155 citations · 290 across the 16 of their papers we have counts for
15 papers · 1 filter
Millisecond optical coherence and strong collective coupling in an integrated telecom rare-earth photonic platform
Kah Jen Wo, Pavel A. Dmitriev, Karthik Dasigi +2
Long-range quantum network nodes require the combination of strong light-matter coupling, long coherence times and in situ spectral control at telecom wavelengths. The coherence of…
Rigorous characterization of continuous-variable quantum states via optical parametric amplifiers
Manthan Badbaria, Fumiya Hanamura, Maxime Garnier +2
Characterizing non-Gaussian quantum states is of paramount importance for continuous-variable quantum information processing, yet conventional homodyne-measurement-based state tomo…
Inhomogeneous Light-Matter Coupling as a Resource for Noiseless Quantum Memories
Fumiya Hanamura, Sicheng Bao, Jie Lerk Yoo +2
Inhomogeneous ensembles of two-level systems are central to both fundamental light-matter physics and quantum-network applications. Understanding and optimizing ensemble-based quan…
Tuning Wave-Particle Duality of Quantum Light by Generalized Photon Subtraction
Kan Takase, Mamoru Endo, Fumiya Hanamura +11
Wave--particle duality is a hallmark of quantum mechanics. For bosonic systems, there exists a continuum of intermediate states bridging wave-like Schrödinger cat states and partic…
Single-shot conditional displacement gate between a trapped atom and traveling light
Seigo Kikura, Hayato Goto, Fumiya Hanamura +1
We propose a single-shot conditional displacement gate between a trapped atom as the control qubit and a traveling light pulse as the target oscillator, mediated by an optical cavi…
Beyond Stellar Rank: Control Parameters for Scalable Optical Non-Gaussian State Generation
Fumiya Hanamura, Kan Takase, Hironari Nagayoshi +6
Advanced quantum technologies rely on non-Gaussian states of light, essential for universal quantum computation, fault-tolerant error correction, and quantum sensing. Their practic…
Scalable Optical Quantum State Synthesizer with Dual-Mode Resonator Memory
Fumiya Hanamura, Kan Takase, Kazuki Hirota +12
Optical quantum computing is a promising approach for achieving large-scale quantum computation. While Gaussian operations have been successfully scaled, the inherently weak nonlin…
Implementing arbitrary multi-mode continuous-variable quantum gates with fixed non-Gaussian states and adaptive linear optics
Fumiya Hanamura, Warit Asavanant, Hironari Nagayoshi +5
Non-Gaussian quantum gates are essential components for optical quantum information processing. However, the efficient implementation of practically important multi-mode higher-ord…
Generation of Flying Logical Qubits using Generalized Photon Subtraction with Adaptive Gaussian Operations
Kan Takase, Fumiya Hanamura, Hironari Nagayoshi +6
The generation of a logical qubit called the Gottesman-Kitaev-Preskill qubit in an optical traveling wave is a major challenge for realizing large-scale universal fault-tolerant op…
Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator
Shunya Konno, Warit Asavanant, Fumiya Hanamura +14
A quantum computer with low-error, high-speed quantum operations and capability for interconnections is required for useful quantum computations. A logical qubit called Gottesman-K…
Single-shot single-mode optical two-parameter displacement estimation beyond classical limit
Fumiya Hanamura, Warit Asavanant, Seigo Kikura +8
Uncertainty principle prohibits the precise measurement of both components of displacement parameters in phase space. We have theoretically shown that this limit can be beaten usin…
Protecting the quantum interference of cat states by phase-space compression
Xiaozhou Pan, Jonathan Schwinger, Ni-Ni Huang +7
Cat states, with their unique phase-space interference properties, are ideal candidates for understanding fundamental principles of quantum mechanics and performing key quantum inf…
Nonlinear feedforward enabling quantum computation
Atsushi Sakaguchi, Shunya Konno, Fumiya Hanamura +9
Measurement-based quantum computation with optical time-domain multiplexing is a promising method to realize a quantum computer from the viewpoint of scalability. Fault tolerance a…
Non-Clifford gate on optical qubits by nonlinear feedforward
Shunya Konno, Warit Asavanant, Kosuke Fukui +6
In a continuous-variable optical system, the Gottesman-Kitaev-Preskill (GKP) qubit is a promising candidate for fault-tolerant quantum computation. To implement non-Clifford operat…
Estimation of Gaussian random displacement using non-Gaussian states
Fumiya Hanamura, Warit Asavanant, Kosuke Fukui +2
In continuous-variable quantum information processing, quantum error correction of Gaussian errors requires simultaneous estimation of both quadrature components of displacements o…