Article
Multidisciplinary Sciences
Andreas Schindewolf, Roman Bause, Xing-Yan Chen, Marcel Duda, Tijs Karman, Immanuel Bloch, Xin-Yu Luo
Summary: Ultracold polar molecules, with their strong electric dipole moments and rich internal structure, offer great potential for exploring exotic quantum matter, implementing quantum information schemes, and testing the fundamental symmetries of nature. However, the unstable collisions between molecules have so far prevented direct cooling to quantum degenerate states. In this study, we demonstrate evaporative cooling of fermionic sodium-potassium molecules to temperatures well below the Fermi temperature using microwave shielding.
Article
Materials Science, Multidisciplinary
Anoosha Fayyaz, J. P. Kestner
Summary: We propose a theoretical strategy to manipulate an individual spin in a large array of spin qubits with random distribution of g factors. By utilizing single-qubit and SWAP gates with the help of a global microwave field and local exchange pulses, only the target qubit undergoes the desired operation while all other qubits return to their original states, even those with the same Larmor frequency as the target. Gate fidelities above 99% can be achieved for arrays containing tens of qubits.
Article
Physics, Multidisciplinary
Timur V. Tscherbul, Jun Ye, Ana Maria Rey
Summary: We propose a general protocol for generating robust entangled states of nuclear and/or electron spins of ultracold polar molecules using electric dipolar interactions. By encoding a spin-1/2 degree of freedom in a combined set of spin and rotational molecular levels, we theoretically demonstrate effective spin-spin interactions enabled by efficient magnetic control over electric dipolar interactions. These interactions can be used to create long-lived cluster and squeezed spin states.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
William G. Tobias, Kyle Matsuda, Jun-Ru Li, Calder Miller, Annette N. Carroll, Thomas Bilitewski, Ana Maria Rey, Jun Ye
Summary: Precise control of interacting molecules was achieved, allowing for the realization of quantum phenomena. Ultracold molecules confined in optical lattice were prepared and imaged using an electric field gradient. The local chemical reaction rate was regulated by adjusting the interactions between molecules.
Article
Quantum Science & Technology
Jonas Schuff, Dominic T. Lennon, Simon Geyer, David L. Craig, Federico Fedele, Florian Vigneau, Leon C. Camenzind, Andreas V. Kuhlmann, Andrew D. Briggs, Dominik M. Zumbuhl, Dino Sejdinovic, Natalia Ares
Summary: This study presents a machine learning algorithm capable of automatically identifying Pauli spin blockade (PSB) and utilizing it for spin qubit initialization and readout, even at elevated temperatures. The scarcity of PSB data is overcome by training the algorithm with simulated data and using cross-device validation. The algorithm is demonstrated on a silicon field-effect transistor device, achieving an accuracy of 96% on different test devices and showing robustness to device variability. It is expected to be applicable across all types of quantum dot devices, serving as an essential step towards fully automatic qubit tuning.
Article
Chemistry, Physical
Wenli Ma, Qiao Liu, Junmin Li, Lin Tian, Hong Zhu
Summary: This study synthesized several poly(biphenyl piperidine-trifluoroacetophenone) based polymers with different grafting ratios of polar alkyl nitrile side chains, named PBPAp-PN-x. The relationship between the structure and performance, including conductivity, swelling ratio, morphology, and single-cell performance, was investigated. Molecular dynamics simulations were also conducted to reveal the mechanism of the structure-property relationship. The advantage of grafting dipolar molecules in AEMs effectively resolves the trade-off problem between ionic conductivity and dimensional stability and shows promising application in fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Josef Weinbub, Mauro Ballicchia, Mihail Nedjalkov
Summary: This article introduces a new type of electron quantum interference structure for logic gate operations using the wave nature of electrons. Unlike other electron control approaches, this structure does not require magnetic or photonic mechanisms and achieves specific current levels through gate-controlled interference effects.
Article
Physics, Applied
Jie-Cheng Yang, Zong-Hu Li, Bao-Chuan Wang, Hai-Ou Li, Gang Cao, Guo-Ping Guo
Summary: Research has shown that using micromagnets on silicon to achieve full electrical spin manipulation and spin-photon coupling has become prevalent. However, the parallel placement of micromagnets necessary for spin-photon coupling also generates detrimental magnetic field gradients, which leads to qubit dephasing.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Robert E. Throckmorton, S. Das Sarma
Summary: We investigate the impact of leakage on the realization of a discrete time crystal (DTC) in a semiconductor quantum dot linear array, and demonstrate that the DTC phase can be restored by introducing an alternating magnetic field.
Article
Multidisciplinary Sciences
Ryan M. Jock, N. Tobias Jacobson, Martin Rudolph, Daniel R. Ward, Malcolm S. Carroll, Dwight R. Luhman
Summary: This research demonstrates a method for controlling electron spin qubits on a silicon heterointerface through spin-orbit effects, without the need for complex nanofabrication equipment. The method offers high logic gate orthogonality and long qubit coherence time, while enabling fast control. The study also investigates charge noise in a silicon double quantum dot through dynamical decoupling experiments and evaluates qubit frequency drift and low-frequency noise.
NATURE COMMUNICATIONS
(2022)
Article
Biophysics
Guojie Qin, Lixiang Zuo, Yanli Wei, Li Wang, Graham Bodwell
Summary: The paper introduces a highly sensitive sensing system for alkaline phosphatase using room temperature phosphorescence, with intense emission in the absence of alkaline phosphatase that gradually decreases upon addition of the enzyme. Factors affecting the performance of the sensing system were optimized, resulting in a linear range for alkaline phosphatase from 0.2-10 U/L with a LOD at 0.045 U/L and a recovery rate in human serum from 93.75%-103.03%. Additionally, an RTP-based INHIBIT logic gate utilizing doped ZnS quantum dots was presented.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Optics
Naoki Hara, Masaya Nakagawa
Summary: We investigated the impact of chemical reactions-induced two-body loss on the quantum magnetism of fermionic polar molecules in an optical lattice. Our findings reveal that the interplay between dissipation and strong long-range interactions results in the formation of metastable ferromagnetic clusters. The spin states of these clusters are controlled by interaction parameters and reflect the symmetry of interactions. The size of the clusters strongly relies on the initial arrangement of molecules due to fragmentation in Hilbert space during dissipative many-body dynamics. We also built an effective model to demonstrate the emergence of metastable states as quasi-dark states and discussed their application in simulating the spin-S Heisenberg model.
Article
Multidisciplinary Sciences
Kenta Takeda, Akito Noiri, Takashi Nakajima, Takashi Kobayashi, Seigo Tarucha
Summary: In this article, the authors demonstrate a three-qubit phase-correcting code in silicon, successfully implementing quantum error correction (QEC) and showcasing the potential of a silicon-based platform for large-scale quantum computing.
Article
Multidisciplinary Sciences
Jun-Ru Li, Kyle Matsuda, Calder Miller, Annette N. Carroll, William G. Tobias, Jacob S. Higgins, Jun Ye
Summary: We demonstrate tunable itinerant spin dynamics using a gas of potassium-rubidium molecules confined to two-dimensional planes, where a spin-1/2 system is encoded into the molecular rotational levels. The dipolar interaction gives rise to a shift of the rotational transition frequency and a collision-limited Ramsey contrast decay that emerges from the coupled spin and motion. Both the Ising and spin-exchange interactions are precisely tuned by varying the strength and orientation of an electric field, as well as the internal molecular state.
Article
Physics, Applied
Ludwik Kranz, Stephen Roche, Samuel K. Gorman, Joris. G. Keizer, Michelle Y. Simmons
Summary: Donor dots realized with phosphorus atoms in silicon have proven to be excellent hosts for electron spin qubits. In this work, we show that using the donor nuclear spins as nanomagnets, we can engineer a large magnetic field gradient between the qubits, thereby minimizing sensitivity to charge noise and reducing errors during two-qubit CNOT gate operation. Our results provide a theoretical roadmap to achieve high-fidelity CNOT gates by optimizing both the local magnetic environment and the operating parameters of multidonor dot qubits.
PHYSICAL REVIEW APPLIED
(2023)
Article
Multidisciplinary Sciences
M. -G. Hu, Y. Liu, D. D. Grimes, Y. -W. Lin, A. H. Gheorghe, R. Vexiau, N. Bouloufa-Maafa, O. Dulieu, T. Rosenband, K. -K. Ni
Article
Chemistry, Physical
T. J. Barnum, H. Herburger, D. D. Grimes, J. Jiang, R. W. Field
JOURNAL OF CHEMICAL PHYSICS
(2020)
Article
Chemistry, Physical
Yu Liu, David D. Grimes, Ming-Guang Hu, Kang-Kuen Ni
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Alexander M. Prophet, Kritanjan Polley, Gary J. Van Berkel, David T. Limmer, Kevin R. Wilson
Summary: The oxidation kinetics of iodide by ozone at the air-water interface is studied in single microdroplets. Molecular simulations and kinetic modeling are used to understand the underlying multiphase mechanism.
Article
Chemistry, Multidisciplinary
Rong Zhang, Jiajing Lan, Fei Wang, Shumei Chen, Jian Zhang
Summary: By utilizing 1,1'-ferrocene dicarboxylic acid as a chelating and surface protection ligand, we have synthesized multi-nuclear indium oxide clusters with varying nuclear sizes, including heptanuclear and thirteen-nuclear clusters. These clusters possess labile coordination sites, allowing for structural modification and self-assembly, resulting in the formation of various cluster structures.
Article
Chemistry, Multidisciplinary
Hui Wang, Hui Liu, Mingsen Wang, Jiaheng Hou, Yongjun Li, Yuancheng Wang, Yingjie Zhao
Summary: Two supramolecular complexes were prepared using CBs and M1, and their single-crystal structures were analyzed by SCXRD. The unexpected 1:2 self-assembly structure between M1 and CB[8] was discovered for the first time. These complexes exhibit unique photophysical properties and provide valuable information about the structure and photophysical properties of supramolecular complexes.
Article
Chemistry, Multidisciplinary
Chang-Hee Lee, Sookil Park, Sanggil Kim, Ji Young Hyun, Hyun Soo Lee, Injae Shin
Summary: The epidermal growth factor receptor (EGFR) is a cell-surface glycoprotein involved in cell proliferation and tumor development. This study used a fluorescently labeled EGFR to investigate its time-dependent endocytosis in live cells and found that appended glycans affect EGFR internalization. Additionally, the study detected sialic acid residues attached to EGFR on the live cell surface using FRET-based imaging. This research provides valuable insights into the cellular functions of EGFR.
Article
Chemistry, Multidisciplinary
Subhankar Sahu, Lokesh Kumar, Sumita Das, Dipti Gupta, Ruchi Anand
Summary: This study proposes a strategy that combines organic electronics with biosensor scaffolds to create a compact device for monitoring environmental aromatic pollution. By coupling biosensing protein MopR with an organic electrochemical transistor (OECT), a sensor module capable of efficient detection of phenol was designed. Exclusive phenol detection with minimal loss of sensitivity could be achieved in complex pollutant mixtures and real environmental samples.
Review
Chemistry, Multidisciplinary
Changseok Lee, Hyung-Joon Kang, Sungwoo Hong
Summary: The formation of C-N bonds through hydroamination reactions catalyzed by nickel hydrides has been a topic of recent interest. This approach offers a way to efficiently transform a variety of alkene and alkyne substrates into compounds enriched with C-N bonds. The review provides a concise overview of the underlying reaction mechanisms and aims to stimulate further progress in NiH-catalytic techniques and catalyst design.
Article
Chemistry, Multidisciplinary
Yueci Wu, Lu-Lu Sun, Hai-Hao Han, Xiao-Peng He, Weiguo Cao, Tony D. James
Summary: Drug-induced liver injury (DILI) is a common cause of acute liver failure in the USA and Europe, but most cases can be recovered or prevented by discontinuing the offending drug. Recent research has found that peroxynitrite (ONOO-) can be used as a potential indicator for early diagnosis of DILI, and there is an urgent need to establish a method to detect and track peroxynitrite in DILI cases. In this study, a FRET-based nano fluorescent probe CD-N-I was developed, which showed high selectivity and sensitivity in detecting peroxynitrite. The probe successfully detected exogenous peroxynitrite in live cells and endogenous peroxynitrite in APAP-induced liver injury of HepG2 cells.
Article
Chemistry, Multidisciplinary
Dmitry L. Lipilin, Mikhail O. Zubkov, Mikhail D. Kosobokov, Alexander D. Dilman
Summary: This article describes a direct photocatalytic method for the thiolation of unprotected acids, which was previously challenging. By using a thionocarbonate reagent with an N-O bond, the efficient conversion of carboxylic acids to thiols is achieved.
Article
Chemistry, Multidisciplinary
Jason Malenfant, Lucille Kuster, Yohann Gagne, Kouassi Signo, Maxime Denis, Sylvain Canesi, Mathieu Frenette
Summary: Raman microscopy can reveal compound-specific vibrational fingerprints without sample preparation. The combination of efficient theoretical calculations and a user-friendly software can accurately predict peak positions and provide match scores to assist with structure determination.
Article
Chemistry, Multidisciplinary
Jayoh A. Hernandez, Paul S. Micus, Sean Alec Lois Sunga, Luca Mazzei, Stefano Ciurli, Gabriele Meloni
Summary: Essential trace metals play crucial roles in the survival and virulence of bacterial pathogens. Helicobacter pylori requires nickel for colonization and persistence in the stomach, and NixA is an essential nickel transporter in this process. This study characterizes the selectivity and electrogenic nature of NixA-mediated nickel transport.
Article
Chemistry, Multidisciplinary
Tarali Devi, Kuheli Dutta, Jennifer Deutscher, Stefan Mebs, Uwe Kuhlmann, Michael Haumann, Beatrice Cula, Holger Dau, Peter Hildebrandt, Kallol Ray
Summary: This study emphasizes the importance of subtle electronic changes and secondary interactions in the stability of biologically relevant metal-dioxygen intermediates. It also shows that the role of the chloride ligand in stabilizing the Fe-III-(OOBu)-Bu-t moiety can extend to other anions, including the thiolate ligand.
Article
Chemistry, Multidisciplinary
Jacqueline R. Santhouse, Jeremy M. G. Leung, Lillian T. Chong, W. Seth Horne
Summary: By studying the folding kinetics and mechanism of the BdpA sequence, researchers found that altering the backbone connectivity can affect protein folding. This suggests that protein mimetic chains have a significant degree of plasticity in transitioning between unfolded and folded states.
Article
Chemistry, Multidisciplinary
Divanshu Gupta, Ralf Einholz, Holger F. Bettinger
Summary: This study presents the first direct spectroscopic evidence of a cyclic seven-membered iminoborane. Compared to linear amino-iminoboranes, this cyclic iminoborane exhibits weakened bond strength and lower Lewis acidity value. The study suggests that the reduced ring strain of cyclic iminoborane prevents nitrogen fixation but allows facile (2 + 2) cycloaddition reaction with C2H4.
Article
Chemistry, Multidisciplinary
Renny Mathew, Aniruddha Mazumder, Praveen Kumar, Julie Matula, Sharmarke Mohamed, Petr Brazda, Mahesh Hariharan, Brijith Thomas
Summary: This study reveals the packing arrangement of partially disordered nitro-perylenediimide (NO2-PDI) using a synergistic approach that combines 3D ED, ssNMR, and DFT techniques. By overcoming these challenges, this methodology opens up new avenues for material characterization, driving exciting advancements in the field.