Dependence of the decoherence of polarization states in phase-damping channels on the frequency spectrum envelope of photons

Abstract

We consider the decoherence of photons suffering in phase-damping channels. By exploring the evolutions of single-photon polarization states and two-photon polarization-entangled states, we find that different frequency spectrum envelopes of photons induce different decoherence processes. A white frequency spectrum can lead the decoherence to an ideal Markovian process. Some color frequency spectrums can induce asymptotical decoherence, while, some other color frequency spectrums can make coherence vanish periodically with variable revival amplitudes. These behaviors result from the non-Markovian effects on the decoherence process, which may give rise to a revival of coherence after complete decoherence.

Decoherence effects in interacting qubits under the influence of various environments

“…where we have assumed A = B = for simplicity. From equation (30) it is clearly seen that in a purely dephasing environment entanglement among the qubits is independent of the initial coherence given by χ and depends only on a and 0 . In figure 11 we plot the time dependence of concurrence for a = 0.2.…”

“…Note that an earlier proposal has discussed a plausible experiment to observe ESD in cavity QED and trapped ion systems [28]. The phenomenon of ESD has motivated numerous theoretical investigations in other bi-partite systems involving pairs of atomic, photonic and spin qubits [29][30][31][32], multiple qubits [33] and spin chains [34][35][36]. Further ESD has also been studied for different environments including collective vacuum noise [38], classical noise [39] and thermal noise [40][41][42].…”

Finite-Time Destruction of Entanglement and Non-Locality by Environmental Influences

“…The study of coherence and entanglement in this field has been especially well researched, due to their relation to practical quantum communications technologies. For example, Gong, Zhang, Dong, Niu, Huang, and Guo considered states of single-and double-photon polarization states subject to local phase noise [45], in the form of Eq. 46, again with z = 0.…”

Entanglement engineering of a close bipartite atomic system in a dissipative environment

“…ESD has been examined in several model situations involving pairs of atoms, photons and spin qubits [20][21][22]. Almeida et al [23] have experimentally found the existence of sudden death of entanglement by using correlated horizontal and vertical polarized photons.…”