Quantum simulation articles within Nature Physics

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  • Review Article |

    The study of quantum systems in a programmable and controllable fashion is one of the aims of both quantum simulation and computing. This Review covers the prospects and opportunities that ultracold molecules offer in these fields.

    • Simon L. Cornish
    • , Michael R. Tarbutt
    •  & Kaden R. A. Hazzard

  • News & Views |

    The properties of quantum matter arise from the combined effects of dimensionality, interactions and quantum statistics. An experiment now studies what happens to ultracold bosons when the dimensionality of the system changes continuously between one and two dimensions.

    • Jérôme Beugnon

  • Perspective |

    Quantum computers promise to efficiently predict the structure and behaviour of molecules. This Perspective explores how this could overcome existing challenges in computational drug discovery.

    • Raffaele Santagati
    • , Alan Aspuru-Guzik
    •  & Clemens Utschig-Utschig

  • News & Views |

    Quantum simulators can provide new insights into the complicated dynamics of quantum many-body systems far from equilibrium. A recent experiment reveals that underlying symmetries dictate the nature of universal scaling dynamics.

    • Maximilian Prüfer

  • Article |

    Raman sideband cooling is a method used to prepare atoms and ions in their vibrational ground state. This technique has now been extended to molecules trapped in optical tweezer arrays.

    • Yukai Lu
    • , Samuel J. Li
    •  & Lawrence W. Cheuk

  • News & Views |

    Quasicrystals are ordered but not periodic, which makes them fascinating objects at the interface between order and disorder. Experiments with ultracold atoms zoom in on this interface by driving a quasicrystal and exploring its fractal properties.

    • Julian Léonard

  • Article
    | Open Access

    Phases of matter can host different transport behaviours, ranging from diffusion to localization. Anomalous transport has now been observed in an interacting Bose gas in a one-dimensional lattice subject to a pulsed incommensurate potential.

    • Toshihiko Shimasaki
    • , Max Prichard
    •  & David M. Weld

  • Article
    | Open Access

    External driving of qubits can exploit their nonlinearity to generate different forms of interqubit interactions, broadening the capabilities of the platform.

    • Long B. Nguyen
    • , Yosep Kim
    •  & Irfan Siddiqi

  • Article |

    It has been suggested that Gaussian boson sampling may provide a quantum computational advantage for calculating the vibronic spectra of molecules. Now, an equally efficient classical algorithm has been identified.

    • Changhun Oh
    • , Youngrong Lim
    •  & Liang Jiang

  • Article |

    An error detecting code running on a trapped-ion quantum computer protects expressive circuits of eight logical qubits with a high-fidelity and partially fault-tolerant implementation of a universal gate set.

    • Chris N. Self
    • , Marcello Benedetti
    •  & David Amaro

  • Article |

    The Haldane model is a paradigmatic example of topological behaviour but has not previously been implemented in condensed-matter experiments. Now a moiré bilayer is shown to realize this model with the accompanying quantized transport response.

    • Wenjin Zhao
    • , Kaifei Kang
    •  & Kin Fai Mak

  • News & Views |

    The simulation of open quantum many-body systems is one of the hardest tasks in computational physics. Now, quantum computers are close to answering crucial questions for such systems in a regime that classical computers cannot reach.

    • Hendrik Weimer

  • Article |

    Quantum computers may help to solve classically intractable problems, such as simulating non-equilibrium dissipative quantum systems. The critical dynamics of a dissipative quantum model has now been probed on a trapped-ion quantum computer.

    • Eli Chertkov
    • , Zihan Cheng
    •  & Michael Foss-Feig

  • Article |

    The high inelastic loss rate in gases of bosonic molecules has so far hindered the stabilization needed to reach quantum degeneracy. Now, an experiment using microwave shielding demonstrates a large reduction of losses for bosonic dipolar molecules.

    • Niccolò Bigagli
    • , Claire Warner
    •  & Sebastian Will

  • Article |

    Quantum computers are believed to exponentially outperform classical computers at some tasks, but it is hard to make guarantees about the limits of classical computers. It has now been proven that classical computers cannot efficiently simulate most quantum circuits.

    • Ramis Movassagh

  • News & Views |

    Exploring the combined effects of many-body interactions and topology is experimentally challenging. Now, researchers have shown that strong interparticle interactions force ultracold atoms to shift as a whole or one by one, or break quantization in a topological pump.

    • Yongguan Ke
    •  & Chaohong Lee

  • Article |

    Some many-body problems are challenging to solve in real space, but have a convenient Fock-space representation. A superconducting qubit experiment now demonstrates the benefits of this approach for the study of quantum dynamics and criticality.

    • Yunyan Yao
    • , Liang Xiang
    •  & Qiujiang Guo

  • Article |

    Generation of entanglement in quantum computers stems from the native interactions between qubits, which are usually restricted to the pairwise limit. A method to control three- and four-body interactions has now been demonstrated with trapped ions.

    • Or Katz
    • , Lei Feng
    •  & Marko Cetina

  • News & Views |

    The interplay of quantum measurements and local interactions in many-body systems can lead to new out-of-equilibrium phase transitions. An experiment has now shown that quantum simulators can meet the challenge of detecting them.

    • Alessandro Romito

  • Article |

    Some driven systems sustain non-equilibrium phases in which phase transitions occur without symmetry breaking. The use of a laser-cooled atomic cloud confined in a pencil beam now allows the demonstration of such a system.

    • Giovanni Ferioli
    • , Antoine Glicenstein
    •  & Antoine Browaeys

  • Article |

    Engineering the frequency spectrum of systems of multiple quantum emitters is the key for many quantum technologies. A cavity quantum electrodynamics experiment now demonstrates the real-time frequency modulation of cavity-protected polaritons.

    • Mohamed Baghdad
    • , Pierre-Antoine Bourdel
    •  & Romain Long

  • Article
    | Open Access

    Random spin models play a key role in our understanding of disorder and complex many-body systems. Two all-to-all interacting, disordered models have now been realized using a cavity quantum electrodynamics platform.

    • Nick Sauerwein
    • , Francesca Orsi
    •  & Jean-Philippe Brantut

  • News & Views |

    A quantum engineering technique powered by disorder offers access to local correlation functions down to single-site resolution in nuclear spin ensembles, allowing the study of both spin and energy hydrodynamics.

    • Yaoming Chu
    •  & Jianming Cai

  • Article |

    Probing strongly interacting quantum systems with high spatial resolution can be challenging. An experiment now uses disorder in nuclear spin chains as a local probe to investigate spin and energy hydrodynamics.

    • Pai Peng
    • , Bingtian Ye
    •  & Paola Cappellaro

  • Research Briefing |

    It’s a long-standing theoretical prediction that mutual information in locally interacting, many-body quantum systems follows an area law. Using cold-atom quantum-field simulators on an atom chip to measure the scaling of von Neumann entropy and mutual information, that prediction is now proved true.

  • Article |

    The scaling of entanglement entropy and mutual information is key for the understanding of correlated states of matter. An experiment now reports the measurement of von Neumann entropy and mutual information in a quantum field simulator.

    • Mohammadamin Tajik
    • , Ivan Kukuljan
    •  & Jörg Schmiedmayer

  • Research Briefing |

    Controlling the spatial distribution of optically active spin defects in solids is a long-standing goal in the quantum sensing and simulation communities. Measurements of the many-body noise generated by the spins were used to verify that a highly coherent and strongly interacting quantum spin system was confined to two dimensions within a diamond substrate.

  • Article
    | Open Access

    Solid-state systems are established candidates to study models of many-body physics but have limited control and readout capabilities. Ensembles of defects in diamond may provide a solution for studying dipolar systems.

    • E. J. Davis
    • , B. Ye
    •  & N. Y. Yao

  • News & Views |

    Boson sampling is a benchmark problem for photonic quantum computers and a potential avenue towards quantum advantage. A scheme to realize a boson sampler based on the vibrational modes in a chain of trapped ions instead has now been demonstrated.

    • Norbert M. Linke

  • Letter |

    Plasmonics allows precise engineering of light–matter interactions and is the driver behind many optical devices. The local observation of a plasmonic quantum wave packet is a step towards bringing these functionalities to the quantum regime.

    • Sebastian Pres
    • , Bernhard Huber
    •  & Tobias Brixner

  • Letter |

    The presence of small thermal regions in a many-body localized system could lead to its delocalization. An experiment with cold atoms now monitors the delocalization induced by the coupling of a many-body localized region with a thermal bath.

    • Julian Léonard
    • , Sooshin Kim
    •  & Markus Greiner

  • Letter
    | Open Access

    Photonic waveguides with appropriately engineered interactions allow the experimental realization of non-Abelian quantum holonomies of the symmetry group U(3), which is known from the strong nuclear force.

    • Vera Neef
    • , Julien Pinske
    •  & Alexander Szameit

  • Research Briefing |

    An ultracold spinor Bose gas was used to achieve advanced experimental control and detection of an easy-plane ferromagnet, allowing observation of the system as it approaches equilibrium. The measurements revealed twofold superfluidity in the spin and density degrees of freedom with very different critical speeds.

  • Article |

    Many-body quantum systems that escape thermalization are promising candidates for quantum information applications. A weak-ergodicity-breaking mechanism—quantum scarring—has now been observed with superconducting qubits in unconstrained models.

    • Pengfei Zhang
    • , Hang Dong
    •  & Ying-Cheng Lai

  • News & Views |

    A quantum rotor periodically kicked stops absorbing energy after a certain time and enters into a localized regime. Two experiments with cold atoms have now shown how many-body interactions can suppress dynamical localization.

    • Jakub Zakrzewski

  • Letter |

    The quantum kicked rotor is a paradigmatic non-interacting model of quantum chaos and ergodicity breaking. An experiment with a kicked Bose–Einstein condensate now explores the influence of many-body interactions on the onset of quantum chaos.

    • Jun Hui See Toh
    • , Katherine C. McCormick
    •  & Subhadeep Gupta

  • Article
    | Open Access

    A Mott insulator forms when strong interactions between particles cause them to become localized. A cold atom simulator has now been used to realize a selective Mott insulator in which atoms are localized or propagating depending on their spin state.

    • D. Tusi
    • , L. Franchi
    •  & L. Fallani

  • News & Views |

    Using a quantum annealer to simulate the dynamics of phase transitions shows that superconducting quantum devices can coherently evolve systems of thousands of individual elements. This is an important step toward quantum simulation and optimization.

    • David Bernal Neira

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