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Fast thermal state preparation beyond native interactions
Alexander van Lomwel, Paul M. Schindler, Modesto Orozco-Ruiz +3
While questions on quantum simulation of ground state physics are mostly focussed on the realization of effective interactions, most work on quantum simulation of thermal physics e…
Walsh-Floquet Theory of Periodic Kick Drives
James Walkling, Marin Bukov
Periodic kick drives are ubiquitous in digital quantum control, computation, and simulation, and are instrumental in studies of chaos and thermalization for their efficient represe…
Geometric Floquet theory
Paul M. Schindler, Marin Bukov
We derive Floquet theory from quantum geometry. We identify quasienergy folding as a consequence of a broken gauge group of the adiabatic gauge potential .…
Sensing with discrete time crystals
Leo Joon Il Moon, Paul M. Schindler, Ryan J. Smith +4
Prethermal discrete time crystals (PDTCs) are a nonequilibrium state of matter characterized by long-range spatiotemporal order, and exhibiting a subharmonic response stabilized by…
Floquet-engineered Emergent Massive Nambu-Goldstone Modes
Yang Hou, Zhanpeng Fu, Roderich Moessner +2
We present a general framework to implement massive Nambu-Goldstone quasi-particles in driven many-body systems. The underlying mechanism leverages an explicit Lie group structure…
Learning effective Hamiltonians for adaptive time-evolution quantum algorithms
Hongzheng Zhao, Ao Chen, Shu-Wei Liu +3
Digital quantum simulation of many-body dynamics relies on Trotterization to decompose the target time evolution into elementary quantum gates operating at a fixed equidistant time…
Experimental observation of a time rondeau crystal: Temporal Disorder in Spatiotemporal Order
Leo Joon Il Moon, Paul Manuel Schindler, Yizhe Sun +6
Our understanding of phases of matter relies on symmetry breaking, one example being water ice whose crystalline structure breaks the continuous translation symmetry of space. Rece…
Engineering Hierarchical Symmetries
Zhanpeng Fu, Roderich Moessner, Hongzheng Zhao +1
The capacity to custom tailor the properties of quantum matter and materials is a central requirement for enlarging their range of possible functionalities. A particularly promisin…
Nanoscale engineering and dynamical stabilization of mesoscopic spin textures
Kieren Harkins, Christoph Fleckenstein, Noella D'Souza +16
Thermalization phenomena, while ubiquitous in quantum systems, have traditionally been viewed as obstacles to be mitigated. In this study, we demonstrate the ability, instead, to h…
Counterdiabatic Driving for Periodically Driven Systems
Paul Manuel Schindler, Marin Bukov
Periodically driven systems have emerged as a useful technique to engineer the properties of quantum systems, and are in the process of being developed into a standard toolbox for…
Reconstructing effective Hamiltonians from nonequilibrium (pre-)thermal steady states
Sourav Nandy, Markus Schmitt, Marin Bukov +1
Reconstructing Hamiltonians from local measurements is key to enabling reliable quantum simulation: both validating the implemented model, and identifying any left-over terms with…
Adaptive Trotterization for time-dependent Hamiltonian quantum dynamics using piecewise conservation laws
Hongzheng Zhao, Marin Bukov, Markus Heyl +1
Digital quantum simulation relies on Trotterization to discretize time evolution into elementary quantum gates. On current quantum processors with notable gate imperfections, there…
Making Trotterization adaptive and energy-self-correcting for NISQ devices and beyond
Hongzheng Zhao, Marin Bukov, Markus Heyl +1
Simulation of continuous time evolution requires time discretization on both classical and quantum computers. A finer time step improves simulation precision, but it inevitably lea…
Continuously tracked, stable, large excursion trajectories of dipolar coupled nuclear spins
Ozgur Sahin, Hawraa Al Asadi, Paul Schindler +9
We report an experimental approach to excite, stabilize, and continuously track Bloch sphere orbits of dipolar-coupled nuclear spins in a solid. We demonstrate these results on a m…
Self-Correcting Quantum Many-Body Control using Reinforcement Learning with Tensor Networks
Friederike Metz, Marin Bukov
Quantum many-body control is a central milestone en route to harnessing quantum technologies. However, the exponential growth of the Hilbert space dimension with the number of qubi…
Observation of a critical prethermal discrete time crystal created by two-frequency driving
William Beatrez, Christoph Fleckenstein, Arjun Pillai +8
We report the observation of long-lived Floquet prethermal discrete time crystalline (PDTC) order in a three-dimensional position-disordered lattice of interacting dipolar-coupled…
Parametric instabilities in a 2D periodically-driven bosonic system: Beyond the weakly-interacting regime
T. Boulier, J. Maslek, M. Bukov +6
We experimentally investigate the effects of parametric instabilities on the short-time heating process of periodically-driven bosons in 2D optical lattices with a continuous trans…
Geometric Speed Limit of Accessible Many-Body State Preparation
Marin Bukov, Dries Sels, Anatoli Polkovnikov
We analyze state preparation within a restricted space of local control parameters between adiabatically connected states of control Hamiltonians. We formulate a conjecture that th…
Glassy Phase of Optimal Quantum Control
Alexandre G. R. Day, Marin Bukov, Phillip Weinberg +2
We study the problem of preparing a quantum many-body system from an initial to a target state by optimizing the fidelity over the family of bang-bang protocols. We present compell…
Reinforcement Learning in Different Phases of Quantum Control
Marin Bukov, Alexandre G. R. Day, Dries Sels +3
The ability to prepare a physical system in a desired quantum state is central to many areas of physics such as nuclear magnetic resonance, cold atoms, and quantum computing. Yet,…