For the wake of the departed

Vladimir Ivanovich Inozemtsev 15.12.1950 – 25.03.2026

On 25 March, at the age of 76, Vladimir Ivanovich Inozemtsev, an outstanding Russian theoretical physicist, Doctor of Physical and Mathematical Sciences, a leading researcher in the Department of the Condensed Matter Theory of BLTP JINR, passed away. The labor activity of V. I. Inozemtsev was inextricably related to this Laboratory, in which he started working in 1974 after having graduated from the Physics Department of Moscow State University.

V. I. Inozemtsev is a world-famous scientist that worked in the field of statistical physics and of precisely solvable models of quantum mechanics. He obtained pioneering results in the theory of spin chains and multi-particle quantum systems.

In the theory of integrable systems, the precisely solvable models of Calogero and Sutherland are well known, the pair interactions of particles in which are described using rational and trigonometric functions. In 1989, V. I. Inozemtsev proposed a generalization of these systems to the case when the pair interaction is described using an elliptic function. Inozemtsev's integrable quantum model of non-relativistic particles is the most general known precisely solvable model and has many important applications in theoretical and mathematical physics.

In a famous 1990 article, V. I. Inozemtsev proposed a model of an integrable spin chain interpolating between a Heisenberg spin chain with local interaction and a Haldane-Shastri model with a long-range action. The corresponding exchange interaction has also been described using an elliptic function. This Inozemtsev model is the most general known integrable spin chain model. This result was awarded the first JINR Prize in the field of theoretical physics in 2003.

These and other outstanding results of V. I. Inozemtsev have obtained wide international recognition and are widely cited in the scientific literature. In 2023, a monograph “Integrable Many-Particle Systems” on his research was published. V. I. Inozemtsev more than once spoke at international conferences, was invited to cooperate in various countries. In particular, he had constant cooperation with Czech scientists.

In the person of V. I. Inozemtsev, BLTP JINR lost not only an outstanding scientist, but also a respected member of the staff with high human qualities and with a well-deserved authority. Friends and colleagues of Vladimir Ivanovich will forever keep a bright memory of him.

BLTP employees