Quantifying phonon-induced non-Markovianity in color centers in diamond

Norambuena, Ariel; Maze, J. R.; Rabl, Peter; Coto, Raúl

doi:10.1103/physreva.101.022110

Cited by 15 publications

(20 citation statements)

References 65 publications

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“…There are three cases: is commonly referred to as the “Ohmic bath”: Mesoscopic metal ring 50 , Josephson-junction circuits 51 , as the “sub-Ohmic bath”: Mesoscopic ring 50 , Nano-electro-mechanical devices 52 . as the “super-Ohmic bath”: InGaAs/GaAs quantum dot 53 , DBT-doped nanocrystal of anthracene 11 , SiV and NV centers in diamond 54 . Here is the cut-off function of the spectral density and there exists different form in the literature.…”

Section: Resultsmentioning

confidence: 99%

Unified master equation for molecules in phonon and radiation baths

Ooi

Chia

2022

Sci Rep

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We have developed a unified quantum optical master equation that includes the dissipative mechanisms of an impurity molecule in crystals. Our theory applies generally to polyatomic molecules where several vibrational modes give rise to intramolecular vibrational redistributions. The usual assumption on identical shapes of the nuclear potentials in ground and excited electronic states and the rotating wave approximation have been relaxed, i.e. the vibrational coordinates are different in the ground and excited states, with counter-rotating terms included for generality. Linear vibrational coupling to the lattice phonons accounts for dissipations via non-radiative transitions. The interaction of a molecule with photons includes Herzberg–Teller coupling as the first order non-Condon interaction where the transition dipole matrix elements depend linearly on vibrational coordinates. We obtain new cross terms as the result of mixing the terms from the zeroth-order (Condon) and first-order (non-Condon) approximations. The corresponding Lamb shifts for all Liouvilleans are derived explicitly including the contributions of counter-rotating terms. The computed absorption and emission spectra for carbon monoxide is in good agreement with experimental data. We use our unified model to obtain the spectra for nitrogen dioxide, demonstrating the capability of our theory to incorporate all typical dissipative relaxation and decoherence mechanisms for polyatomic molecules. The molecular quantum master equation is a promising theory for studying molecular quantum memory.

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Section: Resultsmentioning

confidence: 99%

Unified master equation for molecules in phonon and radiation baths

Ooi

Chia

2022

Sci Rep

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“…There are three cases: a) S = 1 is commonly referred to as the "Ohmic bath": Mesoscopic metal ring 52 , Josephson-junction circuits 53 , b) 0 < S < 1 as the "sub-Ohmic bath": Mesoscopic ring 52 , Nano-electro-mechanical devices 54 . c) S > 1 as the "super-Ohmic bath": InGaAs/GaAs quantum dot 55 , DBT-doped nanocrystal of anthracene 11 , SiV and NV centers in diamond 56 .…”

Section: Temperature Dependencementioning

confidence: 99%

“…The value of λ is usually determined by the fitting process. This functional form has been applied for DBT molecule in thin nano-crystals of anthracene 11 , electron-phonon coupling of color center in diamond 56 and InAs/GaAs quantum dots.…”

Section: /28mentioning

confidence: 99%

Unified Master Equation for Molecules in Phonon and Radiation Baths

Ooi

Chia

2022

Preprint

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We investigate the dissipative mechanisms of an impurity molecule in crystals using quantum optical master equation. Our unified theory applies generally to polyatomic molecules where several vibrational modes give rise to intramolecular vibrational redistributions. The usual assumption on identical shapes of the nuclear potentials in ground and excited electronic states and the rotating wave approximation have been relaxed, i.e. the vibrational coordinates are different in the ground and excited states, with counter-rotating terms included. Linear vibrational coupling to the lattice phonons accounts for dissipations via non-radiative transitions. The coupling to the electromagnetic field includes Herzberg-Teller interactions in the non-Condon approximation where the transition dipole matrix elements depend on vibrational coordinates. We obtain new cross terms as the result of mixing the terms from the zeroth-order Condon and first-order non-Condon approximations. The corresponding Lamb shifts for all Liouvilleans are derived explicitly including the contributions of counter-rotating terms. The absorption and emission spectra for carbon monoxide computed from our model is in good agreement with experimental data. We show that our unified model is capable of incorporating all typical dissipative relaxation and decoherence mechanisms. The molecular quantum master equation is promising for studies of molecular quantum memory.

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“…With improvements in dynamical decoupling techniques, sample fabrication and purification, and the possibility of room temperature operation, it is desirable to develop a predictive understanding of phonon-induced dephasing. Additionally, indications that phonon-induced dephasing introduce non-Markovianity into the system 18 necessitate further study of phonon-induced processes in these systems.…”

Section: Introductionmentioning

confidence: 99%

Phonon Induced Spin Dephasing Time of Nitrogen Vacancy Centers in Diamond from First Principles

Simoni

2022

Preprint

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Spin qubits with long dephasing times are an essential requirement for the development of new quantum technologies and have many potential applications ranging from quantum information processing to quantum memories and quantum networking. Here we report a theoretical study and the calculation of the spin dephasing time of defect color centers for the negatively charged nitrogen vacancy center in diamond. We employ ab initio density functional theory to compute the electronic structure, and extract the dephasing time using a cumulant expansion approach. We find that phonon-induced dephasing is a limiting factor for T_2 at low temperatures, in agreement with recent experiments that use dynamical decoupling techniques. This approach can be generalized to other spin defects in semiconductors, molecular systems, and other band gapped materials.

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Quantifying phonon-induced non-Markovianity in color centers in diamond

Cited by 15 publications

References 65 publications

Unified master equation for molecules in phonon and radiation baths

Unified master equation for molecules in phonon and radiation baths

Unified Master Equation for Molecules in Phonon and Radiation Baths

Phonon Induced Spin Dephasing Time of Nitrogen Vacancy Centers in Diamond from First Principles

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