Article
Physics, Multidisciplinary
V Roman-Rodriguez, B. Brecht, K. Srinivasan, C. Silberhorn, N. Treps, E. Diamanti, V Parigi
Summary: Configurable and scalable continuous variable quantum networks for measurement-based quantum information protocols can be obtained via parametric down conversion in non-linear waveguides, with the use of symmetric group velocity matching. By identifying type II PDC in a single waveguide as the best suited process, multiple modes with non-negligible amount of squeezing can be obtained, paving the way toward large-scale quantum networks in the CV regime.
NEW JOURNAL OF PHYSICS
(2021)
Article
Multidisciplinary Sciences
Pawel Blasiak, Ewa Borsuk, Marcin Markiewicz
Summary: The proposed linear-optical scheme generates an arbitrary state of three qubits using only three independent input particles and post-selection of the coincidence type at the output. The success probability is equal for any desired state, and the optical design remains insensitive to particle statistics.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Electrical & Electronic
Ying Wang, Jun Xiao, Ting-Fung Chung, Zhaoyu Nie, Sui Yang, Xiang Zhang
Summary: This research reveals that electrically induced transitions between hexagonal and monoclinic phases of molybdenum ditelluride can be used to directly modulate the second-order susceptibility, enabling the fabrication of a second-harmonic-generation modulator with a high on/off ratio and broad bandwidth capabilities.
NATURE ELECTRONICS
(2021)
Article
Optics
Nikolaos Liaros, John T. Fourkas
Summary: This study analyzed the accuracy of four techniques for measuring the effective order of absorption (EOA) in radical photoresists multiphoton absorption polymerization. It was found that methods based on limited reciprocity can accurately determine EOA under a wider range of operating conditions.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Dov Fields, Janos A. Bergou, Mark Hillery, Siddhartha Santra, Vladimir S. Malinovsky
Summary: Quantum information processing using linear optics is challenging due to limitations in deterministic operations, but optimizing linear optical operations can facilitate specific tasks without the need for ancillary photons. This study focuses on unambiguous discrimination of Bell-like states using linear optics and provides a configuration that achieves optimal discrimination.
Article
Nanoscience & Nanotechnology
Charles J. IV Zeman, Gyeongwon Kang, Kevin L. Kohlstedt
Summary: The aggregation effect on two-photon absorption was studied using computational simulations. It was found that the 2PA cross sections of dyes are strongly influenced by the structure and stacking arrangements in the aggregated state.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Philip Thomas, Leonardo Ruscio, Olivier Morin, Gerhard Rempe
Summary: This article introduces a deterministic protocol for creating photonic entanglement with a single memory atom in a cavity. By interleaving controlled single-photon emissions with tailored atomic qubit rotations, it is possible to efficiently grow multi-photon GHZ states and linear cluster states.
Article
Chemistry, Multidisciplinary
Dapeng Huang, Haohai Yu, Huaijin Zhang
Summary: Transition metal carbides, nitrides or carbonitrides (MXenes) have rich element composition and structural tunability, showing diverse physical and chemical properties in optical related fields such as photon emission, transparent conductivity, energy storage, nonlinear optics, surface plasmon and Raman enhancement, photothermal transformation, photocatalysis, and optical response, with great application potential.
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
(2021)
Article
Multidisciplinary Sciences
Yulin Chi, Jieshan Huang, Zhanchuan Zhang, Jun Mao, Zinan Zhou, Xiaojiong Chen, Chonghao Zhai, Jueming Bao, Tianxiang Dai, Huihong Yuan, Ming Zhang, Daoxin Dai, Bo Tang, Yan Yang, Zhihua Li, Yunhong Ding, Leif K. Oxenlowe, Mark G. Thompson, Jeremy L. O'Brien, Yan Li, Qihuang Gong, Jianwei Wang
Summary: In this study, the authors demonstrate a programmable qudit-based quantum processor in a silicon photonic chip, showcasing its advantages in enhancing quantum computational parallelism. By reprogramming the configuration of the processor, they successfully implemented various quaternary quantum algorithms, highlighting the potential of qudits in improving quantum computing capabilities.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Peiyao Pan, Lingling Liu, Lidi Zhang, Xiao Wei, Yupeng Tian, Xi Kang, Qiong Zhang, Manzhou Zhu
Summary: Control over the single-, two-, and three-photon excited fluorescence of metal nanoclusters has been achieved by exploiting the solvent effect. A luminous nanocluster was synthesized and its structure was determined. The results demonstrate that the solvent effect can not only control the fluorescence of the nanocluster, but also regulate its photoluminescence nature as single-, two-, and three-photon excited fluorescence.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Physics, Multidisciplinary
Rachna Joshi
Summary: The study calculated two-photon transition amplitudes for bound-to-bound transitions in hydrogen under the influence of the MGECSC potential, and investigated the variation in transition amplitude with different potential parameters. It was observed that the enhancement in transition amplitudes occurs when the system is in resonance with an intermediate level upon absorption of a single photon.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Optics
Raffaele Filosa, Giuseppe S. Elettivo, Mario Ferraro, Salvatore Procopio, Antonella Nicolino, Maria C. Crocco, Joseph J. Beltrano, Riccardo C. Barberi, Vincenzo Formoso, Rita Guzzi, Antonio De Luca, Giovanna Agrosi, Gioacchino Tempesta, Raffaele G. Agostino
Summary: We investigated the nonlinear optical properties of natural topaz and for the first time, observed nonlinear phenomena related to multiphoton absorption effects. We detected the presence of material defects and rare earth elements through nonlinear spectral broadening of laser beams, which cannot be detected by standard characterization techniques. Our results demonstrate the usefulness of nonlinear optical effects induced luminescence measurements for the characterization of natural gems. Additionally, we triggered extreme nonlinear effects using intense infrared laser pulses. Our research provides insights into the development of materials for nonlinear photonics.
JOURNAL OF LUMINESCENCE
(2023)
Article
Physics, Multidisciplinary
P. Steindl, H. Snijders, G. Westra, E. Hissink, K. Iakovlev, S. Polla, J. A. Frey, J. Norman, A. C. Gossard, J. E. Bowers, D. Bouwmeester, W. Loffler
Summary: By manipulating a random continuous single-photon stream using quantum interference, engineered quantum states of light with tunable photon statistics, including photon quantum entanglement, are created. These artificial light states, more complex than coherent states, serve as resources for multiphoton entanglement.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Tomohiro Ishikawa, Yuki Kawasaki, Kenji Tsuji, Rika Yamada, Izumi Watanabe, Bin Wu, Shoki Iwaguchi, Ryuma Shimizu, Kurumi Umemura, Koji Nagano, Yutaro Enomoto, Kentaro Komori, Yuta Michimura, Akira Furusawa, Seiji Kawamura
Summary: Decihertz Interferometer Gravitational Wave Observatory (DECIGO) is a future space-borne laser interferometer mission designed to detect primordial gravitational waves (PGWs) at frequencies around 0.1 Hz. To improve the signal-to-noise ratio of the PGWs, a quantum locking technique with an optical spring has been proposed. In this paper, the sensitivity optimization by completing the square of multiple detector outputs, a key element of the theory, is experimentally verified using a simplified tabletop optical setup.
Article
Chemistry, Physical
Kaushik D. D. Nanda, Sahil Gulania, Anna I. I. Krylov
Summary: The equation-of-motion coupled-cluster singles and doubles method with double electron attachment (EOM-DEA-CCSD) is extended to calculate two-photon absorption (2PA) cross sections of diradicals and polyenes. The performance of this new implementation is compared with the CC3 quadratic response theory approach. The EOM-DEA-CCSD 2PA cross sections are comparable to the CC3 results for twisted ethene, but show large discrepancies for hexatriene, explained by configurational analysis of the 2PA channels.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Zahra Baghali Khanian, Manabendra Nath Bera, Arnau Riera, Maciej Lewenstein, Andreas Winter
Summary: We extend the previous results on quantum thermodynamics to the case of multiple non-commuting charges and develop a resource theory of thermodynamics for asymptotically many non-interacting systems. The phase diagram of the system is formed by associating the vector of expected charge values and entropy with every state. Our key result is the Asymptotic Equivalence Theorem, which connects the equivalence classes of states under asymptotic charge-conserving unitaries with the points on the phase diagram. Using the phase diagram, we analyze the first and second laws of thermodynamics and provide insights into the storage of different charges in physically separate batteries.
ANNALES HENRI POINCARE
(2023)
Editorial Material
Physics, Multidisciplinary
Carlo Manzo, Gorka Munoz-Gil, Giovanni Volpe, Miguel Angel Garcia-March, Maciej Lewenstein, Ralf Metzler
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Quantum Science & Technology
Lin Zhang, Utso Bhattacharya, Adrian Bachtold, Stefan Forstner, Maciej Lewenstein, Fabio Pistolesi, Tobias Grass
Summary: Quantum dots placed on a vibrating nanotube provide a platform for studying electron-phonon interactions, which has promising prospects for discovering new quantum materials and understanding strong correlation effects. By coupling the dots to an electronic reservoir, the state of the system can be easily prepared. Our study shows that for certain coupling strengths, the system undergoes a Peierls transition into an insulating regime with charge-density wave order in the steady state, resulting from the competition between electronic Coulomb repulsive interactions and phonon-induced attractive interactions. The transport phenomena observed can serve as fingerprints of electronic correlations. We also present powerful numerical methods to capture the physics of this open electron-phonon system with a large number of phonons. Our work paves the way for studying and detecting correlated electron-phonon physics with current experimental techniques in nanotube quantum simulators.
NPJ QUANTUM INFORMATION
(2023)
Article
Physics, Multidisciplinary
H. Jiang, M. Mandrysz, A. Sanchez, J. Dura, T. Steinle, J. S. Prauzner-Bechcicki, J. Zakrzewski, M. Lewenstein, F. He, J. Biegert, M. F. Ciappina
Summary: This study investigates the non-sequential double ionization (NSDI) in argon induced by a 3100 nm laser source through joint experimental and theoretical approaches. The correlated photoelectron momentum distribution (PMD) is found to strongly depend on the pulse duration, which can be explained by an envelope-induced intensity effect. The laser vector potential at the ionization time of the bound electron is influenced by the pulse duration, leading to different drift momenta. This work highlights the significance of pulse duration in NSDI and enhances our understanding of strong field tunnel-recollision dynamics under mid-IR laser fields.
NEW JOURNAL OF PHYSICS
(2023)
Article
Quantum Science & Technology
Lorenzo Cardarelli, Sergi Julia-Farre, Maciej Lewenstein, Alexandre Dauphin, Markus Mueller
Summary: This work investigates a realistic scenario for the quantum simulation of interaction-induced topological phases using cold Rydberg-dressed atoms in optical lattices. The phase diagram of spinless fermions on a checkerboard lattice is analyzed in the mean-field approximation, and the stability of the phases with respect to temperature and quantum fluctuations is studied. An implementation protocol is proposed to access the topological properties of the model in state-of-the-art cold atom quantum simulators.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Tomasz Szoldra, Marcelo F. Ciappina, Nicholas Werby, Philip H. Bucksbaum, Maciej Lewenstein, Jakub Zakrzewski, Andrew S. Maxwell
Summary: Deep learning models, particularly convolutional neural networks (CNNs), have shown great interpretability for image-like data. In this study, CNNs were tested on strong-field ionization photoelectron spectra to 'invert' experimental data and extract reliable laser intensity uncertainties. The study also highlights the importance of data augmentation techniques and accounting for detector saturation in training the models.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
U. Bhattacharya, Th Lamprou, A. S. Maxwell, A. Ordonez, E. Pisanty, J. Rivera-Dean, P. Stammer, M. F. Ciappina, M. Lewenstein, P. Tzallas
Summary: Strong laser field physics and quantum optics have been recently connected. Studies have shown that intense laser-matter interactions can generate controllable entangled and non-classical light states, opening up new research areas in these fields.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Review
Physics, Multidisciplinary
Irenee Frerot, Matteo Fadel, Maciej Lewenstein
Summary: This review discusses methods for detecting and characterizing quantum correlations in many-body systems, with a focus on scalable approaches. It introduces concepts such as quantum entanglement, Einstein-Podolsky-Rosen steering, and Bell nonlocality, both in the bipartite scenario and their generalizations to multipartite cases. The review also covers recent progress in characterizing quantum correlations, experimental techniques for preparing and measuring highly-entangled many-body systems, and the challenges associated with each platform. It concludes with a list of open problems in the field.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Piotr Sierant, Titas Chanda, Maciej Lewenstein, Jakub Zakrzewski
Summary: We investigate the dynamics of a single mobile impurity in a bath of Anderson localized particles in the regime of relatively strong disorder and interactions. We find that at short times, there is evidence of many-body localization, but at longer timescales, the impurity spreads subdiffusively and gradually delocalizes the Anderson insulator. The observed phenomenology includes subdiffusive growth of mean square displacement, power-law decay of density correlation functions, and power-law growth of entanglement entropy.
Article
Materials Science, Multidisciplinary
Piotr Sierant, Maciej Lewenstein, Antonello Scardicchio, Jakub Zakrzewski
Summary: We use a polynomially filtered exact diagonalization algorithm to study the many-body localization (MBL) transition in disordered Floquet systems. We focus on the disordered kicked Ising model and demonstrate quantitatively that finite-size effects at the MBL transition are less severe than in the random field XXZ spin chains commonly studied in the context of MBL. Our findings also apply to other disordered Floquet models, showing smaller finite-size effects than those observed in typical disordered autonomous spin chains. We observe consistent indications of the MBL transition for several indicators of ergodicity breaking in the kicked Ising model. Additionally, we find that assuming a power-law divergence of the correlation length at the MBL transition yields a critical exponent nu approximately equal to 2, in agreement with the Harris criterion for one-dimensional disordered systems.
Article
Physics, Multidisciplinary
Borja Requena, Gorka Munoz-Gil, Maciej Lewenstein, Vedran Dunjko, Jordi Tura
Summary: This paper proposes a novel approach that combines relaxation techniques with deep reinforcement learning to find the best possible bounds within a limited computational budget. The viability and effectiveness of the method are illustrated through benchmark tests on two paradigmatic problems in quantum physics and quantum information processing. The results show that the proposed approach has good feasibility and performance.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Tomasz Szoldra, Piotr Sierant, Maciej Lewenstein, Jakub Zakrzewski
Summary: In this study, we introduce a correlation function difference (CFD) based on local density correlation functions for a one-dimensional spin system. By comparing correlations on a given site between a full system and its restriction, CFD provides useful information on transfer of information in quantum many-body systems. We investigate the examples of different phases in a disordered XXZ spin chain and find that CFD exhibits different behaviors in the ergodic and many-body localized regimes.
Article
Quantum Science & Technology
Philipp Stammer, Javier Rivera-Dean, Andrew Maxwell, Theocharis Lamprou, Andres Ordonez, Marcelo F. Ciappina, Paraskevas Tzallas, Maciej Lewenstein
Summary: Intense laser-matter interactions are of great interest in research and technology, playing important roles in atomic, molecular, and optical physics, as well as attosecond physics and ultrafast optoelectronics. Recent investigations have shown that these interactions can generate controllable high-photon-number entangled coherent states and coherent state superpositions. This tutorial provides a comprehensive fully quantized description of intense laser-atom interactions, covering processes such as high-harmonic generation and above-threshold ionization. It also discusses new phenomena that cannot be explained by semiclassical theories and explores the potential for quantum state engineering of light.
Article
Astronomy & Astrophysics
Valentin Kasper, Torsten V. Zache, Fred Jendrzejewski, Maciej Lewenstein, Erez Zohar
Summary: Lattice gauge theories play a fundamental role in various fields such as particle physics, condensed matter, and quantum information theory. While recent advancements in controlling artificial quantum systems have allowed for studying Abelian lattice gauge theories in tabletop experiments, realizing non-Abelian models remains challenging. In this study, we propose a coherent quantum control scheme to enforce non-Abelian gauge invariance in a one-dimensional SU(2) lattice gauge system and discuss the potential extension to other non-Abelian gauge symmetries and higher spatial dimensions. The presented coherent control scheme holds promise for the quantum simulation of non-Abelian lattice gauge theories due to its wide applicability.
Article
Physics, Multidisciplinary
Luca Barbiero, Josep Cabedo, Maciej Lewenstein, Leticia Tarruell, Alessio Celi
Summary: We propose a scheme to realize a frustrated Bose-Hubbard model with ultracold atoms in an optical lattice that comprises the frustrated spin-1/2 quantum XX model. Our scheme utilizes a magnetic flux in a square ladder with one real and one synthetic spin dimension. Although this system does not have geometrical frustration, it can be mapped into an effective triangular ladder with staggered fluxes at low energies for specific values of synthetic tunneling. The scheme allows for minimal instances of frustrated magnets without the need for real geometrical frustration, in a setup of minimal experimental complexity.
PHYSICAL REVIEW RESEARCH
(2023)
