10 papers
Permutationally Invariant Quantum State Tomography for Fermions
Shion Yamashika, Daisuke Yamamoto
Quantum state tomography provides complete information about a quantum state, but its measurement cost generally grows exponentially with system size. In many-particle quantum simu…
Simulating Quantum Field Theories with Boundaries in Curved Spacetimes Using Open Spin Systems
Shunichiro Kinoshita, Keiju Murata, Daisuke Yamamoto +1
We develop a framework to simulate quantum field theories (QFTs) with boundaries in -dimenmsional curved spacetimes by employing open spin systems. Building upon our previou…
Pressure-Tuned Metamagnetism and Emergent Three-Body Interactions in CsFeCl
K. Nihongi, T. Kida, Y. Narumi +11
We present a combined experimental and theoretical study of the triangular-lattice quantum antiferromagnet CsFeCl under high magnetic fields and high pressure. Pulsed-field mag…
A sine-square deformation approach to quantum critical points in one-dimensional systems
Yuki Miyazaki, Shiori Tanigawa, Giacomo Marmorini +2
We propose a method to determine the quantum phase boundaries of one-dimensional systems using sine-square deformation (SSD). Based on the proposition, supported by several exactly…
Crowdsourcing the Frontier: Advancing Hybrid Physics-ML Climate Simulation via a $50,000 Kaggle Competition
Jerry Lin, Zeyuan Hu, Tom Beucler +24
Subgrid machine-learning (ML) parameterizations have the potential to introduce a new generation of climate models that incorporate the effects of higher-resolution physics without…
Compressed sensing quantum state tomography for qudits: A comparison of Gell-Mann and Heisenberg-Weyl observable bases
Yoshiyuki Kakihara, Daisuke Yamamoto, Giacomo Marmorini
Quantum state tomography (QST) is an essential technique for reconstructing the density matrix of an unknown quantum state from measurement data, crucial for quantum information pr…
Melting of a Bosonic Mott Insulator in Kagome Optical Lattices with Sign-Inverted Hopping
Kazuma Nagao, Daisuke Yamamoto, Seiji Yunoki +1
Using the discrete truncated Wigner approximation (dTWA), we investigate the nonequilibrium dynamics of ultracold bosons confined in optical kagome lattices, focusing on both unfru…
Measuring entanglement without local addressing in quantum many-body simulators via spiral quantum state tomography
Giacomo Marmorini, Takeshi Fukuhara, Daisuke Yamamoto
Quantum state tomography serves as a key tool for identifying quantum states generated in quantum computers and simulators, typically involving local operations on individual parti…
Rényi entropy of the permutationally invariant part of the ground state across a quantum phase transition
Yuki Miyazaki, Giacomo Marmorini, Nobuo Furukawa +1
We investigate the role of the permutationally invariant part of the density matrix (PIDM) in capturing the properties of the ground state of the system during a quantum phase tran…
Dynamics of Interacting Bosons on the Sawtooth Lattice with a Flat Band
Ko Gondaira, Nobuo Furukawa, Daisuke Yamamoto
Quantum many-body systems are expected to relax to a thermal state over time, with some exceptions such as systems with atypical eigenstates. In this study, we investigate the effe…