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The many-body correlation effects in the spatially separated electron andhole layers in the coupled quantum wells are investigated. The specific case ofthe many-component electron-hole system is considered. Keeping the maindiagrams in the parameter of the inverse number of components allows us tojustify the RPA diagram selection. The ground state of the system is found tobe the electron-hole liquid which possesses the energy smaller than the excitonphase. The connection is discussed between the results obtained and theexperiments in which the inhomogeneous state in the coupled quantum wells isrevealed.

Many-body Correlation Effects in the Spatially Separated Electron and Hole Layers in the Coupled Quantum Wells