Zonal flows and reversals of cortically confined active suspensions

Kavli Affiliate: L. Mahadevan | First 5 Authors: J. S. Yodh, F. Giardina, S. Gokhale, L. Mahadevan, | Summary: At sufficiently high concentrations, motile bacteria suspended in fluids exhibit a range of ordered and disordered collective motions. Here we explore the combined effects of confinement, periodicity and curvature induced by the active motion of E. […]


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Phonon-driven femtosecond dynamics of excitons in crystalline pentacene from first principles

Kavli Affiliate: Jeffrey B. Neaton | First 5 Authors: Galit Cohen, Jonah B. Haber, Jeffrey B. Neaton, Diana Y. Qiu, Sivan Refaely-Abramson | Summary: Non-radiative exciton relaxation processes are critical for energy transduction efficiencies in optoelectronic materials, but how these processes are connected to the underlying crystal structure and its associated electron, exciton, and phonon […]


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Enhanced sensitivity via non-Hermitian topology

Kavli Affiliate: Alireza Marandi | First 5 Authors: Midya Parto, Christian Leefmans, James Williams, Alireza Marandi, | Summary: Sensors are indispensable tools of modern life that are ubiquitously used in diverse settings ranging from smartphones and autonomous vehicles to the healthcare industry and space technology. By interfacing multiple sensors that collectively interact with the signal […]


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Engineering cubic quantum nondemolition Hamiltonian with mesoscopic optical parametric interactions

Kavli Affiliate: Alireza Marandi | First 5 Authors: Ryotatsu Yanagimoto, Rajveer Nehra, Edwin Ng, Alireza Marandi, Hideo Mabuchi | Summary: We propose a scheme to realize cubic quantum nondemolition (QND) Hamiltonian with optical parametric interactions. We show that strongly squeezed fundamental and second harmonic fields propagating in a $chi^{(2)}$ nonlinear medium effectively evolve under a […]


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Surface oxides, carbides, and impurities on RF superconducting Nb and Nb3Sn: A comprehensive analysis

Kavli Affiliate: David A. Muller | First 5 Authors: Zeming Sun, Zhaslan Baraissov, Catherine A. Dukes, Darrah K. Dare, Thomas Oseroff | Summary: Surface structures on radio-frequency (RF) superconductors are crucially important in determining their interaction with the RF field. Here we investigate the surface compositions, structural profiles, and valence distributions of oxides, carbides, and […]


Continue.. Surface oxides, carbides, and impurities on RF superconducting Nb and Nb3Sn: A comprehensive analysis

Emergent U(1) symmetry in non-particle-conserving one-dimensional models

Kavli Affiliate: Natalia Chepiga | First 5 Authors: Zakaria Jouini, Natalia Chepiga, Loic Herviou, Frédéric Mila, | Summary: The properties of stable Luttinger liquid phases in models with a non-conserved number of particles are investigated. We study the Luttinger liquid phases in one-dimensional models of hard-core boson and spinless fermion chains where particles can be […]


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Cross-view Action Recognition via Contrastive View-invariant Representation

Kavli Affiliate: Dan Luo | First 5 Authors: Yuexi Zhang, Dan Luo, Balaji Sundareshan, Octavia Camps, Mario Sznaier | Summary: Cross view action recognition (CVAR) seeks to recognize a human action when observed from a previously unseen viewpoint. This is a challenging problem since the appearance of an action changes significantly with the viewpoint. Applications […]


Continue.. Cross-view Action Recognition via Contrastive View-invariant Representation

Cross-view Action Recognition via Contrastive View-invariant Representation

Kavli Affiliate: Dan Luo | First 5 Authors: Yuexi Zhang, Dan Luo, Balaji Sundareshan, Octavia Camps, Mario Sznaier | Summary: Cross view action recognition (CVAR) seeks to recognize a human action when observed from a previously unseen viewpoint. This is a challenging problem since the appearance of an action changes significantly with the viewpoint. Applications […]


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Correlated Terahertz phonon-ion interactions dominate ion conduction in solid electrolyte Li0.5La0.5TiO3

Kavli Affiliate: Scott K. Cushing | First 5 Authors: Kim H. Pham, Kiarash Gordiz, Jonathan M. Michelsen, Hanzhe Liu, Daniele Vivona | Summary: Ionic conduction in solids that exceeds 0.01 S/cm is predicted to involve collective phonon-ion interactions in the crystal lattice. Here, we use theory and experiment to measure the contribution of possible collective […]


Continue.. Correlated Terahertz phonon-ion interactions dominate ion conduction in solid electrolyte Li0.5La0.5TiO3

Correlated Terahertz phonon-ion interactions control ion conduction in a solid electrolyte

Kavli Affiliate: Scott K. Cushing | First 5 Authors: Kim H. Pham, Kiarash Gordiz, Natan A. Spear, Amy K. Lin, Jax Dallas | Summary: Ionic conduction in solids that exceeds 1 mS/cm is predicted to involve collective phonon-ion interactions in the crystal lattice. Here, we use theory and experiment to measure the possible contribution of […]


Continue.. Correlated Terahertz phonon-ion interactions control ion conduction in a solid electrolyte