Zobrazeno 1 - 10
of 248
pro vyhledávání: '"Mizutani Akihiro"'
Autor:
Marcomini, Alessandro, Mizutani, Akihiro, Grünenfelder, Fadri, Curty, Marcos, Tamaki, Kiyoshi
Current implementations of quantum key distribution (QKD) typically rely on prepare-and-measure (P&M) schemes. Unfortunately, these implementations are not completely secure, unless security proofs fully incorporate all imperfections of real devices.
Externí odkaz:
http://arxiv.org/abs/2412.09684
Autor:
Mizutani, Akihiro, Terashita, Masanori, Matsubayashi, Junya, Mori, Shogo, Matsukura, Ibuki, Tagawa, Suzuna, Tamaki, Kiyoshi
Publikováno v:
Quantum Science and Technology 9, 045042 (2024)
Differential-phase-shift (DPS) quantum key distribution stands as a promising protocol due to its simple implementation, which can be realized with a train of coherent pulses and a passive measurement unit. To implement the DPS protocol, it is crucia
Externí odkaz:
http://arxiv.org/abs/2405.11760
Autor:
Mizutani, Akihiro, Tsurumaru, Toyohiro
The performance of quantum key distribution (QKD) protocols is evaluated based on the ease of implementation and key generation rate. Among major protocols, the differential-phase-shift (DPS) protocol has the advantage of simple implementation using
Externí odkaz:
http://arxiv.org/abs/2405.10033
Autor:
Takeuchi, Yuki, Mizutani, Akihiro
Verification of quantum computation is a task to efficiently check whether an output given from a quantum computer is correct. Existing verification protocols conducted between a quantum computer to be verified and a verifier necessitate quantum comm
Externí odkaz:
http://arxiv.org/abs/2403.14142
Autor:
Pereira, Margarida, Currás-Lorenzo, Guillermo, Mizutani, Akihiro, Rusca, Davide, Curty, Marcos, Tamaki, Kiyoshi
Publikováno v:
Quantum Sci. Technol. 10 015001 (2024)
A prevalent issue in practical applications of quantum key distribution (QKD) is the emergence of correlations among the emitted signals. Although recent works have proved the security of QKD in the presence of this imperfection, they rest on the pre
Externí odkaz:
http://arxiv.org/abs/2402.08028
Publikováno v:
Phys. Rev. Research 5, 023132 (2023)
Differential-phase-shift (DPS) quantum key distribution (QKD) is one of the major QKD protocols that can be implemented with a simple setup using a laser source and a passive detection unit. Recently, an information-theoretic security proof of this p
Externí odkaz:
http://arxiv.org/abs/2301.09844
Autor:
Pereira, Margarida, Currás-Lorenzo, Guillermo, Navarrete, Álvaro, Mizutani, Akihiro, Kato, Go, Curty, Marcos, Tamaki, Kiyoshi
Publikováno v:
Phys. Rev. Research 5, 023065 (2023)
The Bennett-Brassard 1984 (BB84) protocol is the most widely implemented quantum key distribution (QKD) scheme. However, despite enormous theoretical and experimental efforts in the past decades, the security of this protocol with imperfect sources h
Externí odkaz:
http://arxiv.org/abs/2210.11754
Publikováno v:
Proceedings of the 18th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2023), pp. 9:1-9:23, 2023
We define rewinding operators that invert quantum measurements. Then, we define complexity classes ${\sf RwBQP}$, ${\sf CBQP}$, and ${\sf AdPostBQP}$ as sets of decision problems solvable by polynomial-size quantum circuits with a polynomial number o
Externí odkaz:
http://arxiv.org/abs/2206.05434
Publikováno v:
Phys. Rev. Appl. 19, 014048 (2023)
To achieve secure quantum key distribution, all imperfections in the source unit must be incorporated in a security proof and measured in the lab. Here we perform a proof-of-principle demonstration of the experimental techniques for characterising th
Externí odkaz:
http://arxiv.org/abs/2205.11870
Publikováno v:
Phys. Rev. A 106, L010601 (2022)
In the seminal paper [Metger and Vidick, Quantum '21], they proposed a computational self-testing protocol for Bell states in a single quantum device. Their protocol relies on the fact that the target states are stabilizer states, and hence it is hig
Externí odkaz:
http://arxiv.org/abs/2111.02700