Observation of non-Markovianity at room temperature by prolonging entanglement in solids

Peng, Shijie; Xu, Xiangkun; Xu, Kebiao; Huang, Pu; Wang, Pengfei; Kong, Xinggong; Rong, Xing; Shi, Fazhan; Duan, Chang‐Kui; Du, Jiangfeng

doi:10.1016/j.scib.2018.02.017

Cited by 16 publications

(16 citation statements)

References 46 publications

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“…Comparing the population dynamics in Equation (30) and Equation (31), we immediately find γ + (t) = γ − (t) = γ. Now, separating the contributions from the absolute value and the phase in c(t) and considering γ ω 0 , we find that the rates in the PC master equation (13) reproducing the behavior in Equation (30) to first order in γ are given by…”

Section: Role Of Multiple Initial Conditionsmentioning

confidence: 88%

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Non-monotonic Population and Coherence Evolution in Markovian Open-System Dynamics

Haase

Smirne

Huelga

2019

Springer Proceedings in Physics

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We consider a simple microscopic model where the open-system dynamics of a qubit, despite being Markovian, shows features which are typically associated to the presence of memory effects. Namely, a non monotonic behavior both in the population and in the coherence evolution arises due to the presence of non-secular contributions, which break the phase covariance of the Lindbladian (semigroup) dynamics. We also show by an explicit construction how such a non-monotonic behaviour can be reproduced by a phase covariant evolution, but only at the price of inserting some state-dependent memory effects.

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Section: Role Of Multiple Initial Conditionsmentioning

confidence: 88%

“…Artificial PC evolution mimicking an NPC dynamics. The thick blue lines show p(t) and |c(t)| for the NPC dynamics, see Equation (30), for ϕ = π/2 and θ = π/3 with ω 0 = 10 and γ = 1. The red dashed lines show the population and coherence for the artificially created PC dynamics as in Eqs.…”

Section: Role Of Multiple Initial Conditionsmentioning

confidence: 99%

Non-monotonic Population and Coherence Evolution in Markovian Open-System Dynamics

Haase

Smirne

Huelga

2019

Springer Proceedings in Physics

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“…We regarded a proper kind of molecule in isotropic liquid as this composite system in our experiments discussed in section 3. Our model may be considered as an abstraction of systems that show non-exponential relaxations [16][17][18][19].…”

Section: Engineered Environmentmentioning

confidence: 99%

“…There are the experiments with ultra cold atoms [9], ions in traps [10], optics [11], and cold electric circuits [12] to study open systems. Experimental controls of the degree of non-Markovianity in optics [13][14][15], ion traps [16], NV centers in diamond [17][18][19], and NMR [20] are most important for our work. We have also reported some preliminary results [21,22].…”

Section: Introductionmentioning

confidence: 99%

Realization of controllable open system with NMR

Matsuzaki

et al. 2019

New J. Phys.

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An open quantum system is now attracting much attention because a quantum device such as quantum computers and quantum sensors is an emerging technology. Here, we present a model of the open system that shows either time-homogeneous Markovian relaxations or non-Markovian relaxations depending on its parameters that we can control. This model is fully described with the master equation that is analytically solvable. More importantly, this model can be easily realized with molecules in isotropic liquids and measured with NMR techniques. V 1 1 , J J J J t t J J J t J t t J J J t J

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“…[27]. Note that NV centers have been used also in two other recent studies to study non-Markovian effects and for the control of entanglement dynamics [40,41].…”

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confidence: 99%

Non-Markovian quantum dynamics: What is it good for?

Guo

Piilo

2020

EPL

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Recent developments in practical quantum engineering and control techniques have allowed significant developments for experimental studies of open quantum systems and decoherence engineering. Indeed, it has become possible to test experimentally various theoretical, mathematical, and physical concepts related to non-Markovian quantum dynamics. This includes experimental characterization and quantification of non-Markovian memory effects and proof-ofprinciple demonstrations how to use them for certain quantum communication and information tasks. We describe here recent experimental advances for open system studies, focussing in particular to non-Markovian dynamics including the applications of memory effects, and discuss the possibilities for ultimate control of decoherence and open system dynamics.Introduction. -Closed quantum systems evolve by unitary dynamics conserving, e.g., the purity of the evolving quantum state. Thereby, having ability to prepare any initial pure quantum state for a given system, and having arbitrary time dependent and controllable Hamiltonian driving the system, allows to create any pure state trajectory in the system's Hilbert space -at least in principle. For an open quantum system interacting with its environment, the problematics of quantum control becomes more challenging. An open system, whose Hamiltonian we may be able to control to certain extent, interacts with a large number of uncontrollable degrees of freedom. The open system dynamics becomes non-unitary and the systemenvironment interaction tends, e.g., to reduce the purity of the open system state via decoherence, i.e., making it more mixed and classical-like. The question now becomes how can we control, not only how decoherence influences the open system dynamics, but also whether it is possible to control the loss of purity -and even increase the purity and revive the quantum properties at least temporarily?

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Observation of non-Markovianity at room temperature by prolonging entanglement in solids

Cited by 16 publications

References 46 publications

Non-monotonic Population and Coherence Evolution in Markovian Open-System Dynamics

Non-monotonic Population and Coherence Evolution in Markovian Open-System Dynamics

Realization of controllable open system with NMR

Non-Markovian quantum dynamics: What is it good for?

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