sun, W.

المصدر: IEEE Communications Letters IEEE Commun. Lett. Communications Letters, IEEE. 28(3):473-477 Mar, 2024

المؤلفون: Mnaymneh, Khaled, Yeung, Edith, Northeast, David B., Jin, Jeongwan, Laferriere, Patrick, Haffouz, Sofiane, Poole, Philip J., Dalacu, Dan, Williams, Robin L.

المصدر: 2023 23rd International Conference on Transparent Optical Networks (ICTON) Transparent Optical Networks (ICTON), 2023 23rd International Conference on. :1-3 Jul, 2023

Relation: 2023 23rd International Conference on Transparent Optical Networks (ICTON)

المؤلفون: Heurtel, Nicolas, Mansfield, Shane, Senellart, Jean, Valiron, Benoit

المصدر: 2022 IEEE International Conference on Quantum Computing and Engineering (QCE) QCE Quantum Computing and Engineering (QCE), 2022 IEEE International Conference on. :577-581 Sep, 2022

Relation: 2022 IEEE International Conference on Quantum Computing and Engineering (QCE)

المؤلفون: Peng, Zhen-wan, Shi, Run-hua^{Aff2, IDs11128024043572_cor2}, Ding, Ran, Zhang, Fei-fan

المصدر: Quantum Information Processing. 23(5)

المؤلفون: Elaganuru, Bashaiah, Resmi, M., Yalla, Ramachandrarao^{Aff1, IDs11082024067660_cor3}

المصدر: Optical and Quantum Electronics. 56(5)

المؤلفون: Meda, Alice, Clivati, Cecilia, Virzi, Salvatore, Donadello, Simone, Mura, Alberto, Levi, Filippo, Genovese, Marco, Degiovanni, Ivo, Calonico, Davide

المصدر: 2022 IEEE 15th Workshop on Low Temperature Electronics (WOLTE) Low Temperature Electronics (WOLTE), 2022 IEEE 15th Workshop on. :1-4 Jun, 2022

Relation: 2022 IEEE 15th Workshop on Low Temperature Electronics (WOLTE)

المؤلفون: Li, Michael, Anderson, Paul, Hawes, Kassandra, Al Maruf, Rubayet, Bajcsy, Michal

المصدر: 2023 Photonics North (PN) Photonics North (PN), 2023. :1-1 Jun, 2023

Relation: 2023 Photonics North (PN)

المؤلفون: Cardoso, Fernando Redivo, 1992

المساهمون: Predojević, Ana, Associate Professor, 1979, Villas-Bôas, Celso J., Associate Professor, Sanchez-Soto, Luis Lorenzo, Professor

مصطلحات موضوعية: Quantum Computation, Quantum Information, Single Photons, Quantum Interference, Computação Quântica, Informação Quântica, Interferência Quântica, Physics, fysik

الوصف: This work presents a collection of scientific research results in the field of quantum information. The first paper describes the mathematical properties of a particular type of state of light, called the two-mode squeezed state (TMSS). We have shown that it is possible to generate a superposition of such states with particular probability distributions, making them suitable for applications in quantum information. In particular, such states are effectively phase insensitive, a property that enables a larger extraction of information regarding a dynamical process. The second paper deals with an extensive discussion on the complexity of quantum algorithms. It was observed that while quantum algorithms can, under certain conditions, outperform classical algorithms in time or space complexity, some key steps such as state preparation and information retrieval are not always taken into account when analysing the complexity of quantum algorithms. For this reason, the aim of this study was to provide a complete complexity analysis for the implementation of quantum algorithms, considering different alternatives in terms of state preparation, quantum gate implementation and measurement techniques. We provide an asymptotic analysis of different algorithm implementation strategies. Finally, the last paper deals with the Hong-Ou-Mandel interference visibility of photons emitted in a cascade process. As a result of a two-photon excitation process, an entangled photon pair is emitted. This unwanted entanglement affects the coherence of the reduced single photon state, i.e. one of the photons emitted in the cascade process. As a result, the visibility of the Hong-Ou-Mandel interference is reduced. We show that, under certain conditions, it is possible to circumvent the restriction imposed by the time-energy entanglement by applying a post-selection method. The experimental results together with the theoretical framework are presented to provide a complete analysis of the method.
Este trabalho apresenta uma coleção de resultados de pesquisas científicas no campo da informação quântica. O primeiro artigo descreve as propriedades matemáticas de um tipo específico de estado da luz, chamado de estado comprimido de dois modos (TMSS). Mostramos que é possível gerar uma superposição de tais estados com distribuições de probabilidade específicas, o que os torna adequados para aplicações em informação quântica. Em particular, esses estados são efetivamente insensíveis à fase, propriedade que torna possível aumentar a quantidade de informação que pode ser extraída a respeito de um processo dinâmico. O segundo artigo aborda uma extensa discussão sobre a complexidade de algoritmos quânticos. Foi observado que embora, sob certas condições, os algoritmos quânticos possam superar os algoritmos clássicos em termos de tempo ou espaço, algumas etapas importantes como a preparação do estado e a recuperação de informação nem sempre são contabilizados na análise da complexidade dos algoritmos quânticos. Por esse motivo, o objetivo do estudo é fornecer uma análise completa da complexidade para a implementação de algoritmos quânticos, considerando diferentes alternativas com relação à preparação do estado, à implementação de portas quânticas e técnicas de medição. Apresentamos uma análise assintótica de diferentes estratégias para a implementação de algoritmos. Por fim, o último trabalho está relacionado à visibilidade da interferência de Hong-Ou-Mandel de fótons emitidos em um processo em cascata. Como resultado de um processo de excitação de dois fótons, um par de fótons emaranhados é emitido. Esse emaranhamento indesejado afeta a coerência do estado reduzido de um único fóton, ou seja, de um dos fótons emitidos no processo de cascata. Como resultado, a visibilidade da interferência de Hong-Ou-Mandel é reduzida. Mostramos que, sob certas condições, é possível contornar a restrição imposta pelo emaranhamento tempo-energia aplicando um método de pós-seleção. Os resultados experimentais, juntamente com a fundamentação teórica, são apresentados para fornecer uma análise completa do método.

وصف الملف: electronic

URL الوصول: https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-227873
https://su.diva-portal.org/smash/get/diva2:1847902/FULLTEXT01.pdf
https://su.diva-portal.org/smash/get/diva2:1847902/PREVIEW01.jpg

المؤلفون: Gao, Jun, Santos, Leonardo, Krishna, Govind, Xu, Ze-Sheng, Iovan, Adrian, Steinhauer, Stephan, Guhne, Otfried, Poole, Philip J., Dalacu, Dan, Zwiller, Val, Elshaari, Ali W.

المصدر: Nano Letters. 23(11):5350-5357

مصطلحات موضوعية: Nanowire Quantum Dots, Single Photons, MultipartiteEntanglement, W-State, Phase Retrieval, Gerchberg-Saxton Algorithm

الوصف: Quantum physics phenomena,entanglement and coherence,are crucialfor quantum information protocols, but understanding these in systemswith more than two parts is challenging due to increasing complexity.The W state, a multipartite entangled state, is notable for its robustnessand benefits in quantum communication. Here, we generate eight-modeon-demand single-photon W states, using nanowire quantum dots anda silicon nitride photonic chip. We demonstrate a reliable and scalabletechnique for reconstructing the W state in photonic circuits usingFourier and real-space imaging, supported by the Gerchberg-Saxtonphase retrieval algorithm. Additionally, we utilize an entanglementwitness to distinguish between mixed and entangled states, therebyaffirming the entangled nature of our generated state. The study providesa new imaging approach of assessing multipartite entanglement in Wstates, paving the way for further progress in image processing andFourier-space analysis techniques for complex quantum systems.

وصف الملف: print

URL الوصول: https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-331201
https://doi.org/10.1021/acs.nanolett.3c01551

المؤلفون: Naruse, Makoto, Uchida, Atsushi, Uchiyama, Kazuharu, Akahane, Kouichi

المصدر: 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC) OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022 27th. :1-2 Jul, 2022

Relation: 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC)