We looked for pulse sequence of four-qubit entangled binary balanced function where there is no only two-qubit and two-qubit pair entanglement, implemented 4-bit NMR(Nuclear Magnetic Resonance) ensemble quantum computer of refined Deutsch-Jozsa algorithm.
The sample of 4 bit is ethyl acetacetate where four home-nuclear carbons are qubits. We used thermal equilibrium state instead of effective pure state because consists of only z-pulse and coupling, the results are the same. Therefore, the experiment is simple..
We first implemented 4-bit NMR ensemble quantum computer of refined Deutsch-Jozsa algorithm by four-qubit entanglement function of refined Deutsch-Jozsa algorithm.
