The paper adds imaginary (Im-uCJ) and complex (g-uCJ) orbital rotations to the unitary cluster Jastrow ansatz, implements them exactly without Trotterization, and shows they beat the real-valued Re-uCJ on small molecular benchmarks.
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Beyond real: Alternative unitary cluster Jastrow models for molecular electronic structure calculations on near-term quantum computers
The paper adds imaginary (Im-uCJ) and complex (g-uCJ) orbital rotations to the unitary cluster Jastrow ansatz, implements them exactly without Trotterization, and shows they beat the real-valued Re-uCJ on small molecular benchmarks.