Quantum dynamics
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Deep Potential Molecular Dynamics: A Scalable Model with the Accuracy of Quantum Mechanics Open
We introduce a scheme for molecular simulations, the deep potential molecular dynamics (DPMD) method, based on a many-body potential and interatomic forces generated by a carefully crafted deep neural network trained with ab initio data. T…
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Adiabatic quantum computation Open
Adiabatic quantum computing (AQC) started as an approach to solving optimization problems, and has evolved into an important universal alternative to the standard circuit model of quantum computing, with deep connections to both classical …
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<i>Colloquium</i>: Non-Markovian dynamics in open quantum systems Open
The dynamical behavior of open quantum systems plays a key role in many applications of quantum mechanics, examples ranging from fundamental problems, such as the environment-induced decay of quantum coherence and relaxation in many-body s…
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Progress towards practical quantum variational algorithms Open
The preparation of quantum states using short quantum circuits is one of the most promising near-term applications of small quantum computers, especially if the circuit is short enough and the fidelity of gates high enough that it can be e…
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Ab Initio Nonadiabatic Quantum Molecular Dynamics Open
The Born-Oppenheimer approximation underlies much of chemical simulation and provides the framework defining the potential energy surfaces that are used for much of our pictorial understanding of chemical phenomena. However, this approxima…
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Quench dynamics and relaxation in isolated integrable quantum spin chains Open
We review the dynamics after quantum quenches in integrable quantum spin chains. We give a pedagogical introduction to relaxation in isolated quantum systems, and discuss the description of the steady state by (generalized) Gibbs ensembles…
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Dynamical quantum phase transitions: a review Open
Quantum theory provides an extensive framework for the description of the equilibrium properties of quantum matter. Yet experiments in quantum simulators have now opened up a route towards the generation of quantum states beyond this equil…
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SchNet: A continuous-filter convolutional neural network for modeling quantum interactions Open
Deep learning has the potential to revolutionize quantum chemistry as it is ideally suited to learn representations for structured data and speed up the exploration of chemical space. While convolutional neural networks have proven to be t…
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Thermalization and prethermalization in isolated quantum systems: a theoretical overview Open
The approach to thermal equilibrium, or thermalization, in isolated quantum\nsystems is among the most fundamental problems in statistical physics. Recent\ntheoretical studies have revealed that thermalization in isolated quantum\nsystems …
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Quantum Error Correction in Scrambling Dynamics and Measurement-Induced Phase Transition Open
We analyze the dynamics of entanglement entropy in a generic quantum many-body open system from the perspective of quantum information and error corrections. We introduce a random unitary circuit model with intermittent projective measurem…
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Quantum-classical computation of Schwinger model dynamics using quantum computers Open
We present a quantum-classical algorithm to study the dynamics of the\ntwo-spatial-site Schwinger model on IBM's quantum computers. Using rotational\nsymmetries, total charge, and parity, the number of qubits needed to perform\ncomputation…
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Strongly correlated quantum walks in optical lattices Open
Quantum walkers under a microscope Generations of physics students have been taught to think of one-dimensional random walks in terms of a drunken sailor taking random steps to the right or to the left. But that doesn't compare with the co…
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Quantum Generative Adversarial Networks for learning and loading random distributions Open
Quantum algorithms have the potential to outperform their classical counterparts in a variety of tasks. The realization of the advantage often requires the ability to load classical data efficiently into quantum states. However, the best k…
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Ultrafast many-body interferometry of impurities coupled to a Fermi sea Open
Sluggish turmoil in the Fermi sea The nonequilibrium dynamics of many-body quantum systems are tricky to study experimentally or theoretically. As an experimental setting, dilute atomic gases offer an advantage over electrons in metals. In…
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SchNet: A continuous-filter convolutional neural network for modeling\n quantum interactions Open
Deep learning has the potential to revolutionize quantum chemistry as it is\nideally suited to learn representations for structured data and speed up the\nexploration of chemical space. While convolutional neural networks have proven\nto b…
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Emergent SU(2) Dynamics and Perfect Quantum Many-Body Scars Open
Motivated by recent experimental observations of coherent many-body revivals in a constrained Rydberg atom chain, we construct a weak quasilocal deformation of the Rydberg-blockaded Hamiltonian, which makes the revivals virtually perfect. …
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Non-stationary coherent quantum many-body dynamics through dissipation Open
The assumption that quantum systems relax to a stationary state in the long-time limit underpins statistical physics and much of our intuitive understanding of scientific phenomena. For isolated systems this follows from the eigenstate the…
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Lieb-Robinson Bound and the Butterfly Effect in Quantum Field Theories Open
As experiments are increasingly able to probe the quantum dynamics of systems with many degrees of freedom, it is interesting to probe fundamental bounds on the dynamics of quantum information. We elaborate on the relationship between one …
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Neural-Network Approach to Dissipative Quantum Many-Body Dynamics Open
In experimentally realistic situations, quantum systems are never perfectly isolated and the coupling to their environment needs to be taken into account. Often, the effect of the environment can be well approximated by a Markovian master …
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Quantum control of a nanoparticle optically levitated in cryogenic free space Open
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Hybrid Quantum-Classical Approach to Quantum Optimal Control Open
A central challenge in quantum computing is to identify more computational problems for which utilization of quantum resources can offer significant speedup. Here, we propose a hybrid quantum-classical scheme to tackle the quantum optimal …
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Dynamics of one-dimensional quantum droplets Open
The structure and dynamics of one-dimensional binary Bose gases forming quantum droplets is studied by solving the corresponding amended Gross-Pitaevskii equation. Two physically different regimes are identified, corresponding to small dro…
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Digital Quantum Simulation of Spin Models with Circuit Quantum Electrodynamics Open
Systems of interacting quantum spins show a rich spectrum of quantum phases\nand display interesting many-body dynamics. Computing characteristics of even\nsmall systems on conventional computers poses significant challenges. A quantum\nsi…
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Recent advances in Wigner function approaches Open
The Wigner function was formulated in 1932 by Eugene Paul Wigner, at a time when quantum mechanics was in its infancy. In doing so, he brought phase space representations into quantum mechanics. However, its unique nature also made it very…
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Generalized Geometric Quantum Speed Limits Open
The attempt to gain a theoretical understanding of the concept of time in quantum mechanics has triggered significant progress towards the search for faster and more efficient quantum technologies. One of such advances consists in the inte…
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Quantum Advantage in the Charging Process of Sachdev-Ye-Kitaev Batteries Open
The exactly solvable Sachdev-Ye-Kitaev (SYK) model has recently received considerable attention in both condensed matter and high energy physics because it describes quantum matter without quasiparticles, while being at the same time the h…
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Nonequilibrium quantum dynamics and transport: from integrability to many-body localization Open
We review the non-equilibrium dynamics of many-body quantum systems after a\nquantum quench with spatial inhomogeneities, either in the Hamiltonian or in\nthe initial state. We focus on integrable and many-body localized systems that\nfail…
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Variational Quantum Monte Carlo Method with a Neural-Network Ansatz for Open Quantum Systems Open
The possibility to simulate the properties of many-body open quantum systems with a large number of degrees of freedom (d.o.f.) is the premise to the solution of several outstanding problems in quantum science and quantum information. The …
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Nonperturbative Treatment of non-Markovian Dynamics of Open Quantum Systems Open
We identify the conditions that guarantee equivalence of the reduced dynamics of an open quantum system (OQS) for two different types of environments-one a continuous bosonic environment leading to a unitary system-environment evolution an…
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Bifurcation-based adiabatic quantum computation with a nonlinear oscillator network Open
The dynamics of nonlinear systems qualitatively change depending on their parameters, which is called bifurcation. A quantum-mechanical nonlinear oscillator can yield a quantum superposition of two oscillation states, known as a Schrödinge…