Spin relaxation of optically trapped atoms by light scattering

Cline, R. A.; Miller, Joseph D.; Matthews, M. R.; Heinzen, D. J.

doi:10.1364/ol.19.000207

Cited by 81 publications

(92 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since no energy or angular momentum are exchanged between the photon and the ion internal degrees of freedom, no information about the qubit state is carried away by a Rayleigh scattered photon. Rayleigh scattering, therefore, does not necessarily lead to decoherence [23,24,25]. This was experimentally shown in [25] where, when of equal rate from both qubit levels, off-resonance Rayleigh scattering of photons did not affect the coherence of a hyperfine superposition.…”

Section: A Ion-qubit Levels and Transitionsmentioning

confidence: 99%

Errors in trapped-ion quantum gates due to spontaneous photon scattering

Ozeri¹,

Itano²,

Blakestad³

et al. 2007

Phys. Rev. A

167

225

View full text Add to dashboard Cite

We analyze the error in trapped-ion, hyperfine qubit, quantum gates due to spontaneous scattering of photons from the gate laser beams. We investigate single-qubit rotations that are based on stimulated Raman transitions and two-qubit entangling phase-gates that are based on spin-dependent optical dipole forces. This error is compared between different ion species currently being investigated as possible quantum information carriers. For both gate types we show that with attainable laser powers the scattering error can be reduced to below current estimates of the fault-tolerance error threshold.

show abstract

Section: A Ion-qubit Levels and Transitionsmentioning

confidence: 99%

Errors in trapped-ion quantum gates due to spontaneous photon scattering

Ozeri¹,

Itano²,

Blakestad³

et al. 2007

Phys. Rev. A

167

225

View full text Add to dashboard Cite

show abstract

“…The transition amplitudes a (J') are obtained by summing over all possible intermediate states | F ′ , m ′ of the relevant 6 P J ′ manifold [22]. For Rayleigh scattering processes, which do not change the hyperfine state (F, M = F ′′ , M ′′ ), the amplitudes add up, a (3/2) = 2a (1/2) .…”

Section: B Origins Of Irreversible Dephasingmentioning

confidence: 99%

“…Note that the experiments of Refs. [22,23] were only sensitive to changes of the hyperfine F -state, since the atoms were in a mixture of m F -sublevels. However, the theoretical treatment above predicts similarly long relaxation times for any particular m F -sublevel, which is consistent with our observations.…”

Section: B Origins Of Irreversible Dephasingmentioning

confidence: 99%

Analysis of dephasing mechanisms in a standing-wave dipole trap

et al. 2005

View full text Add to dashboard Cite

We study in detail the mechanisms causing dephasing of hyperfine coherences of cesium atoms confined by a far off-resonant standing wave optical dipole trap [S. Kuhr et al., Phys. Rev. Lett. 91, 213002 (2003)]. Using Ramsey spectroscopy and spin echo techniques, we measure the reversible and irreversible dephasing times of the ground state coherences. We present an analytical model to interpret the experimental data and identify the homogeneous and inhomogeneous dephasing mechanisms. Our scheme to prepare and detect the atomic hyperfine state is applied at the level of a single atom as well as for ensembles of up to 50 atoms.

show abstract

“…Because of the tight trap confinement, the change in motional state primarily consists of events where a single phonon is added or subtracted, in analogy with heating of ions in the LambDicke limit [23]. The transition rates can generally be obtained by second-order perturbation theory [24,25]. For a two-level system, we find a jump rate…”

mentioning

confidence: 88%

Trapping and Manipulation of Isolated Atoms Using Nanoscale Plasmonic Structures

et al. 2009

View full text Add to dashboard Cite

We propose and analyze a scheme to interface individual neutral atoms with nanoscale solidstate systems. The interface is enabled by optically trapping the atom via the strong near-field generated by a sharp metallic nanotip. We show that under realistic conditions, a neutral atom can be trapped with position uncertainties of just a few nanometers, and within tens of nanometers of other surfaces. Simultaneously, the guided surface plasmon modes of the nanotip allow the atom to be optically manipulated, or for fluorescence photons to be collected, with very high efficiency. Finally, we analyze the surface forces and heating and decoherence rates acting on the trapped atom.Much interest has recently been directed towards hybrid systems that integrate isolated atomic systems with solid-state devices [1,2,3,4]. These efforts are aimed at combining the best of both worlds, namely the excellent coherence and control associated with isolated atoms, ions and molecules, with the miniaturization and integrability associated with solid-state devices. A key ingredient for such integrated devices is the ability to trap, coherently manipulate, and measure individual cold atoms at distances below ∼100 nm from solid-state surfaces.In this Letter, we describe a technique that allows a single atom to be optically trapped within a nanoscale region above the surface of a sharp, conducting nanotip. Under illumination with a single blue-detuned laser beam, the nanotip behaves as a "lightning rod" that generates very large field gradients and an intensity minimum that can be used to tightly trap an atom. Simultaneously, the nanotip supports a set of tightly guided surface plasmon modes to which the trapped atom can very efficiently couple. Under realistic conditions, the strong coupling regime can be reached, where the emission rate into the guided surface plasmons of the nanotip far exceeds that into all other channels. It has been shown that this regime enables efficient fluorescence collection and optical manipulation at a single-photon level [5,6,7]. Finally, we analyze in detail surface effects and photon scattering and their effects on trap lifetimes and atomic coherence times.The trapping technique described in this Letter might enable the realization of several unique applications. For example, the nanotrap can be used for deterministic positioning of single atoms near micro-photonic and nano-photonic structures, such as micro-toroidal resonators [8,9] and photonic crystal cavities [10] (see Fig. 1a). Alternatively, the trap can be used for realization of hybrid quantum systems consisting of single atoms or molecules in the immediate proximity of charged or magnetized solid-state quantum systems, to enable direct strong coupling [11]. Finally, a trapped atom might be used as a novel scanning probe for sensing magnetic or electric fields with nanoscale resolution. We note that forces associated with metallic systems are being explored, in the context of optical tweezers for dielectric objects on surfaces [12] and electro-optica...

show abstract

Spin relaxation of optically trapped atoms by light scattering

Cited by 81 publications

References 10 publications

Errors in trapped-ion quantum gates due to spontaneous photon scattering

Errors in trapped-ion quantum gates due to spontaneous photon scattering

Analysis of dephasing mechanisms in a standing-wave dipole trap

Trapping and Manipulation of Isolated Atoms Using Nanoscale Plasmonic Structures

Contact Info

Product

Resources

About