1 citations · 3 across the 15 of their papers we have counts for
19 papers · 1 filter
Low-nonlinearity advantage of hollow-core fiber for wavelength multiplexing of quantum entanglement and classical DWDM signals
Hikaru Shimizu, Arisa Ohno, Mao Miyasugi +7
Coexistence of classical and quantum light in optical fiber is a key requirement for scalable quantum networks. However, it is fundamentally limited by nonlinear crosstalk from int…
Remote Gottesman-Kitaev-Preskill Entanglement Generation between Trapped Ions
Haruki Aoki, Kazufumi Tanji, Shohei Kiryu +2
Distributing entanglement directly between error-corrected logical qubits is an important capability for scalable quantum networks. We propose a heralded protocol for generating re…
Efficient Simulation of Hybrid Continuous- and Discrete-Variable Quantum Circuits via Gaussian Decompositions
Kazufumi Tanji, Dot Belin Pio, Shohei Kiryu +2
Hybrid quantum systems combining discrete-variable (DV) and continuous-variable (CV) subsystems arise across a broad range of physical platforms and enable quantum information proc…
Improving the Loss Tolerance of Heralded Photonic GHZ States for Long-Distance Device-Independent Conference Key Agreement
Yazeed K. Alwehaibi, Makoto Ishihara, Shakib Daryanoosh +6
Heralded multipartite entanglement distribution is a key requirement for device-independent conference key agreement (DI-CKA) over lossy quantum networks. Although locally equivale…
Symmetry-resolved tree tensor network analysis of Bell-state discrimination with ancilla-assisted passive linear optics
Anand Kumar, Wojciech Roga, Devendra Kumar Mishra +1
Ancillary photons allow passive linear-optical Bell-state discrimination to exceed the one-half probability of success limit achievable with vacuum auxiliary modes. For a fixed ana…
Enhancing noise robustness in device-independent conference key agreement with asymmetric parity-CHSH inequalities
Makoto Ishihara, Wojciech Roga, Jonatan Bohr Brask +1
Conference key agreement allows multiple remote parties to establish a shared secret key with information-theoretical security. In device-independent conference key agreement, secu…
Fundamental limits of parameter estimation with heralded optical non-Gaussian states generated from Gaussian resources
Shohei Kiryu, Kazufumi Tanji, Yoshihiro Ueda +2
Non-Gaussian states can exhibit large quantum Fisher information (QFI) in quantum sensing. In optical systems, however, its generation is often probabilistic via the boson-sampling…
Information geometric quantification of effective privacy in quantum metrology
Luca Bianchi, Shimpei Yamaguchi, Wojciech Roga +2
Privacy of a quantum metrological protocol concerns the extent to which single parameters can be kept inaccessible to an observer or to other users of the network. In this work, an…
Linear-optical generation of hybrid GKP entanglement from small-amplitude cat states
Shohei Kiryu, Yohji Chin, Masahiro Takeoka +1
Hybrid bosonic codes combining bosonic codes with photon states offer a promising pathway for fault-tolerant quantum computation. However, the efficient generation of such states i…
Multipartite device-independent quantum key distribution using W states
Makoto Ishihara, Wojciech Roga, Masahiro Takeoka
Multipartite device-independent quantum key distribution (DI-QKD), also known as device-independent conference key agreement, enables more than two remote parties to share a common…
Fault-tolerant modular quantum computing with surface codes using single-shot emission-based hardware
Siddhant Singh, Rikiya Kashiwagi, Kazufumi Tanji +4
Fault-tolerant modular quantum computing requires stabilizer measurements across the modules in a quantum network. For this, entangled states of high quality and rate must be distr…
Demonstration of sequential processors with quantum advantage and analysis of classical performance limits
Shota Tateishi, Wenhao Wang, Baptiste Chevalier +3
In this paper, we theoretically and experimentally analyze sequential processors with limited communication between parts. We compare the expressivity of sequential quantum and cla…
Privacy in continuous-variable distributed quantum sensing
A. de Oliveira Junior, Anton L. Andersen, Benjamin Lundgren Larsen +5
Can a distributed network of quantum sensors estimate a global parameter while protecting every locally encoded value? We answer this question affirmatively by introducing and anal…
Long-distance device-independent quantum key distribution with standard optics tools
Makoto Ishihara, Anthony Brendan, Wojciech Roga +2
Device-independent quantum key distribution (DI-QKD) enables information-theoretically secure key exchange between remote parties without any assumptions on the internal workings o…
Improving the Rate-Loss Scaling in Polarization Entanglement Distribution using Single-Click Entanglement Swapping
Hikaru Shimizu, Joe Yoshimoto, Daiki Ichii +3
Polarization entanglement is widely used in optical quantum information processing due to its compatibility with standard optical components. On the other hand, it is known that po…
High-rate qutrit entanglement swapping with photon-number-basis
Kazufumi Tanji, Hikaru Shimizu, Masahiro Takeoka
Entanglement generation between distant nodes is a fundamental process in distributed quantum information processing. Qudits, high-dimensional quantum states, are promising candida…
Experimental investigation of single qubit quantum classifier with small number of samples
Shunsuke Abe, Shota Tateishi, Roga Wojciech +2
We experimentally investigated a single-qubit quantum classifier implemented on a silicon photonic integrated circuit, focusing on its performance under photon-limited conditions.…
Long-Distance Device-Independent Conference Key Agreement
Makoto Ishihara, Anders J. E. Bjerrum, Wojciech Roga +3
Device-independent quantum key distribution (DI-QKD) enables two remote parties to share an information-theoretically secure key without any assumptions on the inner workings of th…
Private quantum network sensing with efficient multi-partite entanglement distribution via lossy channels
Yoshihiro Ueda, Makoto Ishihara, Wojciech Roga +1
Quantum network sensing shows potential to enhance the estimation precision for functions of spatially distributed parameters beyond the shot noise limit. The key resource required…