Observations of a doubly driven V system probed to a fourth level in laser-cooled rubidium

Echaniz, S. R. de; Greentree, Andrew D.; Durrant, A.V.; Segal, D. M.; Marangos, J. P.; Vaccaro, John A.

doi:10.1103/physreva.64.013812

Cited by 41 publications

(45 citation statements)

References 35 publications

(29 reference statements)

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“…The increase in the oscillation frequency in the region −δ − Ω c < ∆ q < −δ + Ω c is a consequence of an increased eigenvalue splitting, similar to (but more complicated than) that seen in multiply coupled three state systems, see for example Ref. 18. In the simpler, doubly-driven three-state case, the oscillation frequency is given by the sum of the squares of the Rabi frequencies of the driving fields.…”

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confidence: 99%

Quantum gate forQswitching in monolithic photonic-band-gap cavities containing two-level atoms

et al. 2006

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Photonic bandgap cavities are prime solid-state systems to investigate light-matter interactions in the strong coupling regime. However, as the cavity is defined by the geometry of the periodic dielectric pattern, cavity control in a monolithic structure can be problematic. Thus, either the state coherence is limited by the read-out channel, or in a high Q cavity, it is nearly decoupled from the external world, making measurement of the state extremely challenging. We present here a method for ameliorating these difficulties by using a coupled cavity arrangement, where one cavity acts as a switch for the other cavity, tuned by control of the atomic transition.PACS numbers: 42.50. Pq, 42.70.Qs, 42.60.Gd, As the maturity and sophistication of quantum optics progresses, there is a growing movement to translate such effects into practical devices. This impetus suggests, for reasons of scalability and practicality, the need for viable solid-state technologies to produce and distribute single photons as an enabling technology for derivative quantum devices. In particular we are concerned with the role played by cavity Quantum Electro-Dynamics (CQED) in such devices.CQED has been used to great effect in the generation of deterministic, transform limited single (and higherorder Fock states) photon pulses [1], and schemes exist which incorporate CQED for quantum computing [2], and entanglement generation [3]. More recently 'hybrid' schemes for quantum computation have been suggested incorporating matter qubits in cavities with single photon generation, linear optics and high fidelity photon detection [4]. However many of these schemes (with notable exceptions) will be problematic to scale or to remove from laboratory environments.Given difficulties with implementing most present schemes in non-research environments, significant attention has turned towards photonic band gap (PBG) cavities as quantum cavities. This is due to their superb photonic confinement properties and the recent realization of high Q cavities with small mode volume (of order the wavelength 3 ) [5,6]. These successes have been fueled by a combination of technological imperatives and advances in fabrication.

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confidence: 99%

Quantum gate forQswitching in monolithic photonic-band-gap cavities containing two-level atoms

et al. 2006

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“…Moreover, we have shown here that in these molecules amplification on probe field of shorter wavelength can be achieved using coupling laser of larger wavelength in Λ-transition scheme which has not been observed in atomic systems [30,31].…”

Section: Gainmentioning

confidence: 98%

Control of amplification without inversion in H2 and LiH molecules: Dependence on relative magnitude of probe and coherent field Rabi frequencies in three-level Λ system

Dutta

Dastidar

2006

Pramana - J Phys

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Dependence of amplification without inversion (AWI) on the relative strength of probe and coherent field Rabi frequencies has been studied in H 2 and LiH molecules for three-level Λ configuration. We have derived exact analytical expressions for coherences and populations keeping all the orders of probe field Rabi frequency (G) and coherent field Rabi frequency (Ω) in the steady state limit. Previously, first-order approximation (i.e. keeping only the first-order term in G) was used and hence AWI was studied for the condition Ω G. Here, by using the exact analytical expressions of coherences and populations, we have shown that AWI is maximum when Ω is within the same order of probe field Rabi frequency G irrespective of the choice of different ro-vibrational transitions in both the molecules. However, the shape of the gain profile and the maximum value of gain on the probe field and the absorption on coherent field depend on the choice of different ro-vibrational levels as the upper lasing levels. Effect of bidirectional pumping, homogeneous and inhomogeneous broadening on AWI process has been studied. By solving the density matrix equations numerically it has been shown that both the transient and the steady state AWI can be obtained and the numerical values of coherences and populations at large time are in very good agreement with exact analytical values in the steady state limit. It has been shown that in molecules AWI can be obtained on probe field of smaller wavelength than that of the coherent field which has not been observed in atoms so far.

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“…This was the method adopted in our experiments and it is out of the scope of this paper to analyze other methods. However, for a short survey of the ones published in articles [66][67][68][69], we refer to [63].…”

Section: Iv1 Details Of the Applied Scheme For Generating Multiple mentioning

confidence: 99%

Electromagnetically Induced Transparency

Kowalski

Long²,

Xuan³

et al. 2010

CMST

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Abstract:In the initial part of the paper, the principles of the electromagnetically induced transparency (EIT) in basic three-level schemes are sketched, and some applications of this phenomenon are described. Next a presentation follows of a five-level EIT model of Bloch equations, which was developed to reconstruct multipeak cascade-EIT spectra registered in a sample of cold 85 Rb atoms in MOT. The respective experiment is also described. The achieved good agreement between theory and performed experiment is documented and discussed.

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Observations of a doubly driven V system probed to a fourth level in laser-cooled rubidium

Cited by 41 publications

References 35 publications

Quantum gate forQswitching in monolithic photonic-band-gap cavities containing two-level atoms

Quantum gate forQswitching in monolithic photonic-band-gap cavities containing two-level atoms

Control of amplification without inversion in H2 and LiH molecules: Dependence on relative magnitude of probe and coherent field Rabi frequencies in three-level Λ system

Electromagnetically Induced Transparency

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