Driving the Dephasing Assisted Quantum Transport

Abstract

Nontrivial quantum effects in biological systems are of high interest among physicists over the past decade. They allow for information and energy to be exchanged with near-unity efficiency despite hindered by the warm, wet, and noisy environment. Several models suggests that the efficient quantum energy transport is due to the interplay between dephasing dynamics and unitary evolution of the disordered biological systems i.e in photosynthetic complex. However, the proposed models have not yet included the driving force depicting the external perturbation used in the experiment such as laser in 2D spectroscopy involved in the detection of the exciton transfer or an artificial quantum transport experiments. Here, we resolve this issue by subjecting the dephasing assisted transport model by Plenio and Huelga [New J. Phys. 10, 11 (2012)] to a driving force. We analyze dynamical evolution of the driven system and show that further efficiency enhancement achieved by driving the transport site. We also discuss some experimental realizations of the quantum transport system.

Study of Entangled K-meson and Its Decoherence

“…This phenomenon, called decoherence, could be measured quantitatively [7], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22]. On the other hand, open quantum theory, related to quantum transport [23], [24], [25], explains a total system which contains the system of interest and environment [26], [27], [28]. From this explanation, we know a decoherence phenomenon is important to be studied further so that we could utilize the effect from quantum mechanics better.…”

Environment-assisted quantum transport and mobility edges

“…Introduction.-Understanding and controlling the outof-equilibrium dynamics in open quantum systems are at the forefront of research in the field of quantum thermodynamics. One particular phenomenon which has attracted considerable attention, both theoretically [1][2][3][4][5][6][7][8][9][10][11][12][13] and experimentally [14][15][16][17][18], are the environment-assisted quantum transport (ENAQT) where moderate dephasing noise can enhance the transport efficiency. Fueled by the quest for sustainable energy, several studies has exploited the potential benefit from the interplay between coherence and dissipation in quantum devices such as to enhance the power of quantum heat engines [19][20][21][22].…”

“…In some specific cases, momentum rejuvenation [8], line-broadening [9], and superradiance [10] may additionally explain the high efficiency. Moreover, exposing the system to a periodic driving may increase the efficiency even further [12,13]. It is only revealed recently that the uniformity of steady state population plays more universal role in ENAQT [11].…”