论文标题
使用量子，相干和热灯的测量成本的能量成本
Energetic cost of measurements using quantum, coherent, and thermal light
论文作者
论文摘要
量子测量是基本操作，在量子信息的研究和应用中起着至关重要的作用。我们研究电路量子电动力学设置中量子，相干和经典的光状态如何通过比较它们各自的测量背部和测量信号与每个光子的噪声比来影响量子测量的性能。在强分散极限下，我们发现热光能够以与一致光相当的效率进行量子测量，两者都超过单光子光。然后，我们分析每个测量方案的热力学成本。我们表明，单光子灯在每个信息增益中显示出优势，达到了基本的热力学成本。
Quantum measurements are basic operations that play a critical role in the study and application of quantum information. We study how the use of quantum, coherent, and classical thermal states of light in a circuit quantum electrodynamics setup impacts the performance of quantum measurements, by comparing their respective measurement backaction and measurement signal to noise ratio per photon. In the strong dispersive limit, we find that thermal light is capable of performing quantum measurements with comparable efficiency to coherent light, both being outperformed by single-photon light. We then analyze the thermodynamic cost of each measurement scheme. We show that single-photon light shows an advantage in terms of energy cost per information gain, reaching the fundamental thermodynamic cost.
