Heterotic String
Heterotic String is a scholarly work by David Gross, published in 1985 in ''Physical Review Letters''. The main subjects of the publication include supersymmetry, theoretical physics, physics, tachyon, mathematical physics, superstring theory, particle physics, holographic principle, heterotic string theory, quantum gravity, and invariant. A new type of superstring theory is constructed as a chiral combination of the closed $D=26$ bosonic and $D=10$ fermionic strings.