Article
Physics, Multidisciplinary
Paul Lauria, Wei-Ting Kuo, Nigel R. Cooper, Julio T. Barreiro
Summary: We have experimentally created a spin-momentum lattice using a trapped Fermi gas. This lattice, formed by cyclically rotated atom-laser couplings between three atomic spin states, creates a triangular lattice in a synthetic spin-momentum space. By demonstrating and studying this lattice's dynamics with spin- and momentum-resolved absorption imaging, new possibilities for synthetic spin systems and engineering topological bands are opened up.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
M. Hays, V Fatemi, D. Bouman, J. Cerrillo, S. Diamond, K. Serniak, T. Connolly, P. Krogstrup, J. Nygard, A. Levy Yeyati, A. Geresdi, M. H. Devoret
Summary: Researchers combined the advantages of semiconductor spin qubits and superconducting electrodynamic qubits to create the Andreev spin qubit, achieving coherent spin manipulation and discovering spin-flip time and spin coherence time.
Article
Optics
Lorenzo Rosso, Davide Rossini, Alberto Biella, Leonardo Mazza
Summary: Theoretical analysis has been conducted on the dynamics of a one-dimensional spin-1/2 fermionic gas with weak two-body losses, emphasizing the role of spin conservation in determining the full time evolution. Specifically, the study focuses on the dynamics of gas in different initial states and investigates the emergence of steady symmetry-resolved purification in Mott insulators. These results contribute to the comprehension of experiments involving alkaline-earth gases and fermionic molecules such as ytterbium.
Article
Materials Science, Multidisciplinary
Yang-Zhi Chou, Jennifer Cano, J. H. Pixley
Summary: In this study, a theory is developed to manipulate the effective band structure of interacting helical edge states on the boundary of two-dimensional time-reversal symmetric topological insulators. By tuning an external moire potential, interacting edge band gaps can be suppressed and interacting Dirac points can reemerge. In addition, nearly flat bands can be created by the moire potential with a long enough period, providing a novel way to enhance the coherence length of interacting helical edges.
Review
Chemistry, Multidisciplinary
Jing Mo, Xiaocheng Weng, Xiang Zhou
Summary: With increasing research interest, more than 170 types of chemical modifications of RNA have been characterized. These modifications do not alter the primary sequence of RNA but modulate gene activity. Developing innovative labeling and detection methodologies is crucial for understanding the biological significance and clinical prospects of RNA modifications.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Physics, Multidisciplinary
Wentian Zheng, Ke Bian, Xiakun Chen, Yang Shen, Shichen Zhang, Rainer Stohr, Andrej Denisenko, Jorg Wrachtrup, Sen Yang, Ying Jiang
Summary: An efficient method was developed to engineer the electrostatic environment of near-surface nitrogen vacancy center qubits, increasing their coherence and sensitivity.
Article
Materials Science, Multidisciplinary
Tomonari Mizoguchi, Yoshihito Kuno, Yasuhiro Hatsugai
Summary: The study reveals characteristic band structures of fermions on a square kagome lattice, including flat bands and two spin-1 Dirac cones. Additionally, in the presence of an external field, the profile of the Chern numbers around the modified spin-1 Dirac cones coincides with the conventional one.
Article
Materials Science, Multidisciplinary
Lorenzo Gotta, Leonardo Mazza, Pascal Simon, Guillaume Roux
Summary: In this study, we investigate a one-dimensional chain of spinless fermions with a multimer hopping term. We find that this chain can stabilize two distinct multimer phases and also exhibits intermediate phases where free fermions and multimer fluids coexist without spatial separation. We use density-matrix renormalization group techniques to establish the phase diagram of the model for the case of trimers and observe hybridization between fermions and trimer liquids in one of the intermediate phases.
Article
Physics, Mathematical
Andrea Grigoletto, Pavel Putrov
Summary: We study general fermionic quantum field theories with a global finite group symmetry G, focusing on the case of 2 dimensions and torus spacetime. The modular transformation properties of the partition functions are determined by the 't Hooft anomaly of G and fermion parity. For non-abelian G, the modular transformations can be directly determined from the corresponding 3D invertible topological quantum field theory (iTQFT) through inflow. We also explore the evaluation of the character map from the real representation ring of G to the group classifying anomalies.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Noam Schiller, Barak A. Katzir, Ady Stern, Erez Berg, Netanel H. Lindner, Yuval Oreg
Summary: A recent experimental work provided evidence for proximity-induced superconductivity in fractional quantum Hall edges, which is crucial for realizing parafermion zero modes. The experimental results showed a crossed Andreev reflection signal with a stronger probability for fractional quantum Hall edges compared to integer ones. The theoretical model explained these findings by considering the coupling between edge modes and normal states in Abrikosov vortices induced by the magnetic field.
Article
Physics, Multidisciplinary
Alexander Altland, Michael Fleischhauer, Sebastian Diehl
Summary: This study presents a complete symmetry classification of fermion matter in and out of thermal equilibrium, starting from the state transformations in fermionic Fock spaces and the invariance properties of the density matrix dynamical equation. The classification of generators of reversible dynamics, dissipation, and fluctuations in irreversible and interacting dynamical equations leads to a distinction between equilibrium and out-of-equilibrium symmetries, highlighting the role of time in each case. In the context of nonequilibrium quantum dynamics, a novel realization of antilinear symmetries is observed, fundamentally different from the rules of thermal equilibrium.
Article
Quantum Science & Technology
Sayan Jana, Anant V. Varma, Arijit Saha, Sourin Das
Summary: This study investigates the properties of states in a spinful Fermi sea by using the density matrix between two spin-1/2 degrees of freedom. It is found that in the case of spin degeneracy, the density matrix is always in a maximally mixed state, while in the finite distance, it conforms to a set of maximally entangled mixed state. When an external magnetic field is applied to lift the spin degeneracy, the entropy of the density matrix becomes a function of the distance between the two spins. Additionally, the entropy of the density matrix becomes a function of the chemical potential in the limit of infinite distance and saturates to the maximum allowed value only when the band is completely filled.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Physics, Nuclear
Elena Litvinova, Yinu Zhang
Summary: A consistent microscopic theory for the response of strongly coupled superfluid fermionic systems is formulated, focusing on quasiparticle-phonon coupling and its applications in nuclear structure studies, providing a new approach for calculations in nonspherical nuclei.
Article
Instruments & Instrumentation
Joseph Clement, Dustin Keller
Summary: This paper presents an analytical description of the spin energy levels responsible for the dynamics in the continuous wave NMR spectrum under selective radio frequency (RF) manipulation, as well as a new simplified analysis of the lineshape itself. These conditions can be used to measure the vector and tensor polarization in an RF-manipulated signal in real-time or to simulate the spin-1 NMR lineshape's response to locally applied RF irradiation. The analytical description of the RF-manipulated lineshape as well as the resulting simulations can be used to optimize the figure of merit in high-energy and nuclear scattering experiments using spin-1 solid-state targets.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Physics, Multidisciplinary
B. S. Hu, J. Padua-Arguelles, S. Leutheusser, T. Miyagi, S. R. Stroberg, J. D. Holt
Summary: This study presents converged ab initio calculations of structure factors for elastic spin-dependent WIMP scattering off various nuclei used in dark matter direct-detection searches, providing insights into WIMP-nucleon interactions and nuclear responses. The results are generally consistent with previous calculations, but significant uncertainties in I-127 underscore the need for further research.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Guglielmo M. Tino, Angelo Bassi, Giuseppe Bianco, Kai Bongs, Philippe Bouyer, Luigi Cacciapuoti, Salvatore Capozziello, Xuzong Chen, Maria L. Chiofalo, Andrei Derevianko, Wolfgang Ertmer, Naceur Gaaloul, Patrick Gill, Peter W. Graham, Jason M. Hogan, Luciano Iess, Mark A. Kasevich, Hidetoshi Katori, Carsten Klempt, Xuanhui Lu, Long-Sheng Ma, Holger Mueller, Nathan R. Newbury, Chris W. Oates, Achim Peters, Nicola Poli, Ernst M. Rasel, Gabriele Rosi, Albert Roura, Christophe Salomon, Stephan Schiller, Wolfgang Schleich, Dennis Schlippert, Florian Schreck, Christian Schubert, Fiodor Sorrentino, Uwe Sterr, Jan W. Thomsen, Giuseppe Vallone, Flavio Vetrano, Paolo Villoresi, Wolf von Klitzing, David Wilkowski, Peter Wolf, Jun Ye, Nan Yu, Mingsheng Zhan
EUROPEAN PHYSICAL JOURNAL D
(2019)
Article
Physics, Applied
Chun-Chia Chen, Shayne Bennetts, Rodrigo Gonzalez Escudero, Benjamin Pasquiou, Florian Schreck
PHYSICAL REVIEW APPLIED
(2019)
Article
Optics
I. H. A. Knottnerus, S. Pyatchenkov, O. Onishchenko, A. Urech, F. Schreck, G. A. Siviloglou
Article
Physics, Multidisciplinary
C. Ravensbergen, E. Soave, V Corre, M. Kreyer, B. Huang, E. Kirilov, R. Grimm
PHYSICAL REVIEW LETTERS
(2020)
Review
Physics, Multidisciplinary
Florian Schreck, Klaasjan van Druten
Summary: Laser cooling is a crucial initial step for achieving Bose-Einstein condensation and quantum degeneracy in atomic gases, bringing them close to absolute zero. Ongoing development in laser cooling methods has enabled more elements to reach quantum degeneracy, leading to new experimental opportunities. Improved techniques like reaching Bose-Einstein condensation purely through laser cooling and continuous condensation are opening up new avenues for creating quantum gases.
Article
Physics, Multidisciplinary
E. Soave, V Corre, C. Ravensbergen, J. H. Han, M. Kreyer, E. Kirilov, R. Grimm
Summary: We report on high-resolution Feshbach spectroscopy conducted on a degenerate, spin-polarized Fermi gas of Dy-161 atoms, measuring the losses from three-body recombination at a low magnetic field. Up to 44 resonance features were observed for magnetic field strengths of up to 1 G, with plateaus of very low losses. The dependence of the three-body recombination rate coefficient on magnetic resonance detuning and temperature was studied, revealing a strong suppression of losses with decreasing temperature even for small detunings from the resonance. Characterizing the complex behavior of three-body losses in fermionic Dy-161 is crucial for future applications in atomic quantum gas research.
UKRAINIAN JOURNAL OF PHYSICS
(2022)
Article
Optics
Zhu-Xiong Ye, Alberto Canali, Elisa Soave, Marian Kreyer, Yaakov Yudkin, Cornelis Ravensbergen, Emil Kirilov, Rudolf Grimm
Summary: In this work, we report the observation of Feshbach resonances at low magnetic-field strength in the Fermi-Fermi mixture of 161Dy and 40K. We characterized five resonances by measuring interspecies thermalization rates and molecular binding energies. One resonance at 7.29 G, which offers both accurate magnetic tunability and access to the universal regime, is highlighted as particularly interesting for future experiments. We demonstrate that optically trapped, resonantly interacting mixture can achieve lifetimes of a few hundred milliseconds. Additionally, we show the hydrodynamic expansion of the mixture in the strongly interacting regime and the formation of DyK Feshbach molecules. Our work opens up experimental possibilities for mass-imbalanced superfluids and related phenomena.
Review
Physics, Applied
Emanuele Pelucchi, Giorgos Fagas, Igor Aharonovich, Dirk Englund, Eden Figueroa, Qihuang Gong, Hubel Hannes, Jin Liu, Chao-Yang Lu, Nobuyuki Matsuda, Jian-Wei Pan, Florian Schreck, Fabio Sciarrino, Christine Silberhorn, Jianwei Wang, Klaus D. Jons
Summary: Photonics plays a crucial role in emerging quantum technologies, with its full potential being realized through miniaturization via on-chip integration. Integrated quantum photonics leverages classical integrated photonic technologies for quantum applications and focuses on developing quantum photonic integrated circuits. The Roadmap highlights the value that integrated photonics brings to quantum technologies through specific examples.
NATURE REVIEWS PHYSICS
(2022)
Article
Optics
Marian Kreyer, Jeong Ho Han, Cornelis Ravensbergen, Vincent Corre, Elisa Soave, Emil Kirilov, Rudolf Grimm
Summary: In this research, the anisotropic dynamical polarizability of Dy near the 626-nm intercombination line was measured using modulation spectroscopy in a one-dimensional optical lattice. By using K as a reference species, large systematic uncertainties resulting from limited knowledge of spatial intensity distribution were eliminated. The method extracted the scalar and tensorial parts of the polarizability by varying the laser polarization, and the natural linewidth was also derived. The results showed excellent agreement with literature values, and optical dipole trapping on the intercombination line was demonstrated, providing a tool for manipulating atoms in the Dy-K mixture.
Article
Physics, Multidisciplinary
Rodrigo Gonzalez Escudero, Chun-Chia Chen, Shayne Bennetts, Benjamin Pasquiou, Florian Schreck
Summary: A steady-stale magneto-optical trap (MOT) of fermionic strontium atoms operating on the 7.5-kHz-wide S-1(0) - P-3(1) transition is demonstrated. The MOT contains 8.4 x 10(7) atoms, a loading rate of 1.3 x 10(7) atoms/s, and an average temperature of 12 mu K, making it suitable as a source for continuous-wave superradiant lasers operating on strontium's clock transition. This development paves the way for continuous active optical clocks.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Optics
Aaron Merlin Mueller, Miklos Lajko, Florian Schreck, Frederic Mila, Jiri Minar
Summary: The study investigates species-selective cooling of a trapped SU(N) Fermi gas through entropy redistribution during adiabatic loading of an optical lattice, demonstrating improved cooling effects. Optimal performance is achieved when all atomic levels experience the same potential, outside of a specific dimple region. Specific quantitative discussions on achieving state-selective trapping in Sr-87 and Yb-173 using existing experimental techniques are provided.
Article
Optics
Isabella Fritsche, Cosetta Baroni, Erich Dobler, Emil Kirilov, Bo Huang, Rudolf Grimm, Georg M. Bruun, Pietro Massignan
Summary: In this experiment, the properties of a strongly interacting mixture of bosonic K-41 impurities in a Fermi sea of ultracold Li-6 atoms were investigated. By using radio-frequency injection spectroscopy and manipulating interspecies interactions with a Feshbach resonance, the researchers found that the energy of Fermi polarons was insensitive to impurity concentration. The breakdown of the Fermi polaron description was observed in the denser condensed fraction of the bosonic K-41 gas, where Bose polarons formed by Li-6 fermions were detected.
Article
Optics
M. Pini, P. Pieri, R. Grimm, G. Calvanese Strinati
Summary: A detailed description of the phase diagram for a two-component unitary Fermi gas with mass and population imbalance is provided, aiming to offer quantitative benchmarks for the normal-to-superfluid phase transition in a temperature-polarization parameter space of a mass-imbalanced Fermi gas. The self-consistent t-matrix approach is adopted, known for accurately describing the thermodynamic properties of unitary Fermi gas with mass and population balance. The results serve as a guideline for ongoing experiments on heteronuclear Fermi mixtures.
Correction
Optics
Cornelis Ravensbergen, Vincent Corre, Elisa Soave, Marian Kreyer, Emil Kirilov, Rudolf Grimm
Article
Optics
Chun-Chia Chen, Shayne Bennetts, Rodrigo Gonzalez Escudero, Florian Schreck, Benjamin Pasquiou
