Partners and Quantum Information Capsules

 Where do entangled quantum systems store information in a total pure state? This question is nontrivial and interesting since the entanglement among subsystems delocalizes the information, and is significantly related to the information loss problem of evaporating black holes.  So far, a common picture is that of a subsystem and its purification partner sharing the information quantum mechanically. For entangled multiple qubits in an arbitrary pure state, we introduce a new picture of a single qubit in the correlation space referred to as quantum information capsule (QIC), confining the information perfectly.  Unlike the partner picture, in the QIC picture, by swapping the single-body state, leaving other subsystems untouched, the whole information can be retrieved out of the system. After the swapping process, no information remains in the system.