Vibrational Dressing in Kinetically Constrained Rydberg Spin Systems

Mazza, Paolo P.; Schmidt, Richard; Lesanovsky, Igor

doi:10.1103/physrevlett.125.033602

Cited by 27 publications

(22 citation statements)

References 59 publications

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“…In terms of experimental platforms a significant role is currently being played by Rydberg gases, in which atoms are excited to high-lying and strongly interacting states. This allows to implement effective quantum spin models with highly controllable state-dependent interactions that pave the way towards realizing a host of kinetic constraints [17][18][19][20][21][22][23][24][25][26][27][28].…”

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confidence: 99%

Emergent Bloch Oscillations in a Kinetically Constrained Rydberg Spin Lattice

2021

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We explore the relaxation dynamics of elementary spin clusters in a kinetically constrained spin system. Inspired by experiments with Rydberg lattice gases, we focus on the situation in which an excited spin leads to a "facilitated" excitation of a neighboring spin. We show that even weak interactions that extend beyond nearest neighbors can have a dramatic impact on the relaxation behavior: they generate a linear potential, which under certain conditions leads to the onset of Bloch oscillations of spin clusters. These hinder the expansion of a cluster and more generally the relaxation of many-body states towards equilibrium. This shows that non-ergodic behavior in kinetically constrained systems may occur as a consequence of the interplay between reduced connectivity of many-body states and weak interparticle interactions. We furthermore show that the emergent Bloch oscillations identified here can be detected in experiment through measurements of the Rydberg atom density, and discuss how spin-orbit coupling between internal and external degrees of freedom of spin clusters can be used to control their relaxation behavior.

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confidence: 99%

Emergent Bloch Oscillations in a Kinetically Constrained Rydberg Spin Lattice

2021

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“…RAB plays roles in the study of motional effects [22,23], dissipative dynamics [24][25][26], periodically driving [27], and quantum computation [28,29]. RAB was also studied in detection of structural phase transitions [30], Rydberg spin system [31], cold atom ensemble [32], as well as in strongly interacting Rydberg atom experiment [33].…”

Section: Introductionmentioning

confidence: 99%

“…In Fig. 1(b), we show regimes to realizing Rydberg blockade [2-4], conventional RAB with simultaneous driving [20,21,[23][24][25][26][27][28][30][31][32] as well as sequential-drivingbased RAB [29], where the excitation conditions can be * weibin.Li@nottingham.ac.uk controlled by laser detuning. When using DD interactions, the density-density as well as spin flip-flop interactions co-exist [34,35], leading to complicated many-body dynamics [36].…”

Section: Introductionmentioning

confidence: 99%

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Dipole-dipole-interaction–driven antiblockade of two Rydberg atoms

2021

Phys. Rev. A

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Resonant laser excitation of multiple Rydberg atoms are prohibited, leading to Rydberg blockade, when the long-range van der Waals interactions are stronger than the laser-atom coupling. Rydberg blockade can be violated, i.e. simultaneous excitation of more than one Rydberg atoms, by off-resonant laser excitation, causing an excitation antiblockade. Rydberg antiblockade gives rise to strongly correlated many-body dynamics and spin-orbit coupling, and also finds quantum computation applications. Instead of commonly used van der Waals interactions, we investigate antiblockade dynamics of two Rydberg atoms interacting via dipole-dipole exchange interactions. We study typical situations in current Rydberg atoms experiments, where different types of dipole-dipole interactions can be achieved by varying Rydberg state couplings. Effective Hamiltonian governing underlying antiblockade dynamics is derived. We illustrate that geometric gates can be realized with the Rydberg antiblockade which is robust against decay of Rydberg states. Our study may stimulate new experimental and theoretical exploration of quantum optics and strongly interacting many-body dynamics with Rydberg antiblockade driven by dipole-dipole interactions.

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“…give rise to non-trivial many-body phenomena, such as a threebody anti-blockade effect. The novel capabilities we unveil in our work show that trapped Rydberg ions are a powerful platform for quantum simulation, allowing for the study of exotic kinetically constrained dynamics [41,42], long-lived quantum information storage [43] and correlated quantum states of matter [44][45][46][47][48][49][50][51].…”

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Long-Range Multibody Interactions and Three-Body Antiblockade in a Trapped Rydberg Ion Chain

et al. 2020

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Trapped Rydberg ions represent a flexible platform for quantum simulation and information processing which combines a high degree of control over electronic and vibrational degrees of freedom. The possibility to individually excite ions to high-lying Rydberg levels provides a system where strong interactions between pairs of excited ions can be engineered and tuned via external laser fields. We show that the coupling between Rydberg pair interactions and collective motional modes gives rise to effective long-range and multi-body interactions, consisting of two, three, and four-body terms. Their shape, strength, and range can be controlled via the ion trap parameters and strongly depends on both the equilibrium configuration and vibrational modes of the ion crystal. By focusing on an experimentally feasible quasi one-dimensional setup of 88 Sr + Rydberg ions, we demonstrate that multi-body interactions are enhanced by the emergence of soft modes associated, e.g., with a structural phase transition. This has a striking impact on many-body electronic states and results, for example, in a three-body anti-blockade effect which can be employed as a sensitive probe to detect structural phase transitions in Rydberg ion chains. Our study unveils the possibilities offered by trapped Rydberg ions for studying exotic phases of matter and quantum dynamics driven by enhanced multi-body interactions.

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Vibrational Dressing in Kinetically Constrained Rydberg Spin Systems

Cited by 27 publications

References 59 publications

Emergent Bloch Oscillations in a Kinetically Constrained Rydberg Spin Lattice

Emergent Bloch Oscillations in a Kinetically Constrained Rydberg Spin Lattice

Dipole-dipole-interaction–driven antiblockade of two Rydberg atoms

Long-Range Multibody Interactions and Three-Body Antiblockade in a Trapped Rydberg Ion Chain

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