Quantum Cobweb: Multiparty Entangling of an unknown Qubit

Entangling an unknown qubit with one type of reference state is generally impossible. We introduce a new class of states called zero sum amplitude (ZSA) multipartite, pure entangled states for qubits and study their salient features. Using shared-ZSA state, local operation and classical communication we give a protocol for creating multipartite entangled states of an unknown quantum state with two types of reference states at remote places. This provides a way of encoding an unknown pure qubit state into two types of entangled multiqubit system. The resulting entangled state we call a quantum cobweb. We quantify the amount of classical and quantum resource required to create quantum cobwebs. This may provide a way to preserve secret information by entangling an unknown state with multiparties.