Work

Quantum field theory in flat spacetime with multiple time directions

Year: 2025

Type: article

Abstract: This work serves as the generalization of the work [1], where we investigated the quantum field theory in Klein space which has two time directions. We extend studies to the general spacetime R n , d − n ( n , d − n ≥ 2 ) in a similar manner; the “length of time” q is regarded as the evolution direction of the system and additional modes beyond the plane wave modes are introduced in the canonical quantization. We show that this novel formulation is consistent with the analytical continuation of the results in Minkowski spacetime.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/rq7p-lvq9

Authors: Bin Chen, Zezhou Hu, Xin-Cheng Mao

Institutions: Ningbo University, Peking University

Language: English

Topic: Relativity and Gravitational Theory

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: National Natural Science Foundation of China

Awards: G2898363512, G6550197239