Dynamical phases in a one-dimensional chain of heterospecies Rydberg atoms with next-nearest-neighbor interactions

Qian, Jing; Zhang, Lu; Zhai, Jingjing; Zhang, Weiping

doi:10.1103/physreva.92.063407

Cited by 15 publications

(12 citation statements)

References 40 publications

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“…The reason for this is that they allow the state measurements to possess cross entanglement of two different atomic species located in the same trap, or nearby traps. The feasibility of this scheme was discussed in [16][17][18], and experimental research relevant to heteronuclear atom qubits was reported in Rb isotopes [19]. Since the heteronuclear atom qubits need the prepreparation of ultracold alkali metal dimers, only several combinations of them enable keeping stable under two-body molecular collisions [20].…”

Section: Introductionmentioning

confidence: 99%

Inverted-ladder-type optical excitation of potassium Rydberg states with hot and cold ensembles

et al. 2020

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We present experimental results on the sub-Doppler Rydberg spectroscopy of potassium in a hot cell and cold atoms, using two counterpropagating laser beams of 405 and 980 nm as an inverted ladder-type excitation configuration (4S 1/2-5P 3/2-nS 1/2 and nD 3/2,5/2). Such an inverted ladder-type scheme is predicted to be without the sub-Doppler electromagnetically induced transparency feature in a thermal ensemble under the weak-probe approximation. Instead, we utilize a strong probe field and successfully observe a transparency window with a width narrower than 50 MHz. Our all-order numerical simulation is in satisfactory agreement with the experimental results. This narrow linewidth allows us to measure the energy levels of the Rydberg levels from n = 20-70 with improved accuracy. The deduced ionization energy agrees with the previous measurements. Furthermore, the two-photon Rydberg excitation scheme was applied to the cold ensembles to study the ground-state atoms population decrease in the magneto-optical trap for various Rydberg states. Our experimental observations suggested two distinct regimes of the trap losses under different probe detuning conditions. While the far off-resonance case (p 0) can be described by the picture of dressed atom, the on-resonance case (p ∼ 0) reveals more interesting results. The higher Rydberg states suffer larger trap loss. Besides, even with similar level energies, the excitation to nD states result in faster escape of the ground-state atom from trap than nearby nS states.

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Section: Introductionmentioning

confidence: 99%

Inverted-ladder-type optical excitation of potassium Rydberg states with hot and cold ensembles

et al. 2020

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“…Interestingly, a system of coupled resonators in the photon-blockade regime arranged according a lattice geometry can be mapped into an effective spin model [21,26,27]. This class of systems can be realized nowadays using different experimental platforms, such as superconducting quantum simulators [28] or Rydberg atoms [29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Dynamical properties of dissipative XYZ Heisenberg lattices

Rota¹,

Minganti²,

Biella³

et al. 2018

New J. Phys.

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We study dynamical properties of dissipative XYZ Heisenberg lattices where anisotropic spin-spin coupling competes with local incoherent spin flip processes. In particular, we explore a region of the parameter space where dissipative magnetic phase transitions for the steady state have been recently predicted by mean-field theories and exact numerical methods. We investigate the asymptotic decay rate towards the steady state both in 1D (up to the thermodynamical limit) and in finite-size 2D lattices, showing that critical dynamics does not occur in 1D, but it can emerge in 2D. We also analyze the behavior of individual homodyne quantum trajectories, which reveal the nature of the transition.

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“…where we have inserted the density matrix expansion given in Eq. (5). If we allow t → ∞ so we study the two-time correlator in the steady state, then Eq.…”

Section: Quantum Phase Diagrammentioning

confidence: 99%

“…Although not as well understood as their equilibrium counterparts, non-equilibrium phenomena are in fact rather prevalent, as any experiment has some form of interaction with an environment, which will induce dissipative processes. Whereas these processes could be viewed as a nuisance, recent studies have shown that the interplay between an external drive and dissipation can produce exotic non-equilibrium phases such as spin density waves (SDW), antiferromagnetic phases (AFM), persistent long-time oscillations (OSC) and phase bistabilities within spin−1/2 systems [1][2][3][4][5][6] and higher spin systems [7]. Therefore, understanding the long-time steady state phases that can occur in open quantum systems is an intense area of current research.…”

Section: Introductionmentioning

confidence: 99%

Steady states of a driven dissipative dipolar XXZ chain

Parmee

Cooper

2020

J. Phys. B: At. Mol. Opt. Phys.

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We study theoretically a driven dissipative one-dimensional XXZ spin−1/2 chain with dipole coupling and a tunable strength of the Ising and XY interaction. Within a mean-field approximation, we find a rich phase diagram with uniform, spin density wave, antiferromagnetic and oscillatory phases, as well as regions of phase bistability. We study the phase diagram of small quantum systems using exact diagonalisation, and compare the results to the mean-field theory. We find that while expectation values only capture the uniform phases of the mean-field theory, fluctuations about these expectation values give signatures of spatially non-uniform phases and bistabilities. We find these signatures for all ratios of the Ising to XY interaction, showing that they appear to be general features of spin−1/2 systems. arXiv:1906.10953v1 [cond-mat.quant-gas]

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Dynamical phases in a one-dimensional chain of heterospecies Rydberg atoms with next-nearest-neighbor interactions

Cited by 15 publications

References 40 publications

Inverted-ladder-type optical excitation of potassium Rydberg states with hot and cold ensembles

Inverted-ladder-type optical excitation of potassium Rydberg states with hot and cold ensembles

Dynamical properties of dissipative XYZ Heisenberg lattices

Steady states of a driven dissipative dipolar XXZ chain

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