Fluctuation-induced Hall-like lateral forces in a chiral-gain environment
- URL: http://arxiv.org/abs/2507.14754v2
- Date: Mon, 28 Jul 2025 00:48:48 GMT
- Title: Fluctuation-induced Hall-like lateral forces in a chiral-gain environment
- Authors: Daigo Oue, Mário G. Silveirinha,
- Abstract summary: We demonstrate that vacuum fluctuations can induce lateral forces on a small particle positioned near a translation-invariant uniform non-Hermitian substrate with chiral gain.<n>This type of non-Hermitian response can be engineered by biasing a low-symmetry conductor with a static electric field.<n>Our theory reveals a Hall-like asymmetry in the field correlations and establishes a novel link between quantum geometry and fluctuation-induced phenomena.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Here, we demonstrate that vacuum fluctuations can induce lateral forces on a small particle positioned near a translation-invariant uniform non-Hermitian substrate with chiral gain. This type of non-Hermitian response can be engineered by biasing a low-symmetry conductor with a static electric field and is rooted in the quantum geometry of the material through the Berry curvature dipole. The chiral-gain material acts as an active medium for a particular circular polarisation handedness, while serving as a passive, dissipative medium for the other polarisation handedness. Owing to the nonreciprocity and gain characteristics, momentum is continuously exchanged in a preferred direction parallel to the surface between the test particle and the surrounding electromagnetic field, giving rise to lateral forces. Interestingly, the force can be viewed as a fluctuation-induced drag linked to the nonlinear Hall current. Indeed, although the gain is driven by an electric current, the resulting force acts perpendicular to the bias -- unlike conventional current-drag effects. This effect stems from the skewed propagation characteristics of surface modes and gain-momentum locking. Our theory reveals a Hall-like asymmetry in the field correlations and establishes a novel link between quantum geometry and fluctuation-induced phenomena, offering new possibilities for nanoscale control via tailored electromagnetic environments.
Related papers
- Spin orientation by electric current in altermagnets [0.0]
flow of electric current in an altermagnet results in the formation of a homogeneous electron spin orientation in the sample.<n>Spin of conduction electrons generated in altermagnets with $d$-wave spin-momentum couplings, is quadratic in the current magnitude.
arXiv Detail & Related papers (2025-03-15T16:48:01Z) - Thermal Radiation Force and Torque on Moving Nanostructures with Anisotropic Optical Response [49.1574468325115]
We show that moving nanostructures with an anisotropic optical response experience a lateral force and a torque that substantially modify their trajectory.<n>These phenomena emerge from the additional coupling between the electromagnetic field components polarized parallel and perpendicular to the trajectory.
arXiv Detail & Related papers (2025-01-29T17:31:44Z) - Quantum optical scattering by macroscopic lossy objects: A general approach [55.2480439325792]
We develop a general approach to describe the scattering of quantum light by a lossy macroscopic object placed in vacuum.<n>We exploit the input-output relation to connect the output state of the field to the input one.<n>We analyze the impact of the classical transmission and absorption dyadics on the transitions from ingoing to outgoing s-polariton.
arXiv Detail & Related papers (2024-11-27T17:44:29Z) - Quantum Torque on a Non-Reciprocal Body out of Thermal Equilibrium and
Induced by a Magnetic Field of Arbitrary Strength [0.0]
A stationary body out of thermal equilibrium with its environment experiences a quantum torque.
This arises from the spatially non-symmetric electrical response of the body to its interaction with the non-equilibrium thermal fluctuations of the electromagnetic field.
arXiv Detail & Related papers (2023-09-25T14:51:08Z) - Magnetic-field-induced cavity protection for intersubband polaritons [52.77024349608834]
We analyse the effect of a strong perpendicular magnetic field on an intersubband transition in a disordered doped quantum well strongly coupled to an optical cavity.
The magnetic field changes the lineshape of the intersubband optical transition due to the roughness of the interface of the quantum well from a Lorentzian to a Gaussian one.
arXiv Detail & Related papers (2022-10-14T18:00:03Z) - Effective quantum dynamics in curved thin-layer system with
inhomogeneous confinement [0.0]
The motion of quantum particles homogeneously constrained to a curved surface is affected by a curvature induced geometric potential.
This study develops the method for low-dimensional constrained systems and exhibits the possibility of new degree of control for waveguiding in nanostructures.
arXiv Detail & Related papers (2022-08-14T09:23:38Z) - A background-free optically levitated charge sensor [50.591267188664666]
We introduce a new technique to model and eliminate dipole moment interactions limiting the performance of sensors employing levitated objects.
As a demonstration, this is applied to the search for unknown charges of a magnitude much below that of an electron.
As a by-product of the technique, the electromagnetic properties of the levitated objects can also be measured on an individual basis.
arXiv Detail & Related papers (2021-12-20T08:16:28Z) - Nonequilibrium Casimir effects of nonreciprocal surface waves [52.12351460454646]
We show that an isotropic dipolar particle in the vicinity of a substrate made of nonreciprocal plasmonic materials can experience a lateral Casimir force and torque.
We connect the existence of the lateral force to the asymmetric dispersion of nonreciprocal surface polaritons and the existence of the lateral torque to the spin-momentum locking of such surface waves.
arXiv Detail & Related papers (2021-06-19T23:10:04Z) - Molecular Interactions Induced by a Static Electric Field in Quantum
Mechanics and Quantum Electrodynamics [68.98428372162448]
We study the interaction between two neutral atoms or molecules subject to a uniform static electric field.
Our focus is to understand the interplay between leading contributions to field-induced electrostatics/polarization and dispersion interactions.
arXiv Detail & Related papers (2021-03-30T14:45:30Z) - Open Quantum-System Simulation of Faraday's Induction Law via Dynamical
Instabilities [0.0]
We propose a novel type of a Bose-Hubbard ladder model to study the physics of dynamical gauge potentials.
A steady-state atomic motion along the legs of the ladder leads either to a pure chiral current, or generates simultaneously chiral and particle currents.
An electromotive force is induced in this dynamical regime as expected from an interpretation based on Faraday's law of induction for the time-dependent synthetic magnetic flux.
arXiv Detail & Related papers (2021-03-02T19:01:02Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.