Article
Optics
Aitor Alana, Nicolo Antolini, Giulio Biagioni, Inigo L. Egusquiza, Michele Modugno
Summary: We provide a theoretical characterization of the dynamical crossing of the superfluid-supersolid phase transition for a dipolar condensate confined in an elongated trap, and analyze the effects of the interparticle scattering length and ramp velocity on the collective excitations of the system. The results show that the strength of the transverse confinement and the continuity of the transition have a significant impact on the excitation behavior of the system.
Article
Physics, Multidisciplinary
Chang Woo Myung, Barak Hirshberg, Michele Parrinello
Summary: This study reports computational evidence of a supersolid phase of deuterium under high pressure and low temperature. The researchers observed a highly concerted exchange of atoms while the system maintained its crystalline order, and the Bose-Einstein condensation phenomenon was observed. This study provides concrete evidence for the existence of a supersolid phase in high-pressure deuterium and could contribute to future investigations of supersolid phases in real materials.
PHYSICAL REVIEW LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Jiaxin Zhao, Antonio Fieramosca, Ruiqi Bao, Wei Du, Kevin Dini, Rui Su, Jiangang Feng, Yuan Luo, Daniele Sanvitto, Timothy C. H. Liew, Qihua Xiong
Summary: Researchers have observed nonlinear optical parametric polaritons in a WS2 monolayer microcavity, which opens up new possibilities for the development of all-optical valley polariton nonlinear devices.
NATURE NANOTECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Mengjie Wei, Wouter Verstraelen, Konstantinos Orfanakis, Arvydas Ruseckas, Timothy C. H. Liew, Ifor D. W. Samuel, Graham A. Turnbull, Hamid Ohadi
Summary: The authors demonstrate the on-the-fly reconfigurable optical trapping of organic polariton condensates, which are delocalized over a macroscopic distance from the excitation region. This study holds great potential for future research on polaritonic lattice physics.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Maximilian Sohmen, Claudia Politi, Lauritz Klaus, Lauriane Chomaz, Manfred J. Mark, Matthew A. Norcia, Francesca Ferlaino
Summary: In this study, the finite-temperature properties of dipolar supersolids formed by cooling through direct evaporation were explored. The research revealed that as the atomic system cools towards quantum degeneracy, it transitions from a thermal gas to a crystalline state with periodic density modulation, followed by a transition to a supersolid state with long-range phase coherence.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Andrew Eberhardt, Michael Kopp, Alvaro Zamora, Tom Abel
Summary: The numerical method and PYTHON package CHiMES introduces a second order extension of classical field approach to accurately simulate quantum systems initially well approximated by mean field theory. The success of this method depends on two conditions: the quantum system must be well described by classical theory initially, and the growth of the higher order moments must be hierarchical.
Article
Multidisciplinary Sciences
Hangyong Shan, Lukas Lackner, Bo Han, Evgeny Sedov, Christoph Rupprecht, Heiko Knopf, Falk Eilenberger, Johannes Beierlein, Nils Kunte, Martin Esmann, Kentaro Yumigeta, Kenji Watanabe, Takashi Taniguchi, Sebastian Klembt, Sven Hoefling, Alexey Kavokin, Sefaattin Tongay, Christian Schneider, Carlos Anton-Solanas
Summary: The study demonstrates a strong light-matter coupling regime between microcavity photons and excitons in an atomically thin WSe2. Coherence buildup is accompanied by a threshold-like behavior in the emitted light intensity, characteristic of a polariton laser effect. Valley physics is also evident in the manipulation of polaritons via the valley-Zeeman effect in the presence of an external magnetic field.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Jake A. P. Glidden, Christoph Eigen, Lena H. Dogra, Timon A. Hilker, Robert P. Smith, Zoran Hadzibabic
Summary: Understanding and classifying non-equilibrium many-body phenomena analogously to the classification of equilibrium states of matter into universality classes is an outstanding problem in physics. Recent theoretical work and experimental evidence suggest that isolated many-body systems far from equilibrium exhibit dynamic self-similar scaling, implying the existence of a far-from-equilibrium universality class. The observation of bidirectional dynamic scaling in an isolated quench-cooled atomic Bose gas highlights the self-similar transport behavior in momentum space, independent of interparticle interactions.
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
Physics, Applied
Wenyu Xing, Ranran Cai, Kodai Moriyama, Kensuke Nara, Yunyan Yao, Weiliang Qiao, Kazuyoshi Yoshimura, Wei Han
Summary: This paper reports the study of the spin Seebeck effect (SSE) in single crystalline Pb2V3O9 and finds a strong correlation between the temperature-dependent critical magnetic fields and the Bose-Einstein condensation phase of the quantum magnet Pb2V3O9. This shows the potential of using spin current as a probe to study the spin correlation and phase transition properties in quantum magnets.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Minseong Lee, Rico Schoenemann, Hao Zhang, David Dahlbom, Tae-Hwan Jang, Seung-Hwan Do, Andrew D. Christianson, Sang-Wook Cheong, Jae-Hoon Park, Eric Brosha, Marcelo Jaime, Kipton Barros, Cristian D. Batista, Vivien S. Zapf
Summary: We conducted a high-field study on the S = 2 quantum magnet Ba2FeSi2O7, which has a strongly anisotropic easy-plane square lattice. By observing the spin level crossing and magnetic field-induced spin level crossing, we studied the interplay between spin level crossings and antiferromagnetic order in this high-spin antiferromagnetic system. We determined the phase boundaries and spin level crossings using various measurements and calculations, and discovered the multiferroic behavior of magnetically induced electric polarization.
Article
Materials Science, Multidisciplinary
S. Mukherjee, V. K. Kozin, A. Nalitov, I. A. Shelykh, Z. Sun, D. M. Myers, B. Ozden, J. Beaumariage, M. Steger, L. N. Pfeiffer, K. West, D. W. Snoke
Summary: The study focused on the effect of pseudomagnetic field on a polariton condensate in a ring-shaped microcavity, resulting in a stable four-leaf pattern. The pattern was found to originate from the interaction of cavity potential, energy relaxation, and TE-TM splitting. Comparisons with the dissipative one-dimensional spinor Gross-Pitaevskii equation with the TE-TM splitting energy showed good qualitative agreement.
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
Optics
Yan-Peng Bai, Jing-Lun Li, Gao-Ren Wang, Zhong-Bo Chen, Bo-Wen Si, Shu-Lin Cong
Summary: This study presents a simple theoretical model that describes the suppressing reactivity of an ultracold Fermi molecular gas in a degenerate regime using the statistical potential. The model successfully reproduces the experimentally observed suppression of the chemical reaction rate and intuitively captures the strength of spatial correlation through the statistical potential.
Article
Optics
J. Smits, H. T. C. Stoof, P. van der Straten
Summary: This study presents the observation and analysis of a spontaneously broken discrete time-translation symmetry in a driven system, showing a 50-50 split between two stable and temporal-distinct solutions. The experiment allows for further exploration of symmetry breaking in the discrete time crystal and for engineering excitations in space and time in the quantum domain.
Article
Materials Science, Multidisciplinary
K. V. Germash, D. V. Fil
Article
Physics, Applied
D. V. Fil, S. I. Shevchenko
LOW TEMPERATURE PHYSICS
(2016)
Article
Physics, Multidisciplinary
K. V. Germash, D. V. Fil
Article
Physics, Applied
L. Yu Kravchenko, D. V. Fil
JOURNAL OF APPLIED PHYSICS
(2018)
Review
Physics, Applied
D. V. Fil, S. I. Shevchenko
LOW TEMPERATURE PHYSICS
(2018)
Article
Physics, Applied
D. V. Fil, S. I. Shevchenko
LOW TEMPERATURE PHYSICS
(2020)
Article
Physics, Applied
D. V. Fil, S. I. Shevchenko
LOW TEMPERATURE PHYSICS
(2020)
Editorial Material
Physics, Applied
D. V. Fil, S. I. Shevchenko
LOW TEMPERATURE PHYSICS
(2020)
Review
Physics, Applied
D. V. Fil, S. I. Shevchenko
Summary: This paper reviews the main achievements of theoretical and experimental studies on the dislocation-induced supersolid state of He-4 and presents the current understanding of this phenomenon.
LOW TEMPERATURE PHYSICS
(2022)
Article
Physics, Applied
I. V. Bilych, K. R. Zhekov, T. N. Haidamak, G. A. Zvyagina, D. V. Fil, V. D. Fil
Summary: The mechanisms of magnetoelastic interaction in MnF2 were studied using the method of acoustoelectric transformation. The temperature dependence of the piezomagnetic coupling coefficient and its anisotropy were determined in the antiferromagnetic phase. A new effect was observed, where a non-diagonal component of the magnetic susceptibility tensor appeared under the action of the shear wave. A phenomenological interpretation was presented, considering a small-angle rotation of the crystal lattice. In the paramagnetic state, the effect of acoustic deformation was reduced to the modulation of the diagonal component of the susceptibility tensor.
LOW TEMPERATURE PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
V. D. Fil, D. Fil, G. A. Zvyagina, K. R. Zhekov, I. Bilych, D. A. Chareev, M. P. Kolodyazhnaya, A. Bludov, E. Nazarova
Summary: Experiments on FeSe-based superconducting compounds reveal the manifestation of piezomagnetism, indicating a hidden magnetic order and broken time-reversal symmetry in the family of superconducting chalcogenides. The anisotropy of piezomagnetic response suggests that the crystal structure of these compounds belongs to the trigonal syngony in the low-temperature phase.
Article
Materials Science, Multidisciplinary
D. Fil, S. Shevchenko
Summary: The study investigates stationary waves in the condensate of electron-hole pairs in the n-p bilayer system, showing the transition from a uniform to a nonuniform state. The appearance of a roton-type minimum in the collective mode spectrum is a precursor to this transition. The stationary wave pattern is greatly influenced by variations in condensate density and flow velocity, with short-wave modes dominating in the presence of a point obstacle and long-wave modes evident in the presence of a weak extended obstacle resembling ship wave patterns.
Article
Physics, Multidisciplinary
L. Yu Kravchenko, D. Fil
PHYSICAL REVIEW RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
K. Germash, D. Fil
Article
Materials Science, Multidisciplinary
K. V. Germash, D. V. Fil