Bicausal optimal transport for SDEs with irregular coefficients
Abstract
We solve constrained optimal transport problems in which the marginal laws are given by the laws of solutions of stochastic differential equations (SDEs). We consider SDEs with irregular coefficients, making only minimal regularity assumptions. We show that the so-called synchronous coupling is optimal among bicausal couplings, that is couplings that respect the flow of information encoded in the stochastic processes. Our results provide a method to numerically compute the adapted Wasserstein distance between laws of SDEs with irregular coefficients. We show that this can be applied to quantifying model uncertainty in stochastic optimisation problems. Moreover, we introduce a transformation-based semi-implicit numerical scheme and establish the first strong convergence result for SDEs with exponentially growing and discontinuous drift.
Fields of Study & Subjects
Transportation Planning and Optimization
Traffic control and management
Diffusion and Search Dynamics
Publication details
- Journal / source
- Bernoulli
- Publisher
- Bernoulli Society for Mathematical Statistics and Probability
- Volume
- 32
- Issue
- 4
- Pages
- 3222–3248
- Publication date
- 31 July 2026
- Language
- EN