Particle statistics and lossy dynamics of ultracold atoms in optical lattices

Malo, Jorge Yago; Nieuwenburg, Evert P. L. van; Fischer, Mark H.; Daley, Andrew J.

doi:10.1103/physreva.97.053614

Cited by 7 publications

(3 citation statements)

References 49 publications

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“…Furthermore, beyond these consistent cooling and state-preparation protocols presented here, the inclusion of dissipative dynamics can also give raise to fundamentally new phenomena. In particular, dissipation can alter the behaviour of known phases of matter drastically or it can be used to infer or probe some inherent properties of the system as particle statistics [287]. It can even generate new phases, with some early examples in [284,288,289].…”

Section: Open Systems: Reservoir Engineeringmentioning

confidence: 99%

Atomic Quantum Technologies for Quantum Matter and Fundamental Physics Applications

Yago Malo,

Lepori,

Gentini

et al. 2024

Technologies

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Physics is living an era of unprecedented cross-fertilization among the different areas of science. In this perspective review, we discuss the manifold impact that state-of-the-art cold and ultracold-atomic platforms can have in fundamental and applied science through the development of platforms for quantum simulation, computation, metrology and sensing. We illustrate how the engineering of table-top experiments with atom technologies is engendering applications to understand problems in condensed matter and fundamental physics, cosmology and astrophysics, unveil foundational aspects of quantum mechanics, and advance quantum chemistry and the emerging field of quantum biology. In this journey, we take the perspective of two main approaches, i.e., creating quantum analogues and building quantum simulators, highlighting that independently of the ultimate goal of a universal quantum computer to be met, the remarkable transformative effects of these achievements remain unchanged. We wish to convey three main messages. First, this atom-based quantum technology enterprise is signing a new era in the way quantum technologies are used for fundamental science, even beyond the advancement of knowledge, which is characterised by truly cross-disciplinary research, extended interplay between theoretical and experimental thinking, and intersectoral approach. Second, quantum many-body physics is unavoidably taking center stage in frontier’s science. Third, quantum science and technology progress will have capillary impact on society, meaning this effect is not confined to isolated or highly specialized areas of knowledge, but is expected to reach and have a pervasive influence on a broad range of society aspects: while this happens, the adoption of a responsible research and innovation approach to quantum technologies is mandatory, to accompany citizens in building awareness and future scaffolding. Following on all the above reflections, this perspective review is thus aimed at scientists active or interested in interdisciplinary research, providing the reader with an overview of the current status of these wide fields of research where cold and ultracold-atomic platforms play a vital role in their description and simulation.

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Section: Open Systems: Reservoir Engineeringmentioning

confidence: 99%

Atomic Quantum Technologies for Quantum Matter and Fundamental Physics Applications

Yago Malo,

Lepori,

Gentini

et al. 2024

Technologies

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“…Note, however, that there is still a significant number of particles left in the system at this time. Finally, we compare the evolution of the OSEE with the entanglement entropy obtained via a quantum trajectory method [2,25] as shown with dashed lines in figure 5. For comparison, we calculated the entanglement entropy using a logarithm with base equal to the local Hilbert space dimension for both the quantum trajectory method (d = 2) and the density matrix evolution (d = 4).…”

Section: Evolution Of Entanglement Entropymentioning

confidence: 99%

Dynamics of many-body localization in the presence of particle loss

Nieuwenburg¹,

Malo²,

Daley³

et al. 2017

Quantum Sci. Technol.

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Abstract. At long times, residual couplings to the environment become relevant even in the most isolated experiments, a crucial difficulty for the study of fundamental aspects of many-body dynamics. A particular example is many-body localization in a cold-atom setting, where incoherent photon scattering introduces both dephasing and particle loss. Whereas dephasing has been studied in detail and is known to destroy localization already on the level of non-interacting particles, the effect of particle loss is less well understood. A difficulty arises due to the 'non-local' nature of the loss process, complicating standard numerical tools using matrix product decomposition. Utilizing symmetries of the Lindbladian dynamics, we investigate the particle loss on both the dynamics of observables, as well as the structure of the density matrix and the individual states. We find that particle loss in the presence of interactions leads to dissipation and a strong suppression of the (operator space) entanglement entropy. Our approach allows for the study of the interplay of dephasing and loss for pure and mixed initial states to long times, which is important for future experiments using controlled coupling of the environment.

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“…The same is also true for the loss of JW fermions at the center. However, the full dynamics are very different for the two cases [80]. For the boson loss, hĈ 2 i is conserved, not the occupation of odd modes, as the string in Eq.…”

mentioning

confidence: 97%

Long-Range Coherence and Multiple Steady States in a Lossy Qubit Array

Dutta

Cooper

2020

Phys. Rev. Lett.

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We show that a simple experimental setting of a locally pumped and lossy array of two-level quantum systems can stabilize states with strong long-range coherence. Indeed, by explicit analytic construction, we show there is an extensive set of steady-state density operators, from minimally to maximally entangled, despite this being an interacting open many-body problem. Such nonequilibrium steady states arise from a hidden symmetry that stabilizes Bell pairs over arbitrarily long distances, with unique experimental signatures. We demonstrate a protocol by which one can selectively prepare these states using dissipation. Our findings are accessible in present-day experiments.

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Particle statistics and lossy dynamics of ultracold atoms in optical lattices

Cited by 7 publications

References 49 publications

Atomic Quantum Technologies for Quantum Matter and Fundamental Physics Applications

Atomic Quantum Technologies for Quantum Matter and Fundamental Physics Applications

Dynamics of many-body localization in the presence of particle loss

Long-Range Coherence and Multiple Steady States in a Lossy Qubit Array

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