91 citations · 565 across the 25 of their papers we have counts for
25 papers
Deterministic QKD source robust against side-channel attacks
Kiyoshi Tamaki, Marcos Curty, Akihiro Mizutani +1
Quantum key distribution (QKD) is secure in principle, but practical security can be undermined by discrepancies between real devices and the idealized models assumed in security p…
Phase-error estimation for quantum key distribution with leaky receivers
Álvaro Navarrete, Margarida Pereira, Guillermo Currás-Lorenzo +3
Practical quantum key distribution (QKD) receivers may leak information about their measurement outcomes and settings to the channel (e.g., through detector backflashes or back-ref…
Loss-tolerant quantum key distribution with detection efficiency mismatch
Alessandro Marcomini, Akihiro Mizutani, Fadri Grünenfelder +2
Current implementations of quantum key distribution (QKD) typically rely on prepare-and-measure (P&M) schemes. Unfortunately, these implementations are not completely secure, unles…
Tight scaling of key rate for differential-phase-shift quantum key distribution
Akihiro Mizutani, Toyohiro Tsurumaru
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-…
Differential-phase-shift QKD with practical Mach-Zehnder interferometer
Akihiro Mizutani, Masanori Terashita, Junya Matsubayashi +4
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…
Quantum key distribution with unbounded pulse correlations
Margarida Pereira, Guillermo Currás-Lorenzo, Akihiro Mizutani +3
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 secu…
Finite-key security analysis of differential-phase-shift quantum key distribution
Akihiro Mizutani, Yuki Takeuchi, Kiyoshi Tamaki
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 detec…
Modified BB84 quantum key distribution protocol robust to source imperfections
Margarida Pereira, Guillermo Currás-Lorenzo, Álvaro Navarrete +4
The Bennett-Brassard 1984 (BB84) protocol is the most widely implemented quantum key distribution (QKD) scheme. However, despite enormous theoretical and experimental efforts in th…
Rewindable Quantum Computation and Its Equivalence to Cloning and Adaptive Postselection
Ryo Hiromasa, Akihiro Mizutani, Yuki Takeuchi +1
We define rewinding operators that invert quantum measurements. Then, we define complexity classes , , and as sets of decision problems s…
Characterisation of state-preparation uncertainty in quantum key distribution
Anqi Huang, Akihiro Mizutani, Hoi-Kwong Lo +2
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-princi…
Computational self-testing for entangled magic states
Akihiro Mizutani, Yuki Takeuchi, Ryo Hiromasa +2
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…
Security of round-robin differential-phase-shift quantum key distribution protocol with correlated light sources
Akihiro Mizutani, Go Kato
Among various quantum key distribution (QKD) protocols, the round-robin differential-phase-shift (RRDPS) protocol has a unique feature that its security is guaranteed without monit…
Quantum key distribution with any two independent and identically distributed states
Akihiro Mizutani
To prove the security of quantum key distribution (QKD) protocols, several assumptions have to be imposed on users' devices. From an experimental point of view, it is preferable th…
Quantum key distribution with correlated sources
Margarida Pereira, Go Kato, Akihiro Mizutani +2
In theory, quantum key distribution (QKD) offers information-theoretic security. In practice, however, it does not due to the discrepancies between the assumptions used in the secu…
Quantum key distribution with simply characterized light sources
Akihiro Mizutani, Toshihiko Sasaki, Yuki Takeuchi +2
To guarantee the security of quantum key distribution (QKD), several assumptions on light sources must be satisfied. For example, each random bit information is precisely encoded o…
Resource-efficient verification of quantum computing using Serfling's bound
Yuki Takeuchi, Atul Mantri, Tomoyuki Morimae +2
Verifying quantum states is central to certifying the correct operation of various quantum information processing tasks. In particular, in measurement-based quantum computing, chec…
Quantum key distribution with setting-choice-independently correlated light sources
Akihiro Mizutani, Go Kato, Koji Azuma +6
Despite the enormous theoretical and experimental progress made so far in quantum key distribution (QKD), the security of most existing QKD implementations is not rigorously establ…
Information-theoretic security proof of differential-phase-shift quantum key distribution protocol based on complementarity
Akihiro Mizutani, Toshihiko Sasaki, Go Kato +2
We show the information-theoretic security proof of the differential-phase-shift (DPS) quantum key distribution (QKD) protocol based on the complementarity approach [arXiv:0704.366…
Differential-phase-shift quantum key distribution protocol with small number of random delays
Yuki Hatakeyama, Akihiro Mizutani, Go Kato +2
The differential-phase-shift (DPS) quantum key distribution (QKD) protocol was proposed aiming at simple implementation, but it can tolerate only a small disturbance in a quantum c…
Security of quantum key distribution with iterative sifting
Kiyoshi Tamaki, Hoi-Kwong Lo, Akihiro Mizutani +4
Several quantum key distribution (QKD) protocols employ iterative sifting. After each quantum transmission round, Alice and Bob disclose part of their setting information (includin…
Security of quantum key distribution with non-I.I.D. light sources
Yuichi Nagamatsu, Akihiro Mizutani, Rikizo Ikuta +3
Although quantum key distribution (QKD) is theoretically secure, there is a gap between the theory and practice. In fact, real-life QKD may not be secure because component devices…
Fundamental rate-loss tradeoff for the quantum internet
Koji Azuma, Akihiro Mizutani, Hoi-Kwong Lo
The quantum internet holds promise for performing quantum communication, such as quantum teleportation and quantum key distribution (QKD), freely between any parties all over the g…
Robustness of round-robin differential-phase-shift quantum-key-distribution protocol against source flaws
Akihiro Mizutani, Nobuyuki Imoto, Kiyoshi Tamaki
Recently, a new type of quantum key distribution, called the round-robin differential phase-shift (RRDPS) protocol [Nature 509, 475 (2014)], was proposed, where the security can be…
Finite-key security analysis of quantum key distribution with imperfect light sources
Akihiro Mizutani, Marcos Curty, Charles Ci Wen Lim +2
In recent years, the gap between theory and practice in quantum key distribution (QKD) has been significantly narrowed, particularly for QKD systems with arbitrarily awed optical r…