Abstract
Using the approach of D. Landriault et al. and B. Li and X. Zhou, for a one-dimensional time-homogeneous diffusion process X and constants c < a < b < d, we find expressions of double Laplace transforms of the form \(\mathbb{E}_x [e^{ - \theta T_d - \lambda } \int_0^{T_d } {1_{a < X_s < b} ds} ;T_d < T_c ]\), where T x denotes the first passage time of level x. As applications, we find explicit Laplace transforms of the corresponding occupation time and occupation density for the Brownian motion with two-valued drift and that of occupation time for the skew Ornstein-Uhlenbeck process, respectively. Some known results are also recovered.
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Li, Y., Wang, S., Zhou, X. et al. Diffusion occupation time before exiting. Front. Math. China 9, 843–861 (2014). https://doi.org/10.1007/s11464-014-0402-6
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DOI: https://doi.org/10.1007/s11464-014-0402-6
Keywords
- Diffusion
- exit problem
- occupation time
- occupation density
- local time
- Brownian motion with two-valued drift
- skew Ornstein-Uhlenbeck (OU) process