Relativistic quantum geometry from a 5D geometrical vacuum: Gravitational waves from preinflation
Sign Up to like & getrecommendations! Published in 2019 at "Physics of the Dark Universe"
DOI: 10.1016/j.dark.2019.100309
Abstract: In this work we introduce Relativistic Quantum Geometry (RQG) on a Modern Kaluza-Klein theory by studying the boundary conditions on a extended Einstein-Hilbert action for a 5D vacuum defined on a 5D (background) Riemannian manifold.… read more here.
Keywords: gravitational waves; vacuum; geometry; relativistic quantum ... See more keywords
Electric-Field Tunable THz Emission via Quantum Geometry in Dirac Semimetal.
Sign Up to like & getrecommendations! Published in 2025 at "Nano letters"
DOI: 10.1021/acs.nanolett.5c01363
Abstract: Electric-field manipulation of spin degrees of freedom is pivotal for next-generation spintronics, yet nonvolatile control at terahertz (THz) frequencies remains elusive. Here, we harness the quantum geometry of a Dirac semimetal, PtTe2, to achieve all-electrical… read more here.
Keywords: field; geometry dirac; electric field; geometry ... See more keywords
Quantum Geometry and the Electric Magnetochiral Anisotropy in Noncentrosymmetric Polar Media.
Sign Up to like & getrecommendations! Published in 2025 at "Physical review letters"
DOI: 10.1103/7nxc-j62y
Abstract: The electric magnetochiral anisotropy is a nonreciprocal phenomenon accessible via second harmonic transport in noncentrosymmetric, time-reversal invariant materials, in which the rectification of current, I, can be controlled by an external magnetic field, B. Quantum… read more here.
Keywords: electric magnetochiral; magnetochiral anisotropy; geometry; quantum geometry ... See more keywords
Normal-state quantum geometry, nonlocality, and superconductivity
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review B"
DOI: 10.1103/kzj9-99j1
Abstract: We investigate aspects of the relation between the quantum geometry of the normal state (NS) and the superconducting phase, through the lens of non-locality. By relating band theory to quantum estimation theory, we derive a… read more here.
Keywords: quantum geometry; normal state; superconductivity; geometry ... See more keywords
Quantum geometry and geometric entanglement entropy of one-dimensional Floquet topological matter
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review B"
DOI: 10.1103/physrevb.110.054310
Abstract: The geometry of quantum states could offer indispensable insights for characterizing the topological properties, phase transitions and entanglement nature of many-body systems. In this work, we reveal the quantum geometry and the associated entanglement entropy… read more here.
Keywords: quantum geometry; floquet topological; geometry; entanglement entropy ... See more keywords
Altermagnetic instabilities from quantum geometry
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review B"
DOI: 10.1103/physrevb.111.174407
Abstract: Altermagnets are a newly identified type of collinear antiferromagnetism with vanishing net magnetic moment, characterized by lifted Kramers' degeneracy in parts of the Brillouin zone. Their time-reversal symmetry-broken band structure has been observed experimentally and… read more here.
Keywords: geometry altermagnetic; altermagnetic instabilities; quantum metric; geometry ... See more keywords
Nonadiabatic quantum geometry and optical conductivity
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review B"
DOI: 10.1103/physrevb.111.205107
Abstract: The ground-state quantum geometry is at the root of several static and adiabatic properties, while genuinely dynamic properties are routinely addressed via Kubo formulae, whose essential entries are the excited states. It is shown here… read more here.
Keywords: geometry optical; conductivity; geometry; quantum geometry ... See more keywords
Thermal and thermoelectric transport in flat bands with nontrivial quantum geometry
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review B"
DOI: 10.1103/physrevb.111.205140
Abstract: Although quasiparticles in flat bands have zero group velocity, they can display an anomalous velocity due to the quantum geometry. We address the thermal and thermoelectric transport in flat bands in the clean limit with… read more here.
Keywords: thermal thermoelectric; geometry; quantum geometry; flat bands ... See more keywords
Symmetry, spin-texture, and tunable quantum geometry in a WTe2 monolayer
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.99.035403
Abstract: The spin orientation of electronic wavefunctions in crystals is an internal degree of freedom, typically insensitive to electrical knobs. We argue from a general symmetry analysis and a $\vec k \cdot \vec p$ perspective, that… read more here.
Keywords: spin texture; geometry; spin; quantum geometry ... See more keywords
Corner Charge Fluctuation as an Observable for Quantum Geometry and Entanglement in Two-Dimensional Insulators.
Sign Up to like & getrecommendations! Published in 2024 at "Physical review letters"
DOI: 10.1103/physrevlett.133.246603
Abstract: Measuring bipartite fluctuations of a conserved charge, such as the particle number, is a powerful approach to understanding quantum systems. When the measured region has sharp corners, the bipartite fluctuation receives an additional contribution known… read more here.
Keywords: corner charge; geometry; quantum geometry; charge fluctuation ... See more keywords