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We propose a new class of ground states for doped Mott insulators in theelectron second-quantization representation. They are obtained from a bosonicresonating valence bond (RVB) theory of the t-J model. At half filling, theground state describes spin correlations of the S=1/2 Heisenberg model veryaccurately. Its spin degrees of freedom are characterized by RVB pairing ofspins, the size of which decreases continuously as holes are doped into thesystem. Charge degrees of freedom emerge upon doping and are described bytwisted holes in the RVB background. We show that the twisted holes exhibit anoff diagonal long range order (ODLRO) in the pseudogap ground state, which hasa finite pairing amplitude, but is short of phase coherence. Unpaired spins insuch a pseudogap ground state behave as free vortices, preventingsuperconducting phase coherence. The existence of nodal quasiparticles is alsoensured by such a hidden ODLRO in the ground state, which isnon-Fermi-liquid-like in the absence of superconducting phase coherence. Twodistinct types of spin excitations can also be constructed. The superconductinginstability of the pseudogap ground state is discussed and a d-wavesuperconducting ground state is obtained. This class of pseudogap andsuperconducting ground states unifies antiferromagnetism, pseudogap,superconductivity, and Mott physics into a new state of matter.Comment: 28 pages, 5 figures, final version to appear in Phys. Rev.

Bosonic resonating valence bond wave function for doped Mott insulators