In this work, we introduce a three-stroke quantum engine with a single-qubit working substance whose cycle consists of two strokes arise due to performing two distinct general quantum measurements and it is completed by thermalization through contact with a finite temperature thermal reservoir. It is demonstrated that energy is imported into the engine by first measurement channel and work (useful energy) is extracted from it, in a frictionless isentropic manner, by the second measurement channel. It is particularly shown that the engine is capable to have perfect efficiency. In continuation, we equip the engine cycle with two additional adiabatic strokes. As illustrated, the presence of adiabatic strokes in the cycle provide an improved lower bound for the parametrized efficiency range of the engine.

在这项工作中，我们介绍了一种具有单量子位工作物质的三冲程量子引擎，该引擎的循环由两个冲程组成，这是由于执行两次不同的常规量子测量而产生的，并且通过与有限温度储热器的接触进行热化来完成。已经证明，能量通过第一测量通道被导入发动机，并且功（有用能量）通过第二测量通道以无摩擦的等熵方式从发动机中提取出来。特别表明，该发动机具有完美的效率。接下来，我们为发动机循环增加了两个绝热冲程。如图所示，在循环中绝热冲程的存在为发动机的参数化效率范围提供了改善的下限。