Cuzminschi Marina, Zubarev Alexei, Iordache Stefan-Marian, Isar Aurelian
Department of Theoretical Physics, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 07125 Magurele, Ilfov, Romania.
Faculty of Physics, University of Bucharest, 077125 Magurele, Ilfov, Romania.
iScience. 2023 Nov 24;26(12):108563. doi: 10.1016/j.isci.2023.108563. eCollection 2023 Dec 15.
We investigate the influence of the seed of measurement on the performance of a Szilard engine based on a two-mode Gaussian state evolving in a noisy channel. Quantum work is extracted by performing a positive operator-valued measurement (POVM) on one of the two modes, after which this mode reaches equilibrium with the environment. As the seed of measurement, we use a single-mode squeezed thermal state. We employ the Markovian Kossakowski-Lindblad master equation to determine the evolution in time of the considered open system and the quantum work is defined based on the Rényi entropy of order 2. We show that the extracted quantum work and information-work efficiency strongly depend on the characteristic parameters of the system (frequency, average thermal photons number, and squeezing), the noisy channel (temperature and squeezing of the bath), and the seed of measurement (average thermal photons number and strength of the measurement).
我们研究了测量种子对基于在噪声信道中演化的双模高斯态的齐拉德引擎性能的影响。通过对两个模式之一进行正算子值测量（POVM）来提取量子功，在此之后该模式与环境达到平衡。作为测量种子，我们使用单模压缩热态。我们采用马尔可夫科萨克夫斯基 - 林德布拉德主方程来确定所考虑的开放系统的时间演化，并且基于二阶雷尼熵来定义量子功。我们表明，提取的量子功和信息 - 功效率强烈依赖于系统的特征参数（频率、平均热光子数和压缩）、噪声信道（热库的温度和压缩）以及测量种子（平均热光子数和测量强度）。
