Mollow triplet in cold atoms

Ortiz-Gutiérrez, Luis; Teixeira, Renata Cordeiro; Eloy, Aurélien; Silva, Dilleys Ferreira da; Kaiser, Robin; Bachelard, Romain; Fouché, Mathilde

doi:10.1088/1367-2630/ab3ca9

Cited by 30 publications

(21 citation statements)

References 41 publications

(85 reference statements)

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“…In this so-called dressed-state picture, the energy levels of the composite qubit-field system are split due to the dynamic Stark effect promoted by the drive. The Mollow triplet has been verified experimentally in many different physical scenarios [30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 84%

Assessment of weak-coupling approximations on a driven two-level system under dissipation

et al. 2021

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The standard weak-coupling approximations associated to open quantum systems have been extensively used in the description of a two-level quantum system, qubit, subjected to relatively weak dissipation compared with the qubit frequency. However, recent progress in the experimental implementations of controlled quantum systems with increased levels of on-demand engineered dissipation has motivated precision studies in parameter regimes that question the validity of the approximations, especially in the presence of time-dependent drive fields. In this paper, we address the precision of weak-coupling approximations by studying a driven qubit through the numerically exact and non-perturbative method known as the stochastic Liouville-von Neumann equation with dissipation. By considering weak drive fields and a cold Ohmic environment with a high cutoff frequency, we use the Markovian Lindblad master equation as a point of comparison for the SLED method and study the influence of the bath-induced energy shift on the qubit dynamics. We also propose a metric that may be used in experiments to map the regime of validity of the Lindblad equation in predicting the steady state of the driven qubit. In addition, we study signatures of the well-known Mollow triplet and observe its meltdown owing to dissipation in an experimentally feasible parameter regime of circuit electrodynamics. Besides shedding light on the practical limitations of the Lindblad equation, we expect our results to inspire future experimental research on engineered open quantum systems, the accurate modeling of which may benefit from non-perturbative methods.

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Section: Introductionmentioning

confidence: 84%

Assessment of weak-coupling approximations on a driven two-level system under dissipation

et al. 2021

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“…In this limit of very high N, by taking the real part of the Fourier transform of the correlation function for the dipole-moment operator [13,50], the incoherent part of the resonance fluorescence spectrum of a monochromatically doubly dressed two-level system is given by ofñ peaks with FWHM of 3 2 , associated with the red-dashed (blue-dotted) transitions in Fig. 2(a).…”

Section: Doubly Dressed Two-level Systemmentioning

confidence: 99%

“…Recent progress in growth and manipulation of nanometric heterostructures has indeed demonstrated the analogy between atoms and solid-state zero-dimensional systems to impressive levels, so that despite emerging in the quantum optics realm decades after natural atoms, QD-based emitters for many purposes not only match but potentially may also surpass their atomic counterpart [3,4].…”

Section: Introductionmentioning

confidence: 99%

Thermal effects on the resonance fluorescence of doubly dressed artificial atoms

Macías-Pinilla

Ramírez

2020

Phys. Rev. A

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In this work, robustness of controlled density of optical states in doubly driven artificial atoms is studied under phonon dissipation. By using both perturbative and polaron approaches, we investigate the influence of carrier-phonon interactions on the emission properties of a two-level solid-state emitter, simultaneously coupled to two intense distinguishable lasers. Phonon decoherence effects on the main features of the emission spectra are found to be modest up to neon boiling temperatures (∼30 K), as compared with photon generation at the Fourier transform limit obtained in the absence of lattice vibrations (zero temperature). These results show that optical switching and photonic modulation by means of double dressing do not require ultralow temperatures for implementation, thus boosting their potential technological applications.

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“…The coherent atomic oscillations modulate the laser driving field, and spontaneous emission acts as a detection tool for the triplet energy levels [2]. The Mollow triplet structure has been observed in atomic beams [3], ions [4], single molecules [5], quantum dots [6][7][8][9], superconducting qubits [10], and cold atoms [11]. Its potential applications, such as heralded single-photon sources [12], quantum sensing [13][14][15], and spin noise characterization [16], make it a versatile tool in physics.…”

Section: Introductionmentioning

confidence: 99%

“…In previous experiments [3][4][5][6][7][8][9][10][11][17][18][19] that showed the Mollow triplet, the driving strength was smaller than the static splitting, allowing one to conveniently solve the dynamics using the rotating wave approximation (RWA). Previous the-* gq_wang@mit.edu † pcappell@mit.edu oretical studies beyond the RWA have predicted frequency shifts, imbalanced sidebands, and high-order frequency components [20][21][22], yet experimental verification is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Observation of the high-order Mollow triplet by quantum mode control with concatenated continuous driving

2021

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The Mollow triplet is a fundamental signature of quantum optics and has been observed in numerous quantum systems. Although it arises in the "strong driving" regime of the quantized field, where the atoms undergo coherent oscillations, it can be typically analyzed within the rotating wave approximation. Here we report the first observation of high-order effects in the Mollow triplet structure due to strong driving. In experiments, we explore the regime beyond the rotating wave approximation using concatenated continuous driving that has less stringent requirements on the driving field power. We are then able to reveal additional transition frequencies, shifts in energy levels, and corrections to the transition amplitudes. In particular, we find that these amplitudes are more sensitive to high-order effects than the frequency shifts and that they still require an accurate determination in order to achieve high-fidelity quantum control. The experimental results are validated by Floquet theory, which enables the precise numerical simulation of the evolution and further provides an analytical form for an effective Hamiltonian that approximately predicts the spin dynamics beyond the rotating wave approximation.

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Mollow triplet in cold atoms

Cited by 30 publications

References 41 publications

Assessment of weak-coupling approximations on a driven two-level system under dissipation

Assessment of weak-coupling approximations on a driven two-level system under dissipation

Thermal effects on the resonance fluorescence of doubly dressed artificial atoms

Observation of the high-order Mollow triplet by quantum mode control with concatenated continuous driving

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