Article
Physics, Multidisciplinary
Karol Gietka, Farokh Mivehvar, Thomas Busch
Summary: A novel composite light-matter magnetometer is proposed, using a multi-component Bose-Einstein condensate coupled to two distinct electromagnetic modes of a linear cavity for magnetic field measurement. The sensitivity of this magnetometer exhibits Heisenberg-like scaling with respect to the atom number, with a calculated lower bound for sensitivity at the order of fT (root Hz(-1))(-1) -pT (root Hz)(-1) for a condensate of 10(4) atoms with coherence times on the order of several ms under state-of-the-art experimental parameters.
NEW JOURNAL OF PHYSICS
(2021)
Article
Optics
A. D. Garcia-Orozco, L. Madeira, M. A. Moreno-Armijos, A. R. Fritsch, P. E. S. Tavares, P. C. M. Castilho, A. Cidrim, G. Roati, V. S. Bagnato
Summary: We studied the emergence of universal scaling in the time-evolving momentum distribution of a harmonically trapped three-dimensional Bose-Einstein condensate, which was parametrically driven to a turbulent state. We found that the out-of-equilibrium dynamics post excitation can be described by a single function due to nearby nonthermal fixed points. The observed behavior connects the dynamics of a quantum turbulent state to several far-from-equilibrium phenomena.
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
S. Baryshev, A. Zasedatelev, H. Sigurdsson, I Gnusov, J. D. Topfer, A. Askitopoulos, P. G. Lagoudakis
Summary: In this study, we conducted full polarization tomography on photon correlations in a spinor exciton-polariton condensate. Our measurements demonstrate the different forms of condensate pseudospin mean-field dynamics and their intrinsic relation to the condensate photon statistics.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Silvana Palacios Alvarez, Pau Gomez, Simon Coop, Roberto Zamora-Zamora, Chiara Mazzinghi, Morgan W. Mitchell
Summary: We present a magnetic sensor with extremely high energy resolution, applied in the detection of Rb-87 single-domain spinor Bose-Einstein condensates. By utilizing nondestructive Faraday rotation probing, we have achieved a low-frequency magnetic sensitivity of 72(8) fT, and measured the volume, spin coherence time, and readout noise of the condensate experimentally.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Mathematics, Interdisciplinary Applications
Mikhail N. Smolyakov
Summary: In this paper, quantization of a weakly nonideal Bose gas at zero temperature is performed along the lines of the well-known Bogolyubov approach. By introducing nonoscillation modes and calculating nonlinear corrections, the analysis successfully recovers canonical commutation relations and solves the issue of nonconserved particle number at least in the case of free quasi-particles.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Optics
M. Miskeen Khan, H. Tercas, J. T. Mendonca, J. Wehr, C. Charalambous, M. Lewenstein, M. A. Garcia-March
Summary: The study investigates the quantum motion of an impurity atom in a Bose-Einstein condensate in arbitrary dimensions, showing superdiffusive behavior, dimension-dependent average energy, and non-Markovianity of particle motion. Trapped impurity atoms exhibit stronger position squeezing in lower dimensions.
Article
Optics
Yuhang Nie, Jun-Hui Zheng, Tao Yang
Summary: In this article, we investigate the Bogoliubov excitation spectrum of quantum droplets in an optical lattice and classify the collective excitations into different modes. The oscillation frequencies and phononic modes of the droplets are measured through experimental measurements. Furthermore, the instability caused by density fluctuations and the critical filling of atoms are discussed. This work is essential for understanding the superfluid nature of quantum droplets in an optical lattice.
Article
Physics, Multidisciplinary
Hagai Edri, Boaz Raz, Gavriel Fleurov, Roee Ozeri, Nir Davidson
Summary: We studied the evolution of a Bose-Einstein condensate in a two-state superposition and successfully decoupled the system from strong magnetic noises. Our results show the impact of inter-state interactions on general superposition states and demonstrate squeezing of Gaussian noise using nonlinear spin dynamics. The scheme can be used for spin-squeezing beyond the standard quantum limit and observing polaron physics.
NEW JOURNAL OF PHYSICS
(2021)
Article
Optics
Boyao Li, Xingjie Wang, Yaoyao Liang, Jinghua Sun, Sufang Zhu, Xiaoyong Chen, Guiyao Zhou
Summary: This study reports the generation of vectorial solitons in a single cavity induced by dual-core fiber assisted ultrafast fiber lasers. It was found that four-component polarized rotation vector solitons (PRVS) are generated using the dispersive Fourier transformation technique. Furthermore, by controlling the soliton phase offset in dual-core fiber, the soliton rain state of multi pulse evolution can be obtained.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Ralf Wanzenboeck, Stefan Donsa, Harald Hofstaetter, Othmar Koch, Peter Schlagheck, Iva Brezinova
Summary: The study investigates the chaos phenomenon in the mean-field limit of a bosonic quantum many-body system, demonstrating that the system rapidly loses coherence with a rate determined by the Lyapunov exponent, which in turn affects the visibility of interference fringes.
Article
Physics, Fluids & Plasmas
L. G. F. Soares, F. Haas
Summary: An antiproton plasma confined in a quasi-1D device is described using a variational approach with self-consistent fluid formulation, while retaining thermal and Coulomb effects with the use of time-dependent variational method. Certain assumptions are made for number density and fluid velocity fields, simplifying the problem to ordinary nonlinear differential equations. Numerical simulations of the nonlinear dynamics for realistic parameters are performed, with adiabatic cooling and assumption of adiabatic equation of state for closure.
PHYSICS OF PLASMAS
(2021)
Article
Physics, Multidisciplinary
Timon A. Hilker, Lena H. Dogra, Christoph Eigen, Robert P. Smith, Zoran Hadzibabic
Summary: The two sounds in a highly compressible fluid are investigated using an ultracold Bose gas. The results show that only one sound persists at different temperatures, which is consistent with the hydrodynamic theory.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Alessandro Fabbri, Roberto Balbinot
Summary: This study presents a simple model to describe the formation of an acoustic black hole in a Bose-Einstein condensate, allowing for analytical computation of the evolution of the corresponding density-density correlator over time. The emergence of analog Hawking radiation is observed from a quantum atmosphere region significantly displaced from the horizon, and is quantitatively studied at T = 0 and also in the presence of an initial temperature T as commonly found in experiments.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Nathan M. Myers, Francisco J. Pena, Oscar Negrete, Patricio Vargas, Gabriele De Chiara, Sebastian Deffner
Summary: The study shows that using a Bose gas as the working medium, the engine performs best in the BEC phase state, with enhanced power output and higher efficiency at maximum power.
NEW JOURNAL OF PHYSICS
(2022)
Article
Instruments & Instrumentation
F. Riedel, A. Al-Masoudi, E. Benkler, S. Doerscher, V Gerginov, C. Grebing, S. Haefner, N. Huntemann, B. Lipphardt, C. Lisdat, E. Peik, D. Piester, C. Sanner, C. Tamm, S. Weyers, H. Denker, L. Timmen, C. Voigt, D. Calonico, G. Cerretto, G. A. Costanzo, F. Levi, I Sesia, J. Achkar, J. Guena, M. Abgrall, D. Rovera, B. Chupin, C. Shi, S. Bilicki, E. Bookjans, J. Lodewyck, R. Le Targat, P. Delva, S. Bize, F. N. Baynes, C. F. A. Baynham, W. Bowden, P. Gill, R. M. Godun, I. R. Hill, R. Hobson, J. M. Jones, S. A. King, P. B. R. Nisbet-Jones, A. Rolland, S. L. Shemar, P. B. Whibberley, H. S. Margolis
Article
Optics
Signe B. Markussen, Jurgen Appel, Christoffer Ostfeldt, Jean-Baptiste S. Beguin, Eugene S. Polzik, Jorg H. Mueller
APPLIED PHYSICS B-LASERS AND OPTICS
(2020)
Article
Physics, Applied
N. Galland, N. Lucic, B. Fang, S. Zhang, R. Le Targat, A. Ferrier, P. Goldner, S. Seidelin, Y. Le Coq
PHYSICAL REVIEW APPLIED
(2020)
Article
Optics
I. Galinskiy, Y. Tsaturyan, M. Parniak, E. S. Polzik
Article
Physics, Multidisciplinary
Rodrigo A. Thomas, Michal Parniak, Christoffer ostfeldt, Christoffer B. Moller, Christian Baerentsen, Yeghishe Tsaturyan, Albert Schliesser, Jurgen Appel, Emil Zeuthen, Eugene S. Polzik
Summary: The study successfully achieved entanglement between a millimeter-sized mechanical membrane oscillator and a collective atomic spin oscillator, demonstrating an Einstein-Podolsky-Rosen variance below the separability limit. Overcoming the disparity of hybrid systems and the vulnerability of quantum correlations allowed for the generation of macroscopic hybrid entanglement.
Article
Physics, Multidisciplinary
M. B. Christensen, T. Vibel, A. J. Hilliard, M. B. Kruk, K. Pawlowski, D. Hryniuk, K. Rzazewski, M. A. Kristensen, J. J. Arlt
Summary: Quantum systems exhibit inherent fluctuations in their physical observables, which presents challenges in studying interactions in quantum systems at finite temperature. This study characterizes atom number fluctuations in weakly interacting Bose-Einstein condensates, showing a reduction in fluctuations below canonical expectations. The experimental results set a benchmark for theoretical calculations under typical experimental conditions, revealing microcanonical nature of the system and a near linear scaling relationship between peak fluctuations and atom number.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Karsten B. Dideriksen, Rebecca Schmieg, Michael Zugenmaier, Eugene S. Polzik
Summary: A single-photon source based on room-temperature memory has been demonstrated, with improved purity and storage time of the photonic state. The non-classical correlations between the heralding and the retrieved photons are maintained for an extended period, surpassing previous demonstrations with other room-temperature systems.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Tulio Brito Brasil, Valeriy Novikov, Hugo Kerdoncuff, Mikael Lassen, Eugene S. Polzik
Summary: This study reports a high-purity EPR state between two light modes, demonstrating strong quantum correlations and an extended frequency range, which enables new matter-light quantum protocols.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Sofus Laguna Kristensen, Eliot Bohr, Julian Robinson-Tait, Tanya Zelevinsky, Jan W. Thomsen, Jorg Helge Mueller
Summary: Superradiant lasers operate in the bad-cavity regime, where the phase coherence is stored in the spin state of an atomic medium rather than in the intracavity electric field. These lasers use collective effects to sustain lasing and could potentially reach considerably lower linewidths than a conventional laser. In this study, we investigate the properties of superradiant lasing in an ensemble of ultracold 88Sr atoms inside an optical cavity and achieve a lasing linewidth of 820 Hz for 1.1 ms, nearly an order of magnitude lower than the natural linewidth.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Wenqiang Zheng, Hengyan Wang, Rebecca Schmieg, Alan Oesterle, Eugene S. Polzik
Summary: Magnetic induction tomography (MIT) is a protocol that uses radio-frequency magnetic fields to sense conductive objects. It has applications in nondestructive testing across various fields. By combining MIT with conditional spin squeezing and stroboscopic backaction evasion, we propose and verify a quantum-enhanced version of MIT using atomic magnetometers as sensors. This quantum enhancement allows for increased sensitivity beyond the standard quantum limits in detecting conductive samples in one-dimensional quantum MIT.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Hans Staerkind, Kasper Jensen, Jorg H. Mueller, Vincent O. Boer, Esben T. Petersen, Eugene S. Polzik
Summary: By accurately measuring the transitions between extreme angular-momentum states of the cesium D2 line, we have overcome a major obstacle for accurate high-field optical magnetometry. We obtained very precise measurements of the linear and quadratic magnetic field dependence, characterized by the coefficients γ1 and γ2, which have potential applications in medical MRI, fusion reactors, and particle accelerators.
Proceedings Paper
Engineering, Electrical & Electronic
Hugo Kerdoncuff, Jesper B. Christensen, Tulio B. Brasil, Valeriy A. Novikov, Eugene Polzik, Jan Hald, Mikael Lassen
2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2020)
Article
Physics, Multidisciplinary
S. Zhang, N. Galland, N. Lucic, R. Le Targat, A. Ferrier, P. Goldner, B. Fang, Y. Le Coq, S. Seidelin
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Multidisciplinary
Mikkel Tang, Stefan A. Schaffer, Asbjorn A. Jorgensen, Martin R. Henriksen, Bjarke T. R. Christensen, Jorg H. Muller, Jan W. Thomsen
Summary: This study investigates the spectral properties and phase behavior of pulsed lasing on the S-1(0) - P-3(1) line of Sr-88 in a mK thermal ensemble. Experimental results show that for certain detunings of the cavity resonance, the influence of cavity noise on the lasing frequency can be eliminated to first order.
PHYSICAL REVIEW RESEARCH
(2021)
