Article
Physics, Multidisciplinary
Emanuele G. Dalla Torre, Matthew J. Reagor
Summary: Lasers and Bose-Einstein condensates exhibit macroscopic quantum coherence in different ways, with lasers having a defined global phase and fluctuating photon numbers, while BECs have a conserved number of particles and an undefined global phase. Researchers have created a unified framework connecting these two states using gate-based quantum circuits. By measuring the total number of particles without destroying coherence, they found that particle conservation enhances long-range phase coherence.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Ekaterina Aladinskaia, Roman Cherbunin, Evgeny Sedov, Alexey Liubomirov, Kirill Kavokin, Evgeny Khramtsov, Mikhail Petrov, P. G. Savvidis, Alexey Kavokin
Summary: This study investigates the formation of exciton-polariton condensates in potlike traps created by optical pumping in a planar microcavity with embedded quantum wells. The experiment reveals the discrete spectrum of polariton eigenstates and demonstrates the control of these states through manipulating the shape and size of the trap and the spatial density distribution of the exciton reservoir.
Article
Materials Science, Multidisciplinary
L. Pisani, P. Pieri, G. Calvanese Strinati
Summary: In this study, a systematic investigation is conducted on the two-particle reduced density matrix of a superfluid fermionic system undergoing the BCS-BEC crossover. The spatial dependence evolution of the reduced density matrix is obtained from a power law at low temperature to an exponential dependence at high temperature in the superfluid phase when the interparticle coupling spans the BCS-BEC crossover.
Article
Physics, Multidisciplinary
Jin-Ling Wang, Wen Wen, Ji Lin, Hui-Jun Li
Summary: We propose a scheme to generate and control supersonic shock waves in a non-resonantly incoherent pumped exciton-polariton condensate, and different types of shock waves can be generated by regulating the incoherent pump. The ranges of parameters about various shock waves are determined by the initial incidence function and the cross-interaction between the polariton condensate and the reservoir. Our proposal not only discusses the shock wave in the exciton-polariton condensate system with the repulsive self-interaction, but also finds the shock wave in the condensates system with attractive self-interaction.
CHINESE PHYSICS LETTERS
(2023)
Article
Optics
Samuel N. Alperin, Natalia G. Berloff
Summary: Researchers have found that the intrinsic particle flux in a photonic Bose-Einstein condensate can stabilize multiply charged vortex states and spontaneously form through dynamic symmetry breaking mechanisms during condensate formation. The vortex states are found to radiate acoustically at topologically quantized frequencies and are limited by a quantum Kelvin-Helmholtz instability. This represents a fundamental result in fluid dynamics for quantum photonic fluids.
Article
Optics
Safoura S. Mirkhalaf, Daniel Benedicto Orenes, Morgan W. Mitchell, Emilia Witkowska
Summary: The study shows that the estimation of the control parameter in a ferromagnetic Bose-Einstein condensate exhibits the same scaling beyond the standard quantum limit near critical points and away from critical points. Depletion of the m(f) = 0 Zeeman sublevel and transverse magnetization are identified as signals capable of saturating sensitivity scaling. The results suggest the feasibility of sub-standard quantum limit sensing in ferromagnetic condensates with current experimental capabilities.
Article
Optics
S. Matveenko, M. S. Bahovadinov, M. A. Baranov, G. Shlyapnikov
Summary: We discuss the finite-temperature damping of rotons in elongated Bose-condensed dipolar gases in the Thomas-Fermi regime in the tightly confined directions. The presence of multiple branches of excitations is crucial for the Landau damping and results in a significant increase in the damping rate. However, even rotons with energies close to the roton gap remain relatively stable in systems with a roton gap as small as 1 nK.
Article
Physics, Mathematical
Detlev Buchholz
Summary: Within the algebraic framework of canonical commutation relations in position space, long-range order between particles in bounded regions is established in states with a sufficiently large particle number. This order occurs when homogeneous proper (infinite) condensates form locally in the states as the density approaches infinity. The condensates are described by eigenstates of the momentum operator, including cases where they are streaming with a constant velocity. The presented arguments are model-independent and provide a new criterion for the occurrence of condensates, based on the characterization of regular and singular wave functions.
JOURNAL OF MATHEMATICAL PHYSICS
(2022)
Article
Optics
Ratheejit Ghosh, Chinmayee Mishra, Luis Santos, Rejish Nath
Summary: Gases of doubly dipolar particles, with both magnetic and electric dipole moments, offer intriguing novel possibilities. The interplay between doubly dipolar interactions, quantum stabilization, and external confinement results in a rich ground-state physics of supersolids and incoherent droplet arrays in doubly dipolar condensates. Our study reveals novel possibilities for engineering quantum droplets and droplet supersolids, including supersolid-supersolid transitions and the realization of supersolid arrays of pancake droplets.
Article
Mathematics, Applied
Ling-Zheng Meng, Yan-Hong Qin, Li-Chen Zhao
Summary: This paper investigates the properties and motion of vector solitons in Bose-Einstein condensates, exploring the nonintegrable cases of spin soliton solutions and their stability. The results show that these spin solitons are robust against spin-dependent interactions and noise, exhibiting features such as negative-positive mass transition, splitting, diffusion, and collisions.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2022)
Article
Physics, Multidisciplinary
Rajesh K. Malla, Vladimir Y. Chernyak, Chen Sun, Nikolai A. Sinitsyn
Summary: This article investigates a model describing the conversion between ultracold bosonic atoms and molecules through a stimulated reaction. By solving the model equations, the study finds a dynamic phase transition in the reaction efficiency dependent on the transition rate. For the process of molecular dissociation, if the atomic modes have a linear energy dispersion, the emerging phase may have a thermalized energy distribution of noninteracting bosons defined by the transition rate.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Matteo Bellitti, Garry Goldstein, Chris R. Laumann
Summary: Recent experimental progress has allowed the study of molecular superfluids (MSF) in thermal equilibrium, leading to investigations of their thermodynamic and dynamical responses. This review focuses on the theoretical understanding of the phase diagram and quasiparticle spectrum in both atomic superfluid (ASF) and MSF phases. The decay rates of the quasiparticles in these phases play a crucial role in microtrap tunneling experiments and can result in distinct features in the transmission spectrum of atoms passing through molecular clouds.
Article
Mechanics
Shan Zou, Wen-Kai Bai, Tao Yang, Wu-Ming Liu
Summary: The topological transition of vortex lines to vortex rings and hopfions was numerically investigated in trapped Bose-Einstein condensates. Nearly perfect vortex rings can be obtained by selecting suitable initial separations of vortex lines. The deformation of the formed rings depends on the initial separation of the lines.
Article
Mechanics
Ning Liu, Z. C. Tu
Summary: This paper investigates Bose polarons formed by the interaction between impurities and Bose-Einstein condensates. By deriving an effective Frohlich Hamiltonian and using variational methods, the relevant properties of Bose polarons are studied. It is found that the contribution of IS coupling to the ground state energy decreases to zero near the miscible-immiscible boundary, and an increase in IS coupling leads to a greater number of virtual phonons and a significant increase in the effective mass of Bose polarons.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Materials Science, Multidisciplinary
Hironobu Yoshida, Hosho Katsura
Summary: In this study, we investigate the generalization of eta-pairing states to N-particle systems in a chain of N-component fermions and demonstrate that these states are exact eigenstates of an extended SU(N) Hubbard model. We observe that the correlation behavior of these states differs qualitatively for even and odd N.
Article
Optics
J. R. Machacek, T. J. Gay, Stephen J. Buckman, Sean S. Hodgman
Summary: The production of a high-resolution electron beam using a Penning-Malmberg buffer-gas trap, or Surko trap, is described in this article. It achieves a high-flux beam with an energy width of approximately 30 meV (FWHM) and has a considerably higher production efficiency compared to a similar trap configuration for positrons. The article demonstrates the application potential of this beam in absolute scattering measurements and high-resolution electron spectroscopy.
EUROPEAN PHYSICAL JOURNAL D
(2022)
Article
Optics
B. M. Henson, K. F. Thomas, Z. Mehdi, T. G. Burnett, J. A. Ross, S. S. Hodgman, A. G. Truscott
Summary: This novel single-shot trap frequency measurement method can determine trap frequency with an accuracy of 39 ppm (16 mHz) in a single experimental realization, improving on the literature by a factor of three. Furthermore, by employing a reconstructive aliasing approach, the method can be applied to trap frequencies more than three times greater than the sampling frequency.
Article
Multidisciplinary Sciences
B. M. Henson, J. A. Ross, K. F. Thomas, C. N. Kuhn, D. K. Shin, S. S. Hodgman, Yong-Hui Zhang, Li-Yan Tang, G. W. F. Drake, A. T. Bondy, A. G. Truscott, K. G. H. Baldwin
Summary: Despite being extensively tested, recent atomic spectroscopy measurements have revealed small discrepancies between experiment and theory in quantum electrodynamics (QED). This study focuses on the tune-out frequency of helium and compares experimental results with new theoretical QED calculations, resolving both QED contributions and retardation corrections.
Correction
Multidisciplinary Sciences
M. Wurdack, E. Estrecho, S. Todd, T. Yun, M. Pieczarka, S. K. Earl, J. A. Davis, C. Schneider, A. G. Truscott, E. A. Ostrovskaya
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
J. A. Ross, P. Deuar, D. K. Shin, K. F. Thomas, B. M. Henson, S. S. Hodgman, A. G. Truscott
Summary: We present observations of the high momentum tail in expanding Bose-Einstein condensates of metastable Helium atoms, which support the idea that the tails originate from the in-situ quantum depletion prior to release. This observation contradicts the hydrodynamic theory and poses challenges in interpreting the stronger depleted tails in the far-field.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
Tinghe Yun, Eliezer Estrecho, Andrew G. Truscott, Elena A. Ostrovskaya, Matthias J. Wurdack
Summary: This study presents a scalable approach to fabricate high-quality planar microcavities with an integrated monolayer WS2 layer-by-layer using PMMA/SiOx as a cavity spacer. The microcavities demonstrated strong light-matter coupling at room temperature, making it an important step towards fabricating wafer-scale and patterned microcavities for engineering the exciton-polariton potential landscape.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
M. Wurdack, E. Estrecho, S. Todd, C. Schneider, A. G. Truscott, E. A. Ostrovskaya
Summary: This study demonstrates the trapping and manipulation of polaritons at room temperature in an optical microcavity by enhancing the interactions between materials. It has significant implications for polariton-based optoelectronics in the field of electronics.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Kieran F. Thomas, Bryce M. Henson, Yu Wang, Robert J. Lewis-Swan, Karen V. Kheruntsyan, Sean S. Hodgman, Andrew G. Truscott
Summary: We present an experimentally viable approach to demonstrate quantum non-locality in a matter-wave system using a Rarity-Tapster interferometer. The suitability of this method is quantified through theoretical discussion and experimental results. As a proof of concept, we demonstrate an interferometric visibility and Bell parameter between atoms separated by a certain distance, which is important for studying motion degrees of freedom and quantum effects in a gravitationally sensitive system.
EUROPEAN PHYSICAL JOURNAL D
(2022)
Article
Multidisciplinary Sciences
M. Wurdack, T. Yun, M. Katzer, A. G. Truscott, A. Knorr, M. Selig, E. A. Ostrovskaya, E. Estrecho
Summary: The authors demonstrate dissipative coupling between excitons and photons in optical microcavities, resulting in the creation of polaritons with a negative effective mass. This study introduces the concept of non-Hermitian dispersion engineering for exciton polaritons and shows direct measurements of anomalous dispersion in atomically thin crystals embedded in planar microcavities.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Liam A. Fuderer, Liangwei Wang, James S. Stuart, Morgan P. Hedges, Andrew G. Truscott, Sean S. Hodgman
Summary: This article presents a simple design for constructing an equivalent in-fibre Fabry-Perot interferometer (FPI) by splicing together two ports of a 99:1 in-fibre beamsplitter to form a fibre ring resonator (FRR). By heating a length of the fibre, the resonant frequency of the FPI can be scanned in a controllable manner primarily by changing the refractive index of the fibre. This design is suitable for applications where a standard Fabry-Perot cavity is used, particularly for laser mode monitoring.
Article
Materials Science, Multidisciplinary
M. Pieczarka, O. Bleu, E. Estrecho, M. Wurdack, M. Steger, D. W. Snoke, K. West, L. N. Pfeiffer, A. G. Truscott, E. A. Ostrovskaya, J. Levinsen, M. M. Parish
Summary: The authors develop a generalized version of Bogoliubov theory for a driven-dissipative exciton-polariton condensate with a large incoherent uncondensed component. They argue that the presence of an excitonic reservoir modifies the energy and amplitudes of the Bogoliubov quasiparticle excitations. The authors support their theoretical findings with experimental results.
