Chế độ gần như ổn định của một quá trình đi bộ phân nhánh trong sự xuất hiện của một bức tường hấp thụ

Journal of Statistical Physics - Tập 131 - Trang 203-233 - 2008
Damien Simon1, Bernard Derrida1
1Laboratoire de Physique Statistique, École Normale Supérieure, Paris Cedex 05, France

Tóm tắt

Một quá trình đi bộ phân nhánh khi có sự hiện diện của một bức tường hấp thụ chuyển động với vận tốc không đổi v trải qua một biến đổi pha khi vận tốc v của bức tường thay đổi. Dưới vận tốc giới hạn v_c, quần thể có xác suất sống sót khác không và khi quần thể sống sót, kích thước của nó tăng trưởng theo hàm mũ. Chúng tôi khảo sát lịch sử của quần thể với điều kiện có một người sống sót tại một thời điểm cuối cùng T. Chúng tôi nghiên cứu chế độ gần như ổn định cho v

Từ khóa

#đi bộ phân nhánh #bức tường hấp thụ #chế độ gần như ổn định #biến đổi pha #quần thể #quát trình ngẫu nhiên

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