Highly Coherent Spectroscopy of Ultracold Atoms and Molecules in Optical Lattices

Zelevinsky, Tanya; Blatt, Sebastian; Boyd, Martin M.; Campbell, Gretchen K.; Ludlow, Andrew D.; Ye, Jun

doi:10.1002/cphc.200700713

Cited by 11 publications

(13 citation statements)

References 74 publications

(99 reference statements)

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“…(7)] is shown in Fig. 5 for all bound levels below the 1 S + 3 P 1 dissociation limit for two temperatures, T = 2 μK [29] and T = 20 μK [17]. The absorption coefficient for the levels that were experimentally observed [17] are shown in the inset of Fig.…”

Section: Numerical Results and Discussionmentioning

confidence: 96%

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Formation of deeply bound ultracold Sr2molecules by photoassociation near the1S+3

2012

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We predict feasibility of the photoassociative formation of Sr 2 molecules in arbitrary vibrational levels of the electronic ground state based on state-of-the-art ab initio calculations. Key is the strong spin-orbit interaction between the c 3 u , A 1 + u , and B 1 + u states. It creates not only an effective dipole moment allowing free-tobound transitions near the 1 S + 3 P 1 intercombination line but also facilitates bound-to-bound transitions via resonantly coupled excited-state levels to deeply bound levels of the ground X 1 + g potential, with v as low as v = 6. The spin-orbit interaction is responsible for both optical pathways. Therefore, those excited-state levels that have the largest bound-to-bound transition moments to deeply bound ground-state levels also exhibit a sufficient photoassociation probability, comparable to that of the lowest weakly bound excited-state level previously observed by Zelevinsky et al. [Phys. Rev. Lett. 96, 203201 (2006)]. Our study paves the way for an efficient photoassociative production of Sr 2 molecules in ground-state levels suitable for experiments testing the electron-to-proton mass ratio.At low laser intensity I , the stimulated emission rate is given by Fermi's golden rule expression: γ s v J (E,J ) = 4π 2 I c J M =−J J M =−J

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Section: Numerical Results and Discussionmentioning

confidence: 96%

“…We consider 88 Sr atoms trapped at a temperature of T ∼ 2 μK, typical for the two-color mangeto-optical traps employed for the alkaline-earth-metal species [29]. At such a low temperature, the collisions are purely s wave, i.e., J = 0.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Formation of deeply bound ultracold Sr2molecules by photoassociation near the1S+3

2012

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“…It may introduce broadening via motional shifts, which are strongly dependent on the well depths required for trapping. 47 Such shifts have been avoided for ultracold atoms by use of "magic" optical trapping conditions, 48 but there might be less scope to do that for molecules. As yet, no linewidth data have been reported for ultracold molecules trapped in an optical lattice and subject to a sizable electric field.…”

Section: Inducing Large Entanglement Via Resonant Pulsesmentioning

confidence: 99%

Entanglement of polar symmetric top molecules as candidate qubits

Kais

Friedrich

et al. 2011

The Journal of Chemical Physics

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Proposals for quantum computing using rotational states of polar molecules as qubits have previously considered only diatomic molecules. For these the Stark effect is second-order, so a sizable external electric field is required to produce the requisite dipole moments in the laboratory frame. Here we consider use of polar symmetric top molecules. These offer advantages resulting from a first-order Stark effect, which renders the effective dipole moments nearly independent of the field strength. That permits use of much lower external field strengths for addressing sites. Moreover, for a particular choice of qubits, the electric dipole interactions become isomorphous with NMR systems for which many techniques enhancing logic gate operations have been developed. Also inviting is the wider chemical scope, since many symmetric top organic molecules provide options for auxiliary storage qubits in spin and hyperfine structure or in internal rotation states.

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“…[3][4][5][6][7] and references cited therein). The variety of recently developed cold-molecule sources reflects the interest in the many exciting potential applications such as ultra-high resolution spectroscopy, [8] quantum-information processing [9] and the study of chemical reactions in the cold regime. [6,10,11] Theoretical calculations predict that at ultralow collision energies many chemical reactions are dominated by quantum effects such as tunneling and the occurrence of reactive resonances which are sensitively dependent on the details of the potential energy surface of the relevant system.…”

Section: Introductionmentioning

confidence: 99%

Molecules and Ions at Very Low Temperatures

Willitsch¹

2009

Chimia

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The generation and study of 'cold' gas-phase molecules characterised by very low translational temperatures T trans ≤ 1 K is an upcoming field of research in physical chemistry which has received considerable attention over the past years. A particular interesting form of cold molecules are ensembles of cold localised cations in ion traps which form ordered structures known as 'Coulomb crystals'. The present article reviews the experimental methods used for the generation of atomic and molecular Coulomb crystals and highlights recent experiments which take advantage of their intriguing properties in order to study chemical reactions at very low temperatures with single-particle sensitivity.

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Highly Coherent Spectroscopy of Ultracold Atoms and Molecules in Optical Lattices

Cited by 11 publications

References 74 publications

Formation of deeply bound ultracold Sr2molecules by photoassociation near the1S+3

Formation of deeply bound ultracold Sr2molecules by photoassociation near the1S+3

Entanglement of polar symmetric top molecules as candidate qubits

Molecules and Ions at Very Low Temperatures

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