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- The University of TokyoJP235 papers
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7 papers · 2 filters
Robust Unconditionally Secure Quantum Key Distribution with Two Nonorthogonal and Uninformative States
Marco Lucamarini, Giovanni Di Giuseppe, Kiyoshi Tamaki
We introduce a novel form of decoy-state technique to make the single-photon Bennett 1992 protocol robust against losses and noise of a communication channel. Two uninformative sta…
Geometrical aspects of weak measurements and quantum erasers
Shuhei Tamate, Hirokazu Kobayashi, Toshihiro Nakanishi +2
We investigate the mechanism of weak measurement by using an interferometric framework. In order to appropriately elucidate the interference effect that occurs in weak measurement,…
Public and private communication with a quantum channel and a secret key
Min-Hsiu Hsieh, Mark M. Wilde
We consider using a secret key and a noisy quantum channel to generate noiseless public communication and noiseless private communication. The optimal protocol for this setting is…
Measuring Qutrit-Qutrit Entanglement of Orbital Angular Momentum States of an Atomic Ensemble and a Photon
R. Inoue, T. Yonehara, Y. Miyamoto +2
Three-dimensional entanglement of orbital angular momentum states of an atomic qutrit and a single photon qutrit has been observed. Their full state was reconstructed using quantum…
Cooling and squeezing the fluctuations of a nanomechanical beam by indirect quantum feedback control
Jing Zhang, Yu-xi Liu, Franco Nori
We study cooling and squeezing the fluctuations of a nanomechanical beam using quantum feedback control. In our model, the nanomechanical beam is coupled to a transmission line res…
Perfect function transfer and interference effects in interacting boson lattices
Lian-Ao Wu, Adam Miranowicz, XiangBin Wang +2
We show how to perfectly transfer, without state initialization and remote collaboration, arbitrary functions in interacting boson lattices. We describe a possible implementation o…