37 research outputs found
Delineating incoherent non-Markovian dynamics using quantum coherence
We introduce a method of characterization of non-Markovianity using coherence
of a system interacting with the environment. We show that under the allowed
incoherent operations, monotonicity of a valid coherence measure is affected
due to non-Markovian features of the system-environment evolution. We also
define a measure to quantify non-Markovianity of the underlying dynamics based
on the non-monotonic behavior of the coherence measure. We investigate our
proposed non-Markovianity marker in the behavior of dephasing and dissipative
dynamics for one and two qubit cases. We also show that our proposed measure
captures the back-flow of information from the environment to the system and
compatible with well known distinguishability criteria of non-Markovianity.Comment: 5 pages, 3 figure
Quantum Path predictability for an electronic Mach-Zehnder interferometer in presence of environment induced Decoherence and Quantum Erasing process
In this paper, we have estimated the temperature dependent path
predictability for an electronic Mach-Zehnder interferometer. The increment of
path predictability can directly be associated with stronger decoherence
process. We have also theoretically predicted that placing two detectors in
both the paths, which are at the same equilibrium temperature with the system,
erases all the memory of path information and hence acts like a quantum eraser.Comment: 5 pages, 2 figure
Hartman effect and dissipative quantum systems
The dwell time for dissipative quantum system is shown to increase with
barrier width. It clearly precludes Hartman effect for dissipative systems.
Here calculation has been done for inverted parabolic potential barrier.Comment: article consists of 5 pages, 2 figure