A5061360396- Quantum many-body systems
- Diamond and Carbon-based Materials Research
- Theoretical and Computational Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Thermodynamics and Statistical Mechanics
- Quantum and electron transport phenomena
- High-pressure geophysics and materials
- Force Microscopy Techniques and Applications
- Physics of Superconductivity and Magnetism
- Atomic and Subatomic Physics Research
- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Spectroscopy and Quantum Chemical Studies
- Quantum, superfluid, helium dynamics
- Quantum optics and atomic interactions
- nanoparticles nucleation surface interactions
- Advanced Fiber Laser Technologies
- Plasmonic and Surface Plasmon Research
- Quantum Mechanics and Applications
- Magnetic properties of thin films
- Opinion Dynamics and Social Influence
- Strong Light-Matter Interactions
- Phase Equilibria and Thermodynamics
- Advanced Surface Polishing Techniques
- Photonic and Optical Devices
Harvard University Press
2024-2025
Harvard University
2023-2024
Center for Astrophysics Harvard & Smithsonian
2023-2024
University of California, Berkeley
2017-2023
Lawrence Berkeley National Laboratory
2021-2023
The Ohio State University
2021
Massachusetts Institute of Technology
2017-2018
The Kardar-Parisi-Zhang (KPZ) universality class describes the coarse-grained behavior of a wealth classical stochastic models. Surprisingly, KPZ was recently conjectured to also describe spin transport in one-dimensional quantum Heisenberg model. We tested this conjecture by experimentally probing cold-atom simulator via relaxation domain walls chains up 50 spins. found that domain-wall is indeed governed dynamical exponent z = 3/2 and occurrence scaling requires both integrability...
The most direct approach for characterizing the quantum dynamics of a strongly interacting system is to measure time evolution its full many-body state. Despite conceptual simplicity this approach, it quickly becomes intractable as size grows. An alternate think generating noise, which can be measured by decoherence probe qubit. Here we investigate what such tells us about system. In particular, utilize optically addressable spins experimentally characterize both static and dynamical...
Characterizing the local internal environment surrounding solid-state spin defects is crucial to harnessing them as nanoscale sensors of external fields. This especially germane case defect ensembles which can exhibit a complex interplay between interactions, fields, and lattice strain. Working with nitrogen-vacancy (NV) center in diamond, we demonstrate that electric fields dominate magnetic resonance behavior NV at low field. We introduce simple microscopic model quantitatively captures...
The existence of prethermal phases matter in long-range interacting systems is remarkably robust, opening the door to experimental realization a novel, disorder-free, discrete time crystal 1D.
Pressure alters the physical, chemical and electronic properties of matter. The development diamond anvil cell (DAC) enables tabletop experiments to investigate a diverse landscape high-pressure phenomena ranging from planetary interiors transitions between quantum mechanical phases. In this work, we introduce utilize novel nanoscale sensing platform, which integrates nitrogen-vacancy (NV) color centers directly into culet (tip) anvils. We demonstrate versatility platform by performing...
We implement and characterize a protocol that enables arbitrary local controls in dipolar atom array, where the degree of freedom is encoded pair Rydberg states. Our approach relies on combination addressing beams global microwave fields. Using this method, we directly prepare two different types three-atom entangled states, including $W$ state exhibiting finite chirality. verify nature underlying entanglement by performing quantum tomography. Finally, leveraging our ability to measure...
We analyze the dynamics of periodically-driven (Floquet) Hamiltonians with short- and long-range interactions, finding clear evidence for a thermalization time, $\tau^*$, that increases exponentially drive frequency. observe this behavior, both in systems short-ranged where our results are consistent rigorous bounds, such bounds do not exist at present. Using combination heating entanglement dynamics, we explicitly extract effective energy scale controlling rate thermalization. Finally,...
In this paper, we prove a family of Lieb-Robinson bounds for discrete spin systems with long-range interactions. Our results apply arbitrary $k$-body interactions, so long as they decay power law greater than $kd$, where $d$ is the dimension system. More precisely, require that sum norm terms diameter or equal to $R$, acting on any one site, decays $1/{R}^{\ensuremath{\alpha}}$, $\ensuremath{\alpha}>d$. These allow us that, at fixed time, spatial time evolved operator follows arbitrarily...
Prethermal time crystal Characterizing and understanding different phases of matter in equilibrium is usually associated with the process thermalization, where system equilibrates. Recent efforts probing nonequilibrium systems have revealed that periodic driving can suppress natural tendency for equilibration yet still form new, phases. Kyprianidis et al. used a quantum simulator composed 25 trapped ion qubits spins to observe such phase matter: disorder-free prethermal discrete crystal. The...
We demonstrate that the prethermal regime of periodically driven (Floquet), classical many-body systems can host nonequilibrium phases matter. In particular, we show there exists an effective Hamiltonian captures dynamics ensembles trajectories despite breakdown this description at single trajectory level. addition, prove emergent symmetries protected by discrete time-translation symmetry drive. The spontaneous breaking such leads to a subharmonic response, characteristic time crystalline...
Although the Bethe ansatz solution of spin-1/2 Heisenberg model dates back nearly a century, anomalous nature its high-temperature transport dynamics has only recently been uncovered. Indeed, numerical and experimental observations have demonstrated that spin in this paradigmatic falls into Kardar-Parisi-Zhang (KPZ) universality class. This inspired significantly stronger conjecture KPZ dynamics, fact, occur all integrable chains with non-Abelian symmetry. Here, we provide extensive evidence...
Topologically ordered phases of matter elude Landau's symmetry-breaking theory, featuring a variety intriguing properties such as long-range entanglement and intrinsic robustness against local perturbations. Their extension to periodically driven systems gives rise exotic new phenomena that are forbidden in thermal equilibrium. Here, we report the observation signatures phenomenon-a prethermal topologically time crystal-with programmable superconducting qubits arranged on square lattice. By...
Strongly disordered systems in the many-body localized (MBL) phase can exhibit ground state order highly excited eigenstates. The interplay between localization, symmetry, and topology has led to characterization of a broad landscape MBL phases ranging from spin glasses time crystals symmetry protected topological phases. Understanding nature transitions these different forms eigenstate remains an essential open question. Here, we conjecture that no direct transition distinct orders occur;...
The discrete time crystal (DTC) is a recently discovered phase of matter that spontaneously breaks time-translation symmetry. Disorder-induced many-body-localization required to stabilize DTC arbitrary times, yet an experimental investigation this localized regime has proven elusive. Here, we observe the hallmark signatures many-body-localized using novel quantum simulation platform based on individually controllable $^{13}$C nuclear spins in diamond. We demonstrate characteristic long-lived...
Symmetry-protected topological phases cannot be described by any local order parameter and are beyond the conventional symmetry-breaking paradigm for understanding quantum matter. They characterized boundary states robust against perturbations that respect protecting symmetry. In a clean system without disorder, these edge modes typically only occur ground of systems with bulk energy gap would not survive at finite temperatures due to mobile thermal excitations. Here, we report observation...
Quantum computing and quantum sensing represent two distinct frontiers of information science. In this work, we harness to solve a fundamental practically important problem: the detection weak oscillating fields with unknown strength frequency. We present enhanced protocol that outperforms all existing approaches. Furthermore, prove our approach is optimal by establishing Grover-Heisenberg limit -- lower bound on minimum time. The key idea robustly digitize continuous, analog signal into...
Characterizing the low-energy dynamics of quantum materials is crucial to our understanding strongly correlated electronic states. However, extracting universal dynamical features requires resolving correlations at both low energy and momentum. Here, we introduce nitrogen-vacancy (NV) centers in diamond as a novel powerful sensing platform superconducting materials. We demonstrate strengths approach by probing several phenomena high-$T_c$ cuprate Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ (BSCCO) --...
<title>Abstract</title> Symmetry-protected topological phases cannot be described by any local order parameter and are beyond the conventional symmetry-breaking paradigm for understanding quantum matter. They characterized boundary modes that remain stable under symmetry respecting perturbations. In clean, gapped systems without disorder, stability of these edge is restricted to ground state manifold; at finite temperatures, interactions with mobile thermal excitations lead their decay....
A tremendous amount of recent attention has focused on characterizing the dynamical properties periodically driven many-body systems. Here, we use a novel numerical tool termed `density matrix truncation' (DMT) to investigate late-time dynamics large-scale Floquet We find that DMT accurately captures two essential pieces physics, namely, prethermalization and heating infinite temperature. Moreover, by implementing spatially inhomogeneous drive, demonstrate an interplay between diffusive...
The transition between distinct phases of matter is characterized by the nature fluctuations near critical point. We demonstrate that noise spectroscopy can not only diagnose presence a phase transition, but also determine fundamental properties its criticality. In particular, analyzing scaling collapse decoherence profile, one directly extract exponents and identify universality class. Our approach naturally captures conservation laws distinguishes classical quantum transitions. context...
The discovery of orbital angular momentum (OAM) in light established a new degree freedom by which to control not only its flow but also interaction with matter. Here, we show that shaping extremely sub-wavelength polariton modes, for example imbuing plasmon and phonon OAM, engineer transitions are allowed or forbidden electronic systems such as atoms, molecules, artificial atoms. Crucial the feasibility these engineered selection rules is access conventionally afforded polaritons. We find...
Strong interactions between particles can lead to emergent collective excitations. These phenomena have been extensively established in electronic systems, but are also expected occur for gases of neutral like spin waves, known as magnons, a ferromagnet. In hydrodynamic regime where magnons strongly interacting, they form slow density mode -- analogy sound waves water with characteristic low-frequency signatures. While such has predicted theory, its signatures yet be observed experimentally....
We show that locally interacting, periodically driven (Floquet) Hamiltonian dynamics coupled to a Langevin bath support finite-temperature discrete time crystals (DTCs) with an infinite autocorrelation time. By contrast both prethermal and many-body localized DTCs, the crystalline order we uncover is stable arbitrary perturbations, including those break translation symmetry of underlying drive. Our approach utilizes general mapping from probabilistic cellular automata open classical Floquet...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text F. Machado, N. Rivera, H. Buljan, M. Soljačić, and I. Kaminer, "Shaping Polaritons Reshape Selection Rules," in Conference Lasers Electro-Optics, OSA Technical Digest (online) (Optica Publishing Group, 2017), paper FTh3D.8. Export BibTex Endnote (RIS) HTML Plain alert Save article