CMP Journal 2025-06-21
Statistics
Physical Review Letters: 21
Physical Review X: 2
Physical Review Letters
Essay: Emergent Holographic Spacetime from Quantum Information
Essay | Entanglement entropy | 2025-06-20 06:00 EDT
Tadashi Takayanagi
In a new forward-looking PRL Essay, Tadashi Takayanagi explores the intersection of quantum information theory with quantum gravity within the framework of holographic duality, and its potential to help us understand how time emerged during the Universe’s creation.
Phys. Rev. Lett. 134, 240001 (2025)
Entanglement entropy, Entanglement production, Holography, Quantum aspects of black holes, Quantum entanglement, Quantum gravity, Quantum information theory, Strings & branes, Spacetime symmetries, Field & string theory models & techniques, Tensor network methods
Roughening Dynamics of Interfaces in the Two-Dimensional Quantum Ising Model
Research article | Quantum simulation | 2025-06-20 06:00 EDT
Wladislaw Krinitsin, Niklas Tausendpfund, Matteo Rizzi, Markus Heyl, and Markus Schmitt
The properties of interfaces are key to understanding the physics of matter. However, the study of quantum interface dynamics has remained an outstanding challenge. Here, we use large-scale tree tensor network simulations to identify the dynamical signature of an interface roughening transition within the ferromagnetic phase of the 2D quantum Ising model. For initial domain wall profiles we find extended prethermal plateaus for smooth interfaces, whereas above the roughening transition the domain wall decays quickly. Our results can be readily explored experimentally in Rydberg atomic systems.
Phys. Rev. Lett. 134, 240402 (2025)
Quantum simulation, Quantum spin models, Ising model, Tensor network methods
Genuine Quantum Advantage in Anharmonic Bosonic Quantum Batteries
Research article | Bosons | 2025-06-20 06:00 EDT
Gian Marcello Andolina, Vittoria Stanzione, Vittorio Giovannetti, and Marco Polini
Finding a quantum battery model that displays a genuine quantum advantage, while being prone to experimental fabrication, is an extremely challenging task. In this Letter we propose a deceptively simple quantum battery model that displays a genuine quantum advantage, saturating the quantum speed limit. It consists of two harmonic oscillators (the charger and the battery), coupled during the charging dynamics by an anharmonic interaction. We first present the model, then certify the genuine quantum advantage, and finally briefly discuss how the battery can be fabricated through the use of superconducting circuits.
Phys. Rev. Lett. 134, 240403 (2025)
Bosons, Quantum harmonic oscillator, Thermodynamics
Self-Similar Phase Diagram of the Fibonacci-Driven Quantum Ising Model
Research article | Majorana bound states | 2025-06-20 06:00 EDT
Harald Schmid, Yang Peng, Gil Refael, and Felix von Oppen
We study a stroboscopic quantum Ising model with Fibonacci dynamics. We use its boundary spin correlation functions in long but finite chains to identify regions in the phase diagram which exhibit Majorana zero modes (MZM) as well as Majorana golden-ratio modes (MGM). We find that these regions evolve in a self-similar manner with increasing simulation time and identify the self-similarity transform which governs this evolution of the phase diagram. Integrability-breaking perturbations lead to a temporal decay of the boundary spin correlations, ultimately limiting the self-similarity of the phase diagram. Our predictions are testable with current quantum information processors.
Phys. Rev. Lett. 134, 240404 (2025)
Majorana bound states, Quantum circuits, Floquet systems, Ising model, Self-similarity
Entangled States from Sparsely Coupled Spins for Metrology with Neutral Atoms
Research article | Long-range interactions | 2025-06-20 06:00 EDT
Sridevi Kuriyattil, Pablo M. Poggi, Jonathan D. Pritchard, Johannes Kombe, and Andrew J. Daley
The generation of resource states for quantum-enhanced metrology from sparse coupling graphs is accomplished using fewer resources than known before.
Phys. Rev. Lett. 134, 240801 (2025)
Long-range interactions, Quantum metrology, Quantum simulation, Quantum many-body systems, Rydberg atoms & molecules
Ultrafast High-Fidelity State Readout of Single Neutral Atom
Research article | Cavity quantum electrodynamics | 2025-06-20 06:00 EDT
Jian Wang, Dong-Yu Huang, Xiao-Long Zhou, Ze-Min Shen, Si-Jian He, Qi-Yang Huang, Yi-Jia Liu, Chuan-Feng Li, and Guang-Can Guo
An atom’s quantum state can be determined quickly and accurately thanks to a strategy for making the atom brighter.
Phys. Rev. Lett. 134, 240802 (2025)
Cavity quantum electrodynamics, Quantum information with atoms & light, Ultrafast optics, Trapped atoms
Deterministic Generation of Frequency-Bin-Encoded Microwave Photons
Research article | Quantum communication | 2025-06-20 06:00 EDT
Jiaying Yang, Maryam Khanahmadi, Ingrid Strandberg, Akshay Gaikwad, Claudia Castillo-Moreno, Anton Frisk Kockum, Muhammad Asad Ullah, Göran Johansson, Axel Martin Eriksson, and Simone Gasparinetti
A distributed quantum computing network requires a quantum communication channel between spatially separated processing units. In superconducting circuits, such a channel can be implemented based on propagating microwave photons to encode and transfer quantum information between an emitter and a receiver. However, traveling microwave photons can be lost during the transmission, leading to the failure of information transfer. Heralding protocols can be used to detect such photon losses. In this Letter, we propose such a protocol and experimentally demonstrate a frequency-bin encoding method of microwave photonic modes using superconducting circuits. We deterministically encode the quantum information from a superconducting qubit by simultaneously emitting its information into two photonic modes at different frequencies, with a process fidelity of 94.9%. The frequency-bin-encoded photonic modes can be used, at the receiver processor, to detect the occurrence of photon loss. Our Letter thus provides a reliable method to implement high-fidelity quantum state transfer in a distributed quantum computing network, incorporating error detection to enhance performance and accuracy.
Phys. Rev. Lett. 134, 240803 (2025)
Quantum communication, Quantum information architectures & platforms, Quantum information processing, Quantum interconnects, Quantum state transfer
Axion Mass Prediction from Adaptive Mesh Refinement Cosmological Lattice Simulations
Research article | Cosmology | 2025-06-20 06:00 EDT
Joshua N. Benabou, Malte Buschmann, Joshua W. Foster, and Benjamin R. Safdi
The quantum chromodynamics (QCD) axion arises as the pseudo-Goldstone mode of a spontaneously broken Abelian Peccei-Quinn (PQ) symmetry. If the scale of PQ symmetry breaking occurs below the inflationary reheat temperature and the domain wall number is unity, then there is a unique axion mass that gives the observed dark matter (DM) abundance. Computing this mass has been the subject of intensive numerical simulations for decades since the mass prediction informs laboratory experiments. Axion strings develop below the PQ symmetry-breaking temperature, and as the string network evolves, it emits axions that go on to become the DM. A key ingredient in the axion mass prediction is the spectral index of axion radiation emitted by the axion strings. We compute this index in this Letter using the most precise and accurate large-scale simulations to date of the axion-string network leveraging adaptive mesh refinement to achieve the precision that would, otherwise, require a static lattice with 262,${144}^{3}$ lattice sites. We find a scale-invariant axion radiation spectrum to within 1% precision and find no evidence that the spectral index of radiation evolves with time. Accounting for axion production from strings prior to the QCD phase transition leads us to predict that the axion mass should be approximately ${m}_{a}\in (45,65)\text{ }\text{ }\mathrm{\mu }\mathrm{eV}$. However, we provide preliminary evidence that axions are produced in greater quantities from the string-domain-wall network collapse during the QCD phase transition, potentially increasing the mass prediction to as much as $300\text{ }\text{ }\mathrm{\mu }\mathrm{eV}$.
Phys. Rev. Lett. 134, 241003 (2025)
Cosmology, Axions, Direct numerical simulations
Cosmological Selection of a Small Weak Scale from Large Vacuum Energy: A Minimal Approach
Research article | Cosmology | 2025-06-20 06:00 EDT
Susobhan Chattopadhyay, Dibya S. Chattopadhyay, and Rick S. Gupta
We present a minimal cosmological solution to the hierarchy problem. Our model consists of a light pseudoscalar and an extra Higgs doublet in addition to the standard model field content. We consider a landscape of vacua with varying values of the electroweak vacuum expectation value (VEV). The vacuum energy in our model peaks in a region of the landscape where the electroweak VEV is nonzero and much smaller than the cutoff. During inflation, due to exponential expansion, such regions of the landscape with maximal vacuum energy dominate the universe in volume, thus explaining the observed smallness of the electroweak scale with respect to the cutoff. The pseudoscalar potential in our model is that of a completely generic pseudogoldstone boson—not requiring the clockwork mechanism—and its field value never exceeds its decay constant or the Planck scale. Our mechanism is robust to the variation of other model parameters in the landscape as the electroweak VEV is varied. It also predicts a precise and falsifiable relationship between the masses and couplings of the different Higgs boson mass eigenstates. Moreover, the pseudoscalar in our model can account for the observed dark matter relic density.
Phys. Rev. Lett. 134, 241803 (2025)
Cosmology, Electroweak interaction, Extensions of Higgs sector, Extensions of scalar sector, Hierarchy problem, Naturalness, Particle dark matter, Phenomenology
Next-to-Leading-Order Prediction for the Neutrinoless Double-Beta Decay
Research article | Effective field theory | 2025-06-20 06:00 EDT
Y. L. Yang and P. W. Zhao
The neutrinoless double-beta decay ($0\nu \beta \beta $) of two neutrons $nn\rightarrow ppee$ is the elementary subprocess of $0\nu \beta \beta $ decay in nuclei. Accurate knowledge of the $nn\rightarrow ppee$ amplitude is required to pin down the short-range contributions in the nuclear matrix elements of the candidate nuclei for large-scale $0\nu \beta \beta $ searches. In this Letter, we report the first next-to-leading-order prediction of the $nn\rightarrow ppee$ amplitude, with Bayesian uncertainty quantification. This is made possible by the development of the relativistic chiral effective field theory, in which no unknown contact term is required up to next-to-leading order. The theory is validated by reproducing in a parameter-free way the available data on the charge independence and charge symmetry breaking contributions in the two-nucleon scattering. The present work makes an essential step toward addressing the uncertainty in the theoretical calculations of the nuclear matrix elements relevant for $0\nu \beta \beta $ searches.
Phys. Rev. Lett. 134, 242502 (2025)
Effective field theory, Neutrinoless double beta decay, Nuclear tests of fundamental interactions
Time-Resolved Spectral Diffusion of a Multimode Mechanical Memory
Research article | Optomechanics | 2025-06-20 06:00 EDT
Niccolò Fiaschi, Lorenzo Scarpelli, Alexander Rolf Korsch, Amirparsa Zivari, and Simon Gröblacher
High-frequency phonons hold great promise as carriers of quantum information on chip and as quantum memories. Because of their coherent interaction with several systems, their compact mode volume, and slow group velocity, multiple experiments have recently demonstrated coherent transport of information on chip using phonon modes, interconnecting distinct quantum devices. Strongly confined phonons in waveguidelike geometries are particularly interesting because of their long lifetime. However, spectral diffusion has been observed to substantially limit their coherence times [S. M. Meenehan et al., Silicon optomechanical crystal resonator at millikelvin temperatures, Phys. Rev. A 90, 011803(R) (2014), A. Wallucks et al., A quantum memory at telecom wavelengths, Nat. Phys. 16, 772 (2020), and G. S. MacCabe et al., Nano-acoustic resonator with ultralong phonon lifetime, Science 370, 840 (2020)]. Coupling to two-level systems is suspected to be a major contributor to the diffusion; however, to date, the origin and underlying mechanisms are still not fully understood. Here, we perform a time-domain study on two adjacent mechanical modes (separated by around 5 MHz) and show that the frequency positions of the two modes are not correlated in time, in agreement with our theoretical model and Monte Carlo simulations. This result is an important step in fully understanding the microscopic mechanisms of dephasing in mechanical quantum buses and memories.
Phys. Rev. Lett. 134, 243604 (2025)
Optomechanics, Quantum coherence & coherence measures, Quantum memories, Quantum optics
Robust Purcell Effect of ${\mathrm{CsPbI}}_{3}$ Quantum Dots Using Nonlocal Plasmonic Metasurfaces
Research article | Light-matter interaction | 2025-06-20 06:00 EDT
Yu Yuan, Chenjiang Qian, Longlong Yang, Xue-Chen Ru, Yaolong Li, Jingnan Yang, Bowen Fu, Sai Yan, Hancong Li, Zhanchun Zuo, Can Wang, Xiaoyong Hu, Hong-Bin Yao, Kuijuan Jin, Qihuang Gong, and Xiulai Xu
A hybrid plasmonic-photonic metasurface supports nonlocal topological modes, offering stable light-matter interaction for quantum photonics.
Phys. Rev. Lett. 134, 243804 (2025)
Light-matter interaction, Metamaterials, Plasmonics, Nonlocal nonlinear media, Quantum dots, Optical spectroscopy, Photoluminescence
Nonlinear Non-Hermitian Skin Effect and Skin Solitons in Temporal Photonic Feedforward Lattices
Research article | Nonlinear optics | 2025-06-20 06:00 EDT
Shulin Wang, Bing Wang, Chenyu Liu, Chengzhi Qin, Lange Zhao, Weiwei Liu, Stefano Longhi, and Peixiang Lu
A concept based on an exotic effect in periodic structures may be useful for developing future photonic devices.
Phys. Rev. Lett. 134, 243805 (2025)
Nonlinear optics, Optical fibers, Optical solitons, Topological effects in photonic systems, Non-Hermitian systems
Kolmogorov Scaling in Bubble-Induced Turbulence
Research article | Bubble dynamics | 2025-06-20 06:00 EDT
Tian Ma, Shiyong Tan, Rui Ni, Hendrik Hessenkemper, and Andrew D. Bragg
Experiments using 3D Lagrangian tracking are used to investigate Kolmogorov scaling below the bubble size in bubble-induced turbulence (BIT). Second- and third-order structure functions reveal approximate Kolmogorov scaling for homogeneous bubble swarms. A new scaling for the kinetic energy dissipation rate is derived and shown to be in excellent agreement with the data. Using this we predict the scale separation below the bubble size as a function of the parameters and find that a large inertial range is not possible in BIT since bubbles of the required size would quickly break down.
Phys. Rev. Lett. 134, 244001 (2025)
Bubble dynamics, Turbulence, Turbulent multiphase flows
Neural Canonical Transformations for Quantum Anharmonic Solids of Lithium
Research article | Anharmonic lattice dynamics | 2025-06-20 06:00 EDT
Qi Zhang, Xiaoyang Wang, Rong Shi, Xinguo Ren, Han Wang, and Lei Wang
Lithium is a typical quantum solid, characterized by cubic structures at ambient pressure. As the pressure increases, it forms more complex structures and undergoes a metal-to-semiconductor transformation, complicating theoretical and experimental analyses. We employ the neural canonical transformation approach, a variational method based on probabilistic generative models, to investigate the quantum anharmonic effects in lithium solids at finite temperatures. This approach combines a normalizing flow for phonon excited-state wave functions with a probabilistic model for the occupation of energy levels, optimized jointly to minimize the free energy. Our results indicate that quantum anharmonicity lowers the bcc-fcc transition temperature compared to classical molecular dynamics predictions. At high pressures, the predicted fractional coordinates of lithium atoms in the cI16 structure show good quantitative agreement with experimental observations. Finally, contrary to previous beliefs, we find that the poor metallic oC88 structure is stabilized by the potential energy surface obtained via high-accuracy electronic structure calculations, rather than thermal or quantum effects.
Phys. Rev. Lett. 134, 246101 (2025)
Anharmonic lattice dynamics, Quantum crystals, Machine learning
Quantum Disorder Induced by Nuclear Tunneling in Lattice
Research article | Lattice dynamics | 2025-06-20 06:00 EDT
Yu-Cheng Zhu, Jia-Xi Zeng, Qi-Jun Ye, and Xin-Zheng Li
Lattice degrees of freedom (d.o.f.) may induce quantum disorder (QD) when nuclear tunneling outvies long-range order, but conventional phonon theory is incapable of describing such QD phases. Here we develop a method based on path-integral molecular dynamics to solve this problem. Its accuracy is verified in a double-well chain model and it is applied to a real material from first principles. A quantum order-disorder-order phase transition sequence is demonstrated when varying the strength of quantum fluctuations using the lattice constants as the tuning factor. Combining the excitation spectra and R'enyi entanglement entropy, we pinpoint the QD region. This picture may be general in lattice systems having soft phonon modes, not limited to quantum paraelectricity, in which novel entangled lattice motion and its coupling with other d.o.f. can be expected.
Phys. Rev. Lett. 134, 246401 (2025)
Lattice dynamics, Phonons, First-principles calculations, Machine learning, Many-body techniques, Molecular dynamics, Path integrals
Movable Dirac Points with Ferroelectrics: Kink States and Berry Curvature Dipoles
Research article | Ferroelectric domains | 2025-06-20 06:00 EDT
Konstantin S. Denisov, Yuntian Liu, and Igor Žutić
Two-dimensional (2D) Dirac states and Dirac points with linear dispersion are the hallmark of graphene, topological insulators, semimetals, and superconductors. Lowering a symmetry by the ferroelectric polarization opens the gap in Dirac points and introduces finite Berry curvature. Combining this with Dirac points detached from high symmetry points of the Brillouin zone offers additional ways to tailor topological properties. We explore this concept by studying topological phenomena emerging in 2D materials with movable Dirac points and broken out-of-plane mirror reflection. The resulting topological kink states and Berry curvature dipoles are changed by movable 2D Dirac points with experimental signatures in electrical conductance and second-harmonic nonlinear Hall conductivity. We identify materials platforms where our predictions can be realized and support that with the first-principles results for ${\mathrm{Cl}}{2}{\mathrm{Rh}}{2}{\mathrm{S}}_{2}$-GeS junction.
Phys. Rev. Lett. 134, 246602 (2025)
Ferroelectric domains, Second order nonlinear optical processes, Symmetry protected topological states, Topological materials, Valley degrees of freedom, 2-dimensional systems, Dirac semimetal, Ferroelectrics
Tunneling Magnetoresistance in Altermagnetic ${\mathrm{RuO}}_{2}$-Based Magnetic Tunnel Junctions
Research article | Magnetic order | 2025-06-20 06:00 EDT
Seunghyeon Noh, Gye-Hyeon Kim, Jiyeon Lee, Hyeonjung Jung, Uihyeon Seo, Gimok So, Jaebyeong Lee, Seunghyun Lee, Miju Park, Seungmin Yang, Yoon Seok Oh, Hosub Jin, Changhee Sohn, and Jung-Woo Yoo
Altermagnets exhibit characteristics akin to antiferromagnets, with spin-split anisotropic bands in momentum space. ${\mathrm{RuO}}{2}$ has been considered as a prototype altermagnet; however, recent reports have questioned altermagnetic ground state in this material. In this Letter, we demonstrate spin-dependent tunneling magnetoresistance (TMR) in ${\mathrm{RuO}}{2}$-based magnetic tunnel junctions, which suggests the spin-splitted anisotropic band structure of our ${\mathrm{RuO}}{2}$ films. The observed TMR is contingent on the direction of the N'eel vector of ${\mathrm{RuO}}{2}$ and reverse its sign by the inversion of the N'eel vector. These results reflect the altermagnetic nature of ${\mathrm{RuO}}_{2}$ and highlight its potential for spintronic applications, leveraging the combined strengths of ferromagnetic and antiferromagnetic systems.
Phys. Rev. Lett. 134, 246703 (2025)
Magnetic order, Magnetotransport, Spintronics, Altermagnets, X-ray diffraction
Electrically Controlled Nonlinear Magnon-Magnon Coupling in a Synthetic Antiferromagnet
Research article | Magnetic coupling | 2025-06-20 06:00 EDT
A. Sud, K. Yamamoto, S. Iihama, K. Ishibashi, S. Fukami, H. Kurebayashi, and S. Mizukami
Applying a strong enough radio frequency current to a synthetic antiferromagnet leads to nonlinear magnon-magnon coupling and Rabi-like splitting of the signal while preserving the symmetries of the system.
Phys. Rev. Lett. 134, 246704 (2025)
Magnetic coupling, Magnetic interactions, Magnetization dynamics, Magnons, Room temperature RF, Spin dynamics, Synthetic antiferromagnetic multilayers, Ferromagnetic resonance
Scaling Law for Epithelial Tissue Rheology
Research article | Developmental biology | 2025-06-20 06:00 EDT
M. I. Cheikh, N. Rodriguez, and K. Doubrovinski
Epithelial morphogenesis is a process through which simple cellular sheets are shaped into complex tissues and organs in a developing animal. From a physics perspective, understanding any shape change requires knowing the active forces driving its dynamics, as well as the material properties, i.e., the rheology, of the material that is undergoing the deformation. Despite a long-standing effort, rheological properties of embryonic tissues have remained elusive. Here, we develop a minimal theory providing a comprehensive explanation of rheological measurements characterizing the mechanics of epithelia in the early fly embryo. Our theory explains a key experimental observation: when subjected to concentrated pulling force, the embryonic epithelium of the fruit fly Drosophila melanogaster deforms following a power law with an exponent of $1/2$. All dimensional parameters of our theory are constrained by direct measurements and have allowed us to estimate the spring constant of an individual cellular edge. We show that stress relaxation (attributable to actin turnover), stretching elasticity of individual cellular edges, and the floppy topology of the cellular network are the sole physical properties governing tissue rheology on the developmentally relevant time scale of 1–10 minutes.
Phys. Rev. Lett. 134, 248401 (2025)
Developmental biology, Mechanobiology, Processes in cells, tissues & organoids
Erratum: Observation of Oriented Landau Levels and Helical Zero Modes in Berry Dipole Acoustic Crystals [Phys. Rev. Lett. 134, 116604 (2025)]
| 2025-06-20 06:00 EDT
Qingyang Mo, Riyi Zheng, Cuicui Lu, Xueqin Huang, Zhengyou Liu, and Shuang Zhang
Phys. Rev. Lett. 134, 249901 (2025)
Physical Review X
Allosteric Lever: Toward a Principle of Specific Allosteric Response
Research article | Biomolecular processes | 2025-06-20 06:00 EDT
Maximilian Vossel, Bert L. de Groot, and Aljaž Godec
Allosteric proteins transmit signals through a nonlinear coupling between localized stiffness and soft deformations, revealing a conserved, lever-like mechanism behind long-range molecular communication.
Phys. Rev. X 15, 021097 (2025)
Biomolecular processes, Mechanical deformation, Mechanobiology, Molecular evolution, Protein dynamics, structure & function, Mechanical metamaterials, Protein interaction networks, Stimuli-responsive materials
Observation of a Halo Trimer in an Ultracold Bose-Fermi Mixture
Research article | Bose-Fermi mixtures | 2025-06-20 06:00 EDT
Alexander Y. Chuang, Huan Q. Bui, Arthur Christianen, Yiming Zhang, Yiqi Ni, Denise Ahmed-Braun, Carsten Robens, and Martin Zwierlein
The observation of a novel type of halo trimer–a three-particle molecule the size of a bacterium–in a mixture of ultracold atoms opens new avenues in few-body quantum physics.
Phys. Rev. X 15, 021098 (2025)
Bose-Fermi mixtures, Cold and ultracold molecules, Ultracold gases