Influence of the seed of measurement on the work extracted in a quantum Szilard engine
Marina Cuzminschi,
Alexei Zubarev,
Stefan-Marian Iordache,
Aurelian Isar
Affiliations
Marina Cuzminschi
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
Alexei Zubarev
Plasma Physics and Nuclear Fusion Laboratory, National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele, Ilfov, Romania; Extreme Light Infrastructure, National Institute for Physics and Nuclear Engineering, 07125 Magurele, Ilfov, Romania; Corresponding author
Stefan-Marian Iordache
Optospintronics Department, National Institute for Research and Development for Optoelectronics—INOE 2000, 077125 Magurele, Ilfov, Romania; Corresponding author
Aurelian Isar
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
Summary: 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).
