A four-spin quantum Otto engine with an ancilla-pair measurement replacing the cold bath is numerically shown to exceed the single-qubit Otto efficiency limit, with the enhancement controlled by ancilla parameters.
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Ancilla measurement-based Quantum Otto engine using double-pair spin architecture
A four-spin quantum Otto engine with an ancilla-pair measurement replacing the cold bath is numerically shown to exceed the single-qubit Otto efficiency limit, with the enhancement controlled by ancilla parameters.