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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.…
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…
Time-Efficient Constant-Space-Overhead Fault-Tolerant Quantum Computation
Hayata Yamasaki, Masato Koashi
Scaling up quantum computers to attain substantial speedups over classical computing requires fault tolerance. Conventionally, protocols for fault-tolerant quantum computation dema…
Optimal supplier of single-error-type entanglement via coherent-state transmission
Koji Azuma, Nobuyuki Imoto, Masato Koashi
Compared with entanglement with multiple types of noise, entanglement including only one type of error is a favorable fundamental resource not only for quantum communication but al…