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A Schrödinger random operator with semimartingale potential

  • Jonathan J. Gutierrez-Pavón EMAIL logo and Carlos G. Pacheco
Published/Copyright: June 1, 2023

Abstract

We study a Schrödinger random operator where the potential is in terms of a continuous semimartingale. Our model is a generalization of the well-known case where the potential is the white-noise. Our approach is to analyze the random operator by means of its bilinear form. This allows us to construct an inverse operator using an explicit Green kernel. To characterize such homogeneous solutions we use certain stochastic equations in terms of stochastic integrals with respect to the semimartingale. An important tool that we use is the multi-dimensional Itô formula. Also, one important corollary of our results is that the operator has a discrete spectrum.

MSC 2020: 60K37; 60H25

Communicated by Stanislav Molchanov


References

[1] W. Cheney, Analysis for Applied Mathematics, Grad. Texts in Math. 208, Springer, New York, 2001. 10.1007/978-1-4757-3559-8Search in Google Scholar

[2] M. Fukushima and S. Nakao, On spectra of the Schrödinger operator with a white Gaussian noise potential, Z. Wahrscheinlichkeitstheorie Verw. Gebiete 37 (1976/77), no. 3, 267–274. 10.1007/BF00537493Search in Google Scholar

[3] J. Gutierrez-Pavón and C. G. Pacheco, Inverting weak random operators, Random Oper. Stoch. Equ. 27 (2019), no. 1, 53–63. 10.1515/rose-2019-2003Search in Google Scholar

[4] J. Gutierrez-Pavón and C. G. Pacheco, Solving equations with semimartingale noise, Random Oper. Stoch. Equ. 30 (2022), no. 1, 33–38. 10.1515/rose-2021-2070Search in Google Scholar

[5] B. I. Halperin, Green’s functions for a particle in a one-dimensional random potential, Phys. Rev. (2) 139 (1965), A104–A117. 10.1103/PhysRev.139.A104Search in Google Scholar

[6] K. Kawazu and H. Tanaka, A diffusion process in a Brownian environment with drift, J. Math. Soc. Japan 49 (1997), no. 2, 189–211. 10.2969/jmsj/04920189Search in Google Scholar

[7] C. G. Pacheco, Green kernel for a random Schrödinger operator, Commun. Contemp. Math. 18 (2016), no. 5, Article ID 1550082. 10.1142/S0219199715500820Search in Google Scholar

[8] Z. Shi, A local time curiosity in random environment, Stochastic Process. Appl. 76 (1998), no. 2, 231–250. 10.1016/S0304-4149(98)00036-2Search in Google Scholar

[9] A. V. Skorohod, Random Linear Operators, Math. Appl. (Soviet Series), D. Reidel, Dordrecht, 1984. 10.1007/978-94-009-6063-3Search in Google Scholar

[10] M. Talet, Annealed tail estimates for a Brownian motion in a drifted Brownian potential, Ann. Probab. 35 (2007), no. 1, 32–67. 10.1214/009117906000000539Search in Google Scholar

Received: 2022-03-02
Accepted: 2022-08-26
Published Online: 2023-06-01
Published in Print: 2023-09-01

© 2023 Walter de Gruyter GmbH, Berlin/Boston

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