Theoretical Physics – Page 14 – Kavli Institute Pre-Print Publications

Thermomagnetic anomalies in quantum magnon transport caused by tunable junction geometries in cold atomic systems

Posted by dbos December 13, 2024UCAS

Kavli Affiliate: Mamoru Matsuo | First 5 Authors: Yuta Sekino, Yuya Ominato, Hiroyuki Tajima, Shun Uchino, Mamoru Matsuo | Summary: We study magnon-driven spin and heat transport in a magnetic linear junction (MLJ) formed by two ferromagnets in optical lattices linked via linearly aligned bonds. Using the Schwinger-Keldysh formalism, we uncover that under weak effective […]

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GenEx: Generating an Explorable World

Posted by dbos December 12, 2024UCAS

Kavli Affiliate: Cheng Peng | First 5 Authors: Taiming Lu, Tianmin Shu, Junfei Xiao, Luoxin Ye, Jiahao Wang | Summary: Understanding, navigating, and exploring the 3D physical real world has long been a central challenge in the development of artificial intelligence. In this work, we take a step toward this goal by introducing GenEx, a […]

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Dissipative Dynamical Phase Transition as a Complex Ising Model

Posted by dbos December 12, 2024UCSB

Kavli Affiliate: Matthew P. A. Fisher | First 5 Authors: Stephen W. Yan, Diego Barberena, Matthew P. A. Fisher, Sagar Vijay, | Summary: We investigate a quantum dynamical phase transition induced by the competition between local unitary evolution and dissipation in a qubit chain with a strong, on-site $mathbb{Z}_2$ symmetry. While the steady-state of this […]

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A photonic integrated circuit for heterogeneous second harmonic generation

Posted by dbos December 12, 2024January 13, 2025UCSB

Kavli Affiliate: John E. Bowers | First 5 Authors: Theodore J. Morin, Mingxiao Li, Federico Camponeschi, Hou Xiong, Deven Tseng | Summary: Heterogeneous integration of GaAs-based lasers with frequency doubling waveguides presents a clear path to scalable coherent sources in the so-called green gap, yet frequency doubling systems have so far relied on separately manufactured […]

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EvTTC: An Event Camera Dataset for Time-to-Collision Estimation

Posted by dbos December 6, 2024January 6, 2025UCAS

Kavli Affiliate: Yi Zhou | First 5 Authors: Kaizhen Sun, Jinghang Li, Kuan Dai, Bangyan Liao, Wei Xiong | Summary: Time-to-Collision (TTC) estimation lies in the core of the forward collision warning (FCW) functionality, which is key to all Automatic Emergency Braking (AEB) systems. Although the success of solutions using frame-based cameras (e.g., Mobileye’s solutions) […]

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EvTTC: An Event Camera Dataset for Time-to-Collision Estimation

Posted by dbos December 6, 2024UCAS

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A solvable model for strongly interacting nonequilibrium excitons

Posted by dbos December 4, 2024January 6, 2025UCSB

Kavli Affiliate: Leon Balents | First 5 Authors: Zhenhao Song, Tessa Cookmeyer, Leon Balents, , | Summary: We study the driven-dissipative Bose-Hubbard model with all-to-all hopping and subject to incoherent pumping and decay, as is naturally probed in several recent experiments on excitons in WS2/WSe2 moir’e systems, as well as quantum simulators. By positing a […]

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Successive magnetic transitions in the spin-5/2 easy-axis triangular-lattice antiferromagnet Na$_2$BaMn(PO$_4$)$_2$: A neutron diffraction study

Posted by dbos December 4, 2024January 6, 2025UCAS

Kavli Affiliate: Gang Su | First 5 Authors: Chuandi Zhang, Junsen Xiang, Cheng Su, Denis Sheptyakov, Xinyang Liu | Summary: Motivated by the recent observations of various exotic quantum states in the equilateral triangular-lattice phosphates Na$_2$BaCo(PO$_4$)$_2$ with $Jrm_{eff}$ = 1/2 and Na$_2$BaNi(PO$_4$)$_2$ with $S$ = 1, the magnetic properties of spin-5/2 antiferromagnet Na$_2$BaMn(PO$_4$)$_2$, their classical […]

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Fractionalized Kohn-Sham ansatz for strongly-correlated electrons

Posted by dbos December 2, 2024UCAS

Kavli Affiliate: Zheng Zhu | First 5 Authors: Bo Zhao, Jingyu Zhao, Zheng Zhu, Jian Wu, Zheng Liu | Summary: We propose to expand the territory of density functional theory to strongly-correlated electrons by reformulating the Kohn-Sham ansatz in the representation of fractionalized particles. We call it the ”KS* ansatz”. Using inhomogeneous t-J chains as […]

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Fractionalized Kohn-Sham Scheme for Strongly Correlated Electrons

Posted by dbos December 2, 2024UCAS

Kavli Affiliate: Zheng Zhu | First 5 Authors: Bo Zhao, Jingyu Zhao, Zheng Zhu, Jian Wu, Zheng Liu | Summary: We propose to expand the territory of density functional theory to strongly correlated electrons by reformulating the Kohn-Sham scheme in the representation of fractionalized particles. We call it the “KS* scheme.” Using inhomogeneous $t$-$J$ chains […]

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