  We study the ground state of two-component bosonic atoms in a one-dimensional
optical lattice. By applying an external field to the atoms at one end of
lattice, the atoms are transported and becomes localized at that site. The
holes are then created in the remaining sites. The particle-hole superpositions
are produced in this process. We investigate the entanglement entropy between
the atoms in the two different parts of a lattice. A large degree of
particle-hole entanglement is generated in the ground state. The particle-hole
quantum correlations can be probed by the two-site parity correlation
functions. The transport properties of the low-lying excited states are also
discussed.
