ultra-long-range molecule engineering via rydberg-dressingultra-long-range molecule engineering via...
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Ultra-long-range molecule engineering via Rydberg-dressing
Jia Wang 1 and Robin Cote2
1Centre for Quantum and Optical Science, Swinburne University, Melbourne 3122, Australia2Department of Physics, University of Connecticut, Storrs, CT 06269, USA
In 2000, the three seminal papers launched a new era in Rydberg physics, predicting the blockademechanism [1], exploring Rydberg dressed interactions [2], and foreseeing trilobite-like molecules [3].Here, we explore how a new binding mechanism between ground state atoms, based on Rydberg-dressing, can lead to ultra-long-range molecules. We show that by using far-detuned lasers tocouple a small but adjustable Rydberg component to the ground state atom, localized long-rangepotential wells can be created that can support molecular bound levels (Fig. 1).
300 500 700 900 1100 1300 1500 1700R (a.u.)
-4-3-2-101
U(R
) (2p
MH
z)
18 21 24 27 30 33W (2p MHz)
0.51.01.52.02.5
E b(2p
MH
z)
80 90 100 110 120D (2p MHz)
0.51.01.52.02.5
W = 25 x 2p MHzD = 100 x 2p MHz
D = 100 x 2p MHzW = 25 x 2p MHz (a)
(b) (c)
0.5 1 2 4 8 16
R/RvdW
-2500
-2000
-1500
-1000
-500
0
500
1000
Vg
g/E
vdW
-40
-20
0
20
Vg
e/E
vdW
Ω
∆
Figure 1: Left: Sketch with dressing lasers. Right: (a) The dressed BO potential U (R) with lowestlevel (Eb ∼0.72 MHz) and |ψ|2. In (b), Eb vs. Ω for a specific ∆, and in (c), vs. ∆ for a specific Ω.
Figure 2: Two-color BO-PES (x and y in 1000 a0)..
We consider dressing with s, p, and d Ryd-berg states using different photon polarizations.We find that each type can sustain bound levels,with linear polarization leading to larger bind-ing energies. We also extend the treatment topolyatomic systems. Fig. 2 shows the BO-PESfor a two-color dressing scheme, with one laserdressing with 30p3/2, and another with 35p3/2.The potential exhibits two minima at R ≈ 1400a.u. (θ = 0 and π), and another at R ≈ 2000a.u. (θ ≈ π/2). The 3D-plot depicts the wells inspace based on the azimuthal symmetry of the system. This configuration could sustain a tetramerstate, with one atom in the center, one in the torus, and one in each sphere.
[1] D. Jaksch, J.I. Cirac, P. Zoller, S.L. Rolston, R. Cote,, and M.D. Lukin, PRL 85, 2208 (2000).
[2] L. Santos, G.V. Shlyapnikov, P. Zoller, and M. Lewenstein, PRL 85, 1791 (2000).
[3] C.H. Greene, A.S. Dickinson, and H.R. Sadeghpour, PRL 85, 2458 (2000).
This abstract was submitted to PQE-2019, the 49th Winter Colloquium on the Physics of Quantum Electronics.Submitted by Robin Cote on Wed Dec 5 13:45:10 CST 2018.See the program for placement of this presentation.