Abstract
In a different paper we constructed imaginary time Schrödinger operatorsH q=−1/2Δ+V acting onL q(ℝn,dx). The negative part of typical potential functionV was assumed to be inL ∞+L q for somep>max{1,n/2}. Our proofs were based on the evaluation of Kac's averages over Brownian motion paths. The present paper continues this study: using probabilistic techniques we prove pointwise upper bounds forL q-Schrödinger eigenstates and pointwise lower bounds for the corresponding groundstate. The potential functionsV are assumed to be neither smooth nor bounded below. Consequently, our results generalize Schnol's and Simon's ones. Moreover probabilistic proofs seem to be shorter and more informative than existing ones.
Similar content being viewed by others
References
Babbit, D.W.: The Wiener integral and perturbation theory of the Schrödinger operator. Bull. Am. Math. Soc.70, 254–259 (1964)
Berthier, A.M., Gaveau, B.: Critère de convergence des fonctionnelles de Kac et application en mécanique quantique et en géométrie. J. Funct. Anal. (to appear)
Carmona, R.: Potentials on abstract Wiener space. J. Funct. Anal.26, 215–231 (1977)
Carmona, R.: Regularity properties of Schrödinger and Dirichlet semigroups. J. Funct. Anal. (to appear)
Deift, P., Simon, B.: On the decoupling of finite singularities from the question of asymptotic completeness in two-body quantum systems. J. Funct. Anal.23, 218–238 (1976)
Eckmann, J.P.: Hypercontractivity for anharmonic oscillators. J. Funct. Anal.16, 388–404 (1974)
Ezawa, H., Klauder, J.R., Shepp, L.A.: A path space picture for Feynman-Kac averages. Ann. Phys.88, 588–620 (1974)
Ezawa, H., Klauder, J.R., Shepp, L.A.: Vestigial effects of singular potentials in diffusion theory and quantum mechanics. J. Math. Phys.16, 783–799 (1975)
Faris, W.G., Simon, B.: Degenerate and non degenerate ground states for Schrödinger operators. Duke Math. J.42, 559–567 (1975)
Feldman, J.: On the Schrödinger and heat equations for non negative potentials. Trans. Am. Math. Soc.108, 251–264 (1963)
Ginibre, J.: Some applications of functional integration in statistical mechanics. In: Statistical mechanics and quantum field theory (eds. C. DeWitt, R. Stora) pp. 327–427. New York: Gordon and Breach 1970
Gross, L.: Logarithmic Sobolev inequalities. Am. J. Math.97, 1061–1083 (1976)
Ito, K., McKean, H.P.: Diffusion processes and their sample paths, 2nd printing. Berlin-Heidelberg-New York: Springer 1974
Kac, M.: On some connection between probability theory and differential and integral equations. Proc. 2nd Berk. Symp. on Math. Stat. and Prob. pp. 199–215 (1951)
Lieb, E.: Bounds on the eigenvalues of the Laplace and Schrödinger operators Bull. Am. Math. Soc.82, 751–753 (1976)
McKean, H.P.: — Δ plus a bad potential. J. Math. Phys.18, 1277–1279 (1977)
Parthasarathy, K.R.: Probability measures on metric spaces. New York: Academic Press 1967
Ray, D.: On the spectra of second order differential operators. Trans. Am. Math. Soc.77, 299–321 (1954)
Rosen, J.S.: Sobolev inequalities for weight spaces and supercontractivity. Trans. Am. Math. Soc.222, 367–376 (1976)
Simon, B.: Pointwise bounds on eigenfunctions and wave packets inN-body quantum systems. II. Proc. Am. Math. Soc.45, 454–456 (1974)
Simon, B.: Pointwise bounds on eigenfunctions and wave packets inN-body quantum systems. III. Trans. Am. Math. Soc.208, 317–329 (1975)
Simon, B.: Functional integration and quantum physics. New York: Academic press (to appear)
Šnol', J.E.: On the behavior of the eigenfunctions of Schrödinger's equation Mat. Sb.46, 273–286 (1957); Erratum 259 (Russian)
Author information
Authors and Affiliations
Additional information
Communicated by J. Glimm
Laboratoire de Mathématiques de Marseille associé au C.N.R.S. L.A.225
Rights and permissions
About this article
Cite this article
Carmona, R. Pointwise bounds for Schrödinger eigenstates. Commun. Math. Phys. 62, 97–106 (1978). https://doi.org/10.1007/BF01248665
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01248665