Quantum interference between independent reservoirs in open quantum systems

Chan, Ching-Kit; Lin, Guin-Dar; Yelin, Susanne F.; Lukin, Mikhail D.

doi:10.1103/physreva.89.042117

Cited by 44 publications

(39 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, what will happen if the system is coupled simultaneously to many environments? The consideration of simultaneous affections of multiple environments on a open system is relevant in many realistic situations where the system may be strongly coupled to a principal environment and meanwhile weakly to the minor ones [27,28]. For example, in a quantum dot the electron spin may be influenced strongly by the surrounding nuclei and weakly by the phonons [29].…”

Section: Introductionmentioning

confidence: 99%

Non-Markovianity of a two-level system transversally coupled to multiple bosonic reservoirs

Man

Xia

2014

Phys. Rev. A

View full text Add to dashboard Cite

Dynamics of a two-level open system transversally coupled to a single zero-temperature bosonic reservoir may be Markovian or non-Markovian, depending on whether the system-reservoir coupling is weak or strong. In this paper, we show that when the system is simultaneously coupled to N reservoirs its dynamics is always non-Markovian, provided that N N cr , with N cr a critical number depending on the reservoirs' parameters. Quantitatively, the non-Markovianity N is shown proportional to the number of contributed reservoirs. We explain our results in terms of the pseudomode theory, finding out that when N N cr the pseudomodes of all the reservoirs can always partially return information back to the system, no matter how strong the couplings between the system and each individual reservoir.

show abstract

Section: Introductionmentioning

confidence: 99%

Non-Markovianity of a two-level system transversally coupled to multiple bosonic reservoirs

Man

Xia

2014

Phys. Rev. A

View full text Add to dashboard Cite

show abstract

“…Viewed broadly, these investigations indicate that the local and global Lindblad equations are only accurate in limited, complementary parameter regimes, and only for certain observables, even though the requisite conditions for the BMA might hold for each bath individually. On the other hand, a few recent papers have shown that the additivity assumption fails in the presence of multiple strong or structured noise sources [54][55][56].…”

mentioning

confidence: 99%

Non-additive dissipation in open quantum networks out of equilibrium

2018

View full text Add to dashboard Cite

We theoretically study a simple non-equilibrium quantum network whose dynamics can be expressed and exactly solved in terms of a time-local master equation. Specifically, we consider a pair of coupled fermionic modes, each one locally exchanging energy and particles with an independent, macroscopic thermal reservoir. We show that the generator of the asymptotic master equation is not additive, i.e. it cannot be expressed as a sum of contributions describing the action of each reservoir alone. Instead, we identify an additional interference term that generates coherences in the energy eigenbasis, associated with the current of conserved particles flowing in the steady state. Notably, non-additivity arises even for wide-band reservoirs coupled arbitrarily weakly to the system. Our results shed light on the non-trivial interplay between multiple thermal noise sources in modular open quantum systems.

show abstract

“…However, in several realistic scenarios the system may be simultaneously influenced by many environments [45][46][47][48][49]. For instance, in a quantum dot the electron spin may be affected strongly by the surrounding nuclei and weakly by the phonons [45].…”

Section: Introductionmentioning

confidence: 99%

“…Motivated by these practical situations [45][46][47], some efforts have been devoted to study the effects of multiple environments on the dynamics of an open system [48][49][50][51][52]. Quantum interference effects have been found to occur between independent reservoirs when all of them interact with a quantum system and are in non-Markovian regimes, which qualitatively modify the dynamics of the interested system [48]. The dynamics of a spin simultaneously coupled to two decoherence channels, one Markovian and the other non-Markovian, has been analyzed with respect to the different decoherence mechanisms [49].…”

Section: Introductionmentioning

confidence: 99%

“…In the treatments of composite environments [48][49][50], the role of the coupling between environmental parts is not typically taken into account. Despite this, the knowledge of how this environmental parameter influences the non-Markovian character of an open quantum system would provide insightful developments for engineering and controlling quantum memories for possible technological applications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Harnessing non-Markovian quantum memory by environmental coupling

2015

View full text Add to dashboard Cite

Controlling the non-Markovian dynamics of open quantum systems is essential in quantum information technology since it plays a crucial role in preserving quantum memory. Albeit in many realistic scenarios the quantum system can simultaneously interact with composite environments, this condition remains little understood, particularly regarding the effect of the coupling between environmental parts. We analyze the non-Markovian behavior of a qubit interacting at the same time with two coupled single-mode cavities which in turn dissipate into memoryless or memory-keeping reservoirs. We show that increasing the control parameter, that is the two-mode coupling, allows for triggering and enhancing a non-Markovian dynamics for the qubit starting from a Markovian one in absence of coupling. Surprisingly, if the qubit dynamics is non-Markovian for zero control parameter, increasing the latter enables multiple transitions from non-Markovian to Markovian regimes. These results hold independently on the nature of the reservoirs. This work highlights that suitably engineering the coupling between parts of a compound environment can efficiently harness the quantum memory, stored in a qubit, based on non-Markovianity.

show abstract

Quantum interference between independent reservoirs in open quantum systems

Cited by 44 publications

References 49 publications

Non-Markovianity of a two-level system transversally coupled to multiple bosonic reservoirs

Non-Markovianity of a two-level system transversally coupled to multiple bosonic reservoirs

Non-additive dissipation in open quantum networks out of equilibrium

Harnessing non-Markovian quantum memory by environmental coupling

Contact Info

Product

Resources

About