296 citations · 593 across the 18 of their papers we have counts for
23 papers · 1 filter
Universality Sacrifices Reliability in Classical-Quantum Channel Coding
Kaito Watanabe, Masahito Hayashi, Takaya Matsuura +1
Universal channel coding enables communication without a complete description of the channel. For classical channels, universal codes can attain both capacity and the optimal high-…
Universal distillation of quantum entanglement
Ryuji Takagi, Kaito Watanabe, Takaya Matsuura +2
Distillable entanglement---the maximum rate of Bell states extractable from the given noisy entangled states via local operations and classical communication (LOCC)---has been a ce…
When Classical Correlations Certify Entanglement Recovery
Takeru Utsumi, Yota Tachibana, Yoshifumi Nakata +4
Entanglement and state distinguishability have long been central topics in quantum foundations. While each has developed into a rich subject in its own right, they can be connected…
Constant-rate quantum codes with low-weight stabilizers and full logical Clifford actions via transversal and fold-transversal gates
Takaya Matsuura, Yohji Chin, Shohei Kiryu +1
Low-space-overhead fault-tolerant quantum computation requires not only high-rate quantum error-correcting codes but also space-efficient implementations of logical operations. Tra…
All you need is the universal correlation detector: A unified approach to universalize communication protocols over quantum channels
Kaito Watanabe, Takaya Matsuura, Ryuji Takagi
Constructing optimal quantum information protocols without complete knowledge of the underlying states or channels is a central challenge. We address this challenge by developing u…
Universal classical-quantum channel resolvability and private channel coding
Takaya Matsuura, Masahito Hayashi, Min-Hsiu Hsieh
We address the problem of constructing fully universal private channel coding protocols for classical-quantum (c-q) channels. Previous work constructed universal decoding strategie…
Logical channel for heralded and pure loss with the Gottesman-Kitaev-Preskill code
Tom B. Harris, Takaya Matsuura, Ben Q. Baragiola +1
Photon loss is the dominant source of noise in optical quantum systems. The Gottesman-Kitaev-Preskill (GKP) bosonic code provides significant protection; however, even low levels o…
Asymptotically tight security analysis of quantum key distribution based on universal source compression
Takaya Matsuura, Shinichiro Yamano, Yui Kuramochi +2
Practical quantum key distribution (QKD) protocols require a finite-size security proof. The phase error correction (PEC) approach is one of the general strategies for security ana…
Continuous-Variable Fault-Tolerant Quantum Computation under General Noise
Takaya Matsuura, Nicolas C. Menicucci, Hayata Yamasaki
The quantum error-correcting code in the continuous-variable (CV) system attracts much attention due to its flexibility and high resistance against specific noise. However, the the…
Linear-optical quantum computation with arbitrary error-correcting codes
Blayney W. Walshe, Ben Q. Baragiola, Hugo Ferretti +11
High-rate quantum error correcting codes mitigate the imposing scale of fault-tolerant quantum computers but require efficient generation of non-local, many-body entanglement. We p…
Tight concentration inequalities for quantum adversarial setups exploiting permutation symmetry
Takaya Matsuura, Shinichiro Yamano, Yui Kuramochi +2
We developed new concentration inequalities for a quantum state on an -qudit system or measurement outcomes on it that apply to an adversarial setup, where an adversary prepares…
General treatment of Gaussian trusted noise in continuous variable quantum key distribution
Shinichiro Yamano, Takaya Matsuura, Yui Kuramochi +2
Continuous Variable (CV) quantum key distribution (QKD) is a promising candidate for practical implementations due to its compatibility with the existing communication technology.…
Equivalent noise properties of scalable continuous-variable cluster states
Blayney W. Walshe, Rafael N. Alexander, Takaya Matsuura +2
Optical continuous-variable cluster states (CVCSs) in combination with Gottesman-Kitaev-Preskill~(GKP) qubits enable fault-tolerant quantum computation so long as these resources a…
Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution
Takaya Matsuura, Shinichiro Yamano, Yui Kuramochi +2
Recent studies showed the finite-size security of binary-modulation CV-QKD protocols against general attacks. However, they gave poor key-rate scaling against transmission distance…
Decoding general error correcting codes and the role of complementarity
Yoshifumi Nakata, Takaya Matsuura, Masato Koashi
Among various classes of quantum error correcting codes (QECCs), non-stabilizer codes have rich properties and are of theoretical and practical interest. Decoding non-stabilizer co…
Finite-size security proof of binary-modulation continuous-variable quantum key distribution using only heterodyne measurement
Shinichiro Yamano, Takaya Matsuura, Yui Kuramochi +2
Continuous-variable quantum key distribution (CV-QKD) has many practical advantages including compatibility with current optical communication technology. Implementation using hete…
Fault-tolerant quantum computation with static linear optics
Ilan Tzitrin, Takaya Matsuura, Rafael N. Alexander +5
The scalability of photonic implementations of fault-tolerant quantum computing based on Gottesman-Kitaev-Preskill (GKP) qubits is injured by the requirements of inline squeezing a…
Efficient Concatenated Bosonic Code for Additive Gaussian Noise
Kosuke Fukui, Takaya Matsuura, Nicolas C. Menicucci
Bosonic codes offer noise resilience for quantum information processing. Good performance often comes at a price of complex decoding schemes, limiting their practicality. Here, we…
Blueprint for a Scalable Photonic Fault-Tolerant Quantum Computer
J. Eli Bourassa, Rafael N. Alexander, Michael Vasmer +10
Photonics is the platform of choice to build a modular, easy-to-network quantum computer operating at room temperature. However, no concrete architecture has been presented so far…
Finite-size security of continuous-variable quantum key distribution with digital signal processing
Takaya Matsuura, Kento Maeda, Toshihiko Sasaki +1
In comparison to conventional discrete-variable (DV) quantum key distribution (QKD), continuous-variable (CV) QKD with homodyne/heterodyne measurements has distinct advantages of l…
Cost-Reduced All-Gaussian Universality with the Gottesman-Kitaev-Preskill Code: Resource-Theoretic Approach to Cost Analysis
Hayata Yamasaki, Takaya Matsuura, Masato Koashi
The Gottesman-Kitaev-Preskill (GKP) quantum error-correcting code has emerged as a key technique in achieving fault-tolerant quantum computation using photonic systems. Whereas [Ba…
Equivalence of approximate Gottesman-Kitaev-Preskill codes
Takaya Matsuura, Hayata Yamasaki, Masato Koashi
The Gottesman-Kitaev-Preskill (GKP) quantum error correcting code attracts much attention in continuous variable (CV) quantum computation and CV quantum communication due to the si…
Refined security proof of the round-robin differential phase shift quantum key distribution and its improved performance in the finite-sized case
Takaya Matsuura, Toshihiko Sasaki, Masato Koashi
Among many quantum key distribution (QKD) protocols, the round-robin differential phase shift (RRDPS) protocol is unique in that it can upper-bound the amount of the information le…