505 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- RIKEN Center for Advanced PhotonicsJP177 papers
- Computing CenterRU106 papers
- The University of TokyoJP97 papers
- RIKENJP79 papers
- RIKEN Center for Emergent Matter ScienceJP57 papers
- University of MichiganUS51 papers
- RIKEN Center for Computational ScienceJP45 papers
- The University of OsakaJP38 papers
- Pioneer (Japan)JP29 papers
- Japan Science and Technology AgencyJP26 papers
- Tokyo University of ScienceJP24 papers
- Kyoto UniversityJP14 papers
43 papers · 2 filters
Non-Gaussian state generation with time-gated photon detection
Tatsuki Sonoyama, Kazuma Takahashi, Baramee Charoensombutamon +9
Non-Gaussian states of light, which are essential in fault-tolerant and universal optical quantum computation, are typically generated by a heralding scheme using photon detectors.…
Minimum Trotterization Formulas for a Time-Dependent Hamiltonian
Tatsuhiko N. Ikeda, Asir Abrar, Isaac L. Chuang +1
When a time propagator for duration consists of two noncommuting parts , Trotterization approximately decomposes the propagator into a product of exponential…
All-optical quantum computing using cubic phase gates
Niklas Budinger, Akira Furusawa, Peter van Loock
If suitable quantum optical interactions were available, transforming optical field mode operators in a nonlinear fashion, the all-photonics platform could be one of the strongest…
Generation of spin squeezing via a fully quantum degenerate parametric amplifier
Yang Liu, Jie Song, Wei Qin +2
Spin squeezing is one of the most attractive methods for realizing high-precision metrology. In this paper, we propose a protocol for generating spin squeezing in an atomic ensembl…
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…
Noise properties of a Josephson parametric oscillator
Gopika Lakshmi Bhai, Hiroto Mukai, Tsuyoshi Yamamoto +1
We perform the noise spectroscopy of a Josephson parametric oscillator (JPO) by implementing a microwave homodyne interferometric measurement scheme. We observe the fluctuations in…
Parametrized quantum circuit for weight-adjustable quantum loop gas
Rong-Yang Sun, Tomonori Shirakawa, Seiji Yunoki
Motivated by the recent success of realizing the topologically ordered ground state of the exactly solvable toric code model by a quantum circuit on the real quantum device [K. J.…
Millionfold improvement in multivibration-feedback optomechanical refrigeration via auxiliary mechanical coupling
Rui Xu, Deng-Gao Lai, Bang-Pin Hou +2
The simultaneous ground-state refrigeration of multiple vibrational modes is a prerequisite for observing significant quantum effects of multiple-vibration systems. Here we propose…
Quantum state discrimination in a PT-symmetric system
Dong-Xu Chen, Yu Zhang, Jun-Long Zhao +4
Nonorthogonal quantum state discrimination (QSD) plays an important role in quantum information and quantum communication. In addition, compared to Hermitian quantum systems, parit…
Postselected quantum hypothesis testing
Bartosz Regula, Ludovico Lami, Mark M. Wilde
We study a variant of quantum hypothesis testing wherein an additional 'inconclusive' measurement outcome is added, allowing one to abstain from attempting to discriminate the hypo…
Probing the symmetry breaking of a light--matter system by an ancillary qubit
Shuai-Peng Wang, Alessandro Ridolfo, Tiefu Li +4
Hybrid quantum systems in the ultrastrong, and even more in the deep-strong, coupling regimes can exhibit exotic physical phenomena and promise new applications in quantum technolo…
Optimal Hamiltonian simulation for time-periodic systems
Kaoru Mizuta, Keisuke Fujii
The implementation of time-evolution operators , called Hamiltonian simulation, is one of the most promising usage of quantum computers. For time-independent Hamiltonians, qu…
Noise-correlation spectrum for a pair of spin qubits in silicon
J. Yoneda, J. S. Rojas-Arias, P. Stano +5
Semiconductor qubits are appealing for building quantum processors as they may be densely integrated due to small footprint. However, a high density raises the issue of noise corre…
Space-time dual quantum Zeno effect: Interferometric engineering of open quantum system dynamics
Jhen-Dong Lin, Ching-Yu Huang, Neill Lambert +3
Superposition of trajectories, which modify quantum evolutions by superposing paths through interferometry, has been utilized to enhance various quantum communication tasks. Howeve…
Entanglement Dynamics in Anti--Symmetric Systems
Yu-Liang Fang, Jun-Long Zhao, Dong-Xu Chen +5
In the past years, many efforts have been made to study various noteworthy phenomena in both parity-time () and anti-parity-time () symmetric systems.…
Flow of quantum correlations in noisy two-mode squeezed microwave states
M. Renger, S. Pogorzalek, F. Fesquet +10
We study nonclassical correlations in propagating two-mode squeezed microwave states in the presence of noise. We focus on two different types of correlations, namely, quantum enta…
Observation of a superradiant phase transition with emergent cat states
Ri-Hua Zheng, Wen Ning, Ye-Hong Chen +15
Superradiant phase transitions (SPTs) are important for understanding light-matter interactions at the quantum level, and play a central role in criticality-enhanced quantum sensin…
Energy-filtered random-phase states as microcanonical thermal pure quantum states
Kazuhiro Seki, Seiji Yunoki
We propose a method to calculate finite-temperature properties of a quantum many-body system for a microcanonical ensemble by introducing a pure quantum state named here an energy-…
Fast Classical Simulation of Hamiltonian Dynamics by Simultaneous Diagonalization Using Clifford Transformation with Parallel Computation
Yoshiaki Kawase, Keisuke Fujii
Simulating quantum many-body dynamics is important both for fundamental understanding of physics and practical applications for quantum information processing. Therefore, classical…
Creating and controlling exceptional points of non-Hermitian Hamiltonians via homodyne Lindbladian invariance
Fabrizio Minganti, Dolf Huybrechts, Cyril Elouard +2
The Exceptional Points (EPs) of non-Hermitian Hamiltonians (NHHs) are spectral degeneracies associated with coalescing eigenvalues and eigenvectors which are associated with remark…
Effective light cone and digital quantum simulation of interacting bosons
Tomotaka Kuwahara, Tan Van Vu, Keiji Saito
The speed limit of information propagation is one of the most fundamental features in non-equilibrium physics. The region of information propagation by finite-time dynamics is appr…
43-GHz bandwidth real-time amplitude measurement of 5-dB squeezed light using modularized optical parametric amplifier with 5G technology
Asuka Inoue, Takahiro Kashiwazaki, Taichi Yamashima +7
Continuous-variable optical quantum information processing (CVOQIP), where quantum information is encoded in a traveling wave of light called a flying qubit, is a candidate for a p…
Quantum arbitrary waveform generator
Kan Takase, Akito Kawasaki, Byung Kyu Jeong +13
Controlling the waveform of light is the key for a versatile light source in classical and quantum electronics. Although pulse shaping of classical light is a mature technique and…
Ultrastrong waveguide QED with giant atoms
Sergi Terradas-Briansó, Carlos A. González-Gutiérrez, Franco Nori +2
Quantum optics with giant emitters has shown a new route for the observation and manipulation of non-Markovian properties in waveguide-QED. In this paper we extend the theory of gi…