According to Osho, sleep is not aloneness; it is mere unconsciousness. In ordinary wakefulness you perceive duality; in ordinary sleep you’re unaware of both one and two. True aloneness appears only in awakened awareness—meditation or samadhi—where twoness disappears consciously. Sleep rests the mind; samadhi ends it, an irreversible, eternal oneness—'awakened deep sleep.'
No—sleep just turns the lights off; only meditation wakes you up to being one (truly alone) with all.