Article
Materials Science, Multidisciplinary
Thivan M. Gunawardana, Berislav Buca
Summary: This study rigorously demonstrates and explains the existence of certain algebraic structures that are exponentially stable in time, which leads to the understanding of various phenomena observed in Stark many-body localized (SMBL) systems, such as Bloch many-body oscillations, quantum many-body scars, and fragmentation. Numerical results confirm the theoretical findings. Additionally, the study provides an explanation for the thermalization observed in recent two-dimensional tilted experiments and suggests the potential for quantum information processing in Stark MBL systems even at high temperature.
Article
Chemistry, Physical
Yasuhiko Takeda, Shunsuke Sato, Takeshi Morikawa
Summary: In this study, we applied hot-carrier extraction to particulate photocatalysts and found that the hot-carrier photocatalysts have higher solar-to-chemical energy conversion efficiencies for H-2 and CO production. However, efficient hot-carrier extraction requires a sufficiently large carrier density in the core, which can be achieved through concentrated solar illumination.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Jia Wei Melvin Lim, Yue Wang, Jianhui Fu, Qiannan Zhang, Tze Chien Sum
Summary: This study establishes a connection between the ultrafast HC cooling properties of halide perovskites and their manifestations in steady-state photoluminescence spectra. By retrieving essential HC metrics under nonequilibrium conditions, the findings show that perovskites have thermalization coefficients an order of magnitude lower than incumbent absorbers. The direct approach taken in this research deepens the understanding of HC contributions to efficiency enhancements and enables broader access to the HC research community, potentially speeding up the development of perovskite HC solar cells.
ACS ENERGY LETTERS
(2022)
Article
Physics, Multidisciplinary
Dongsung T. Park, Uhjin Kim, Dongkun Kim, Hwanchul Jung, Juho Choi, Cheolhee Han, Yunchul Chung, H-S Sim, V Umansky, Hyoungsoon Choi, Hyung Kook Choi
Summary: Research on mesoscopic quantum dots shows a significant energy relaxation phenomenon of hot electrons emitted, deviating from Fermi gas predictions. Simulation experiments indicated a capacitive interaction transferring energy from hot electrons to quantum dots, suggesting the presence of an overlooked relaxation mechanism intrinsic to QD emissions.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Naveen Nishad, M. Santhosh, G. J. Sreejith
Summary: We numerically study quenches from a fully ordered state to the ferromagnetic regime of the chiral Z(3) clock model, where the physics can be understood in terms of sparse domain walls of six flavors. The growth of entropy with time is linear, but in the case of the chiral model, the entropy of small subsystems near an open boundary saturates.
Article
Physics, Multidisciplinary
Joseph Durnin, M. J. Bhaseen, Benjamin Doyon
Summary: Motivated by experiments on cold atomic gases, a quantum kinetic approach to weakly perturbed integrable models out of equilibrium is developed. Using exact matrix elements, an analytical approach to real-time dynamics is established, providing predictions for physical quantities' time evolution and conceptual links between quantum many-body dynamics and classical theory. Specific perturbations that do not cause thermalization in the weakly perturbed regime are identified.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Fluids & Plasmas
Yicheng Zhang, Lev Vidmar, Marcos Rigol
Summary: This study investigates the statistical properties of off-diagonal matrix elements of observables in the energy eigenstates of integrable quantum systems. It is found that these matrix elements are dense in the spin-1/2 XXZ chain, while being sparse in noninteracting systems. The distribution of off-diagonal matrix elements in the quasimomentum occupation of hard-core bosons in one dimension is well described by generalized Gamma distributions, irrespective of translational invariance but not in the presence of localization. Additionally, the off-diagonal matrix elements of observables in the spin-1/2 XXZ model can be well described by a generalized Gamma distribution.
Article
Physics, Multidisciplinary
Matteo Ippoliti, Tibor Rakovszky, Vedika Khemani
Summary: The extension of many-body quantum dynamics to the nonunitary domain has led to the discovery of steady-state phases with various entanglement scaling behavior, from logarithmic to extensive to fractal. By utilizing a duality transformation, the relationship between unitary and nonunitary dynamics is revealed, shedding light on the growth of entanglement in unitary circuits and the corresponding nonunitary circuits. This understanding allows for the derivation of nonthermal volume-law entangled phases and the identification of steady-state phases with fractal entanglement scaling. Additionally, an experimental protocol for preparing these novel steady states has been proposed.
Article
Physics, Multidisciplinary
Elmer Guardado-Sanchez, Benjamin M. Spar, Peter Schauss, Ron Belyansky, Jeremy T. Young, Przemyslaw Bienias, Alexey Gorshkov, Thomas Iadecola, Waseem S. Bakr
Summary: We induce strong nonlocal interactions in a 2D Fermi gas in an optical lattice using Rydberg dressing, measure the interactions, and study the lifetime of the gas in the presence of tunneling, finding that tunneling does not reduce the lifetime. Investigating the interplay of nonlocal interactions with tunneling, we find that strong nearest-neighbor interactions slow down the relaxation dynamics of charge-density waves in the gas. Our work opens the door for quantum simulations of systems with strong nonlocal interactions such as extended Fermi-Hubbard models.
Article
Materials Science, Multidisciplinary
Gilles Parez, Riccarda Bonsignori, Pasquale Calabrese
Summary: The time evolution of entanglement entropy is crucial for understanding the structure of nonequilibrium quantum states, often described by moving quasiparticles spreading entanglement. Studies using examples from conformal field theories and free fermion chains suggest that the quasiparticle picture can be adapted to understand how entanglement splits in systems with internal local symmetry. Physically relevant effects, such as delay time for onset of charged entropies and effective equipartition, can be easily observed in atomic experiments.
Article
Materials Science, Multidisciplinary
Shao-Hen Chiew, Jiangbin Gong, Leong-Chuan Kwek, Chee-Kong Lee
Summary: This article investigates the stability and final localization properties of a disordered Heisenberg spin chain coupled to a finite environment. It finds that within smaller system sizes, a strongly localized system can retain remnant information on its initial state at long times, despite coupling to a finite ergodic environment. However, strong dependencies on the initial state and coupling strength are observed in a ladder configuration, which can lead to either the loss or retention of information.
Article
Multidisciplinary Sciences
F. H. B. Somhorst, R. van der Meer, M. Correa Anguita, R. Schadow, H. J. Snijders, M. de Goede, B. Kassenberg, P. Venderbosch, C. Taballione, J. P. Epping, H. H. van den Vlekkert, J. Timmerhuis, J. F. F. Bulmer, J. Lugani, I. A. Walmsley, P. W. H. Pinkse, J. Eisert, N. Walk, J. J. Renema
Summary: This study demonstrates that in a unitarily evolving system, single-mode measurements can converge to a thermal state using photons in an integrated optical interferometer. The resolution to the paradox between unitary evolution and the second law of thermodynamics is the recognition that the global unitary evolution of a multi-partite quantum state causes local subsystems to evolve towards maximum-entropy states. The experiment utilizes a programmable integrated quantum photonic processor to manipulate quantum states and shows the potential of photonic devices for simulating non-Gaussian states.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Lorenzo Gotta, Leonardo Mazza, Pascal Simon, Guillaume Roux
Summary: We study a 1D model Hamiltonian of spinless fermions, where the eta-pairing states are quantum many-body scars exhibiting excited states with subvolume entanglement entropy scaling, forming a tower of equally spaced states in energy with periodic oscillations in time evolution. These states weakly break the eigenstate thermalization hypothesis, unlike the other excited states which behave thermally.
Article
Chemistry, Physical
Dipti Jasrasaria, Eran Rabani
Summary: Nonradiative processes control the efficiencies of semiconductor nanocrystal-based devices, and hot exciton cooling is a central process in which highly excited electron/hole pairs relax to form band-edge excitons through nonradiative means. However, the timescale and mechanism of cooling in nanocrystals are not well understood due to quantum confinement effects. Experimental measurements of the cooling timescale range six orders of magnitude.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Christian Eidecker-Dunkel, Peter Reimann
Summary: Allosterism traditionally refers to local changes in an extended object, but this study shows that such effects can also occur in simple quantum many-body systems, such as a spin chain. Introducing an impurity at one end of the chain leads to significant changes in the observable behavior near the other end, while the region in between remains largely unaffected.
Article
Materials Science, Multidisciplinary
Mark Thomas, Torsten Karzig, Silvia Viola Kusminskiy
Article
Materials Science, Multidisciplinary
Charles-Edouard Bardyn, Torsten Karzig, Gil Refael, Timothy C. H. Liew
Article
Materials Science, Multidisciplinary
Torsten Karzig, Armin Rahmani, Felix von Oppen, Gil Refael
Article
Materials Science, Multidisciplinary
Torsten Karzig, Falko Pientka, Gil Refael, Felix von Oppen
Article
Physics, Multidisciplinary
Torsten Karzig, Charles-Edouard Bardyn, Netanel H. Lindner, Gil Refael
Article
Physics, Multidisciplinary
Torsten Karzig, Yuval Oreg, Gil Refael, Michael H. Freedman
Article
Physics, Multidisciplinary
Jonathan Reiner, Abhay Kumar Nayak, Nurit Avraham, Andrew Norris, Binghai Yan, Ion Cosma Fulga, Jung-Hyun Kang, Toesten Karzig, Hadas Shtrikman, Haim Beidenkopf
Article
Quantum Science & Technology
Christina Knapp, Michael Beverland, Dmitry I. Pikulin, Torsten Karzig
Article
Physics, Multidisciplinary
Bela Bauer, Torsten Karzig, Ryan V. Mishmash, Andrey E. Antipov, Jason Alicea
Article
Materials Science, Multidisciplinary
Torsten Karzig, Christina Knapp, Roman M. Lutchyn, Parsa Bonderson, Matthew B. Hastings, Chetan Nayak, Jason Alicea, Karsten Flensberg, Stephan Plugge, Yuval Oreg, Charles M. Marcus, Michael H. Freedman
Article
Materials Science, Multidisciplinary
David Aasen, Shu-Ping Lee, Torsten Karzig, Jason Alicea
Article
Materials Science, Multidisciplinary
Charles-Edouard Bardyn, Torsten Karzig
Article
Materials Science, Multidisciplinary
Kexin Yi, Torsten Karzig
Article
Materials Science, Multidisciplinary
Charles-Edouard Bardyn, Torsten Karzig, Gil Refael, Timothy C. H. Liew
Article
Materials Science, Multidisciplinary
Christina Knapp, Torsten Karzig, Roman M. Lutchyn, Chetan Nayak
