Vấn đề bậc hai đối với lý thuyết trường Lagrangian k-presymplectic: ứng dụng cho mô hình Einstein–Palatini

David Adame-Carrillo1, Jordi Gaset2, Narciso Román‐Roy3
1Department of Mathematics and Systems Analysis, Aalto University, Espoo, Finland
2Department of Physics, Universitat Autònoma de Barcelona, Bellaterra, Spain
3Department of Mathematics, Universitat Politècnica de Catalunya, Barcelona, Spain

Tóm tắt

Tóm tắtNói chung, hệ thống các phương trình vi phân riêng bậc hai được tạo thành từ các phương trình Euler–Lagrange của lý thuyết trường cổ điển không tương thích đối với các Lagrangian kỳ dị. Đây được gọi là vấn đề bậc hai. Mục tiêu đầu tiên của công trình này là phát triển một thuật toán ràng buộc hình học hoàn chỉnh cho phép chúng tôi tìm một tiểu đa tạp nơi các phương trình Euler–Lagrange có nghiệm, và phân tách các ràng buộc thành hai loại tùy thuộc vào nguồn gốc của chúng. Chúng tôi thực hiện điều này bằng cách sử dụng hình học k-symplectic, mô tả nội tại đơn giản nhất của lý thuyết trường cổ điển. Mục tiêu thứ hai, mô hình Einstein–Palatini của thuyết Tương đối Tổng quát được nghiên cứu thông qua thuật toán này.

Từ khóa


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