**Svetlana Yakovlevna Jitomirskaya** (born June 4, 1966) is a Ukrainian mathematician working on dynamical systems and mathematical physics.

Jitomirskaya was born in Kharkiv, Ukraine. Both her mother, Valentina Borok, and her father Yakov Zhitomirskii were professors of mathematics.

Her undergraduate studies where at Moscow State University, where she was a student of, among others, Vladimir Arnold and Yakov Sinai. She obtained her Ph.D. from Moscow State University in 1991 under the supervision of Yakov Sinai. She joined the mathematics department at the University of California, Irvine in 1991 as a lecturer, and became an assistant professor there in 1994 and a full professor in 2000. She is best known for solving the ten martini problem along with mathematician Artur Avila.

In 2005, she was awarded the Ruth Lyttle Satter Prize in Mathematics, "for her pioneering work on non-perturbative quasiperiodic localization".

She was an invited speaker at the 2002 International Congress of Mathematicians, in Beijing.

She received a Sloan Fellowship in 1996.

Jitomirskaya, Svetlana Ya. (1999), "Metal-insulator transition for the almost Mathieu operator", *Annals of Mathematics*, Second Series, **150** (3): 1159–1175, MR 1740982, doi:10.2307/121066 .
Avila, Artur; Jitomirskaya, Svetlana (2009), "The Ten Martini Problem", *Annals of Mathematics*, Second Series, **170** (1): 303–342, MR 2521117, doi:10.4007/annals.2009.170.303 .
Jitomirskaya, Svetlana; Last, Yoram (1999), "Power-law subordinacy and singular spectra. I. Half-line operators", *Acta Mathematica*, **183** (2): 171–189, MR 1738043, doi:10.1007/BF02392827 .