Article
Optics
Pedro Pessoa
Summary: This study presents an exact calculation of thermodynamical quantities related to Bose-Einstein condensation in arbitrary quantum systems, without relying on the thermodynamic limit. Results show that the derivative of specific heat in a three-dimensional box gas reaches smaller values than expected in the thermodynamic limit, confirming the importance of understanding the role of the thermodynamic limit in phase transitions. This approach allows for precise calculations irrespective of temperature, providing a way to further study BE statistics without relying on approximations near critical temperature or the thermodynamic limit.
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, Multidisciplinary
Bongjune Kim, Ko-Tang Chen, Shih-Si Hsiao, Sheng-Yang Wang, Kai-Bo Li, Julius Ruseckas, Gediminas Juzeliunas, Teodora Kirova, Marcis Auzinsh, Ying-Cheng Chen, Yong-Fan Chen, Ite A. Yu
Summary: This study proposed a method of utilizing the cooling effect in a system of Rydberg polaritons under weak interaction, and observed a series of interesting phenomena, providing a feasible platform for polariton Bose-Einstein condensation.
COMMUNICATIONS PHYSICS
(2021)
Article
Optics
Kali E. Wilson, Alexander Guttridge, Jack Segal, Simon L. Cornish
Summary: Production of quantum degenerate Bose-Bose mixtures of Cs and Yb with both attractive and repulsive interspecies interactions is reported. Dual-species evaporation in a bichromatic optical dipole trap allows for efficient sympathetic cooling of Cs. For Cs + Yb-174, the attractive interspecies interaction is stabilized by repulsive intraspecies interactions, while for Cs + Yb-170(b), the repulsive interspecies interaction can overwhelm the intraspecies interactions, resulting in partial miscibility of the mixture.
Article
Multidisciplinary Sciences
Nathaniel B. Vilas, Christian Hallas, Loic Anderegg, Paige Robichaud, Andrew Winnicki, Debayan Mitra, John M. Doyle
Summary: In this study, the successful magneto-optical trapping of a polyatomic molecule, calcium monohydroxide (CaOH), demonstrates the feasibility and practicality of laser cooling and trapping for polyatomic species. This achievement has significant implications for various applications in quantum science.
Review
Materials Science, Multidisciplinary
V. I. Sugakov
Summary: The study investigates phase transitions in a magnetic crystal where regions with opposite magnetization direction appear. These transitions are caused by strong exchange interactions and nonlocal relaxation processes. The formation of phases with inverse magnetization direction intensifies during rapid cooling of the sample.
Article
Physics, Nuclear
O. S. Stashko, O. Savchuk, R. Poberezhnyuk, V. Vovchenko, M. Gorenstein
Summary: Equation of state and electric (isospin) charge fluctuations for matter composed of interacting pions are studied using a mean-field approximation. Two scenarios for fixing model parameters with and without a first-order phase transition are considered, both providing a satisfactory description of lattice data. Differences in behavior of isospin charge susceptibilities are qualitatively compared for these two scenarios, with potential for probing through lattice simulations at temperatures below or around 100 MeV.
Article
Optics
Yunfei Wang, Yuqing Li, Jizhou Wu, Wenliang Liu, Jiazhong Hu, Jie Ma, Liantuan Xiao, Suotang Jia
Summary: The study focuses on the Bose-Einstein condensation of Cs-133 atoms and a hybrid evaporative cooling method combining magnetically tunable evaporation with optical evaporation. The experimental results are in excellent agreement with the equation model for evaporative cooling.
Article
Optics
Wei Xiong, Peng Gao, Zhan-Ying Yang, Wen -Li Yang
Summary: We numerically investigated the dynamics of a one-dimensional matter-wave soliton colliding with a vibrating atomic mirror. The soliton splits into discrete momentum wave packets and the kinetic energy of the internal atoms is quantized. By quenching the nonlinear strength, the reflected wave packets, originally diffusing, can form soliton states. The number and total kinetic energy of the wave packets depend on the vibrating amplitude and frequency of the mirror. The energy quantization also occurs in an atomic mirror with double-frequency vibration, related to the difference frequency.
Article
Optics
S. Barland, P. Azam, G. L. Lippi, R. A. Nyman, R. Kaiser
Summary: This study reports on the experimental investigation of photon thermalization and condensation in a semiconductor microresonator in the weak-coupling regime. The observed phase transition and identified saturation of population at high energies and superlinear increase of occupation at low energy suggest Bose-Einstein condensation of photons in equilibrium with a particle reservoir. This research provides insights into the relationship between photon thermalization and laser emission.
Article
Optics
Ji-Bing Yuan, Bo Zhang, Ya-Ju Song, Shi-Qing Tang, Xin-Wen Wang, Le -Man Kuang
Summary: We propose a theoretical scheme for quantum sensing of temperature close to absolute zero in a quasi-one-dimensional Bose-Einstein condensate (BEC) using a single-atom impurity qubit as a temperature sensor. By measuring the quantum coherence of the probe qubit, we demonstrate that the sensitivity of the temperature sensor can saturate the quantum Cramer-Rao bound. We investigate the temperature sensing performance using the quantum signal-to-noise ratio (QSNR) and find an optimal encoding time that maximizes QSNR in the full-temperature regime. Our work avoids the sensing-error-divergence problem, even when the temperature is close to absolute zero, in the weak coupling regime. This opens up a way for quantum sensing of temperature close to absolute zero in the BEC.
Article
Astronomy & Astrophysics
Kay Kirkpatrick, Anthony E. Mirasola, Chanda Prescod-Weinstein
Summary: In this study, we investigate the condensation time of self-interacting axion-like particles in a gravitational well. We find that when taking into account the axions' virial velocity, the time scale associated with self-interactions scales as lambda(2).
Article
Optics
Jakub Liska, Lukas Jelinek, Miloslav Capek
Summary: Knowledge of the fundamental limitations on a magnetic trap for neutral particles is important for designers. This paper defines performance limitations using a local approximation and compares them with different trap designs. The comparison reveals a significant gap between traditional designs and fundamental limitations, indicating the potential for improved trap designs.
Article
Instruments & Instrumentation
Yong-Guang Zheng, Lei Jiang, Zi-Hang Zhu, Wei-Yong Zhang, Zhao-Yu Zhou, Bo Xiao, Zhen-Sheng Yuan
Summary: Researchers present a compact and gain-enhanced microwave helical antenna for manipulating ultracold Rb-87 atoms coherently. By replacing the reflecting plate, the antenna reduces the voltage standing wave ratio and increases the gain. Applying this antenna to ultracold Rb-87 atomic experiments, they achieve a Rabi frequency of the oscillation between the hyperfine levels.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Instruments & Instrumentation
G. Unnikrishnan, C. Beulenkamp, D. Zhang, K. P. Zamarski, M. Landini, H-C Naegerl
Summary: A compact and robust setup for optically transporting ultracold atoms over long distances is presented using a focus-tunable moire lens. The moire lens demonstrates superior thermal stability and low astigmatism, achieving a transfer efficiency of 70% with negligible temperature change. Compared to fluid-based varifocal lenses, the moire lens is more compact and stable, allowing for simplified experimental setups.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Multidisciplinary Sciences
S. Kolkowitz, S. L. Bromley, T. Bothwell, M. L. Wall, G. E. Marti, A. P. Koller, X. Zhang, A. M. Rey, J. Ye
Article
Physics, Multidisciplinary
Jonathan Kohler, Nicolas Spethmann, Sydney Schreppler, Dan M. Stamper-Kurn
PHYSICAL REVIEW LETTERS
(2017)
Article
Multidisciplinary Sciences
S. L. Campbell, R. B. Hutson, G. E. Marti, A. Goban, N. Darkwah Oppong, R. L. McNally, L. Sonderhouse, J. M. Robinson, W. Zhang, B. J. Bloom, J. Ye
Article
Physics, Multidisciplinary
Jonathan Kohler, Justin A. Gerber, Emma Dowd, Dan M. Stamper-Kurn
PHYSICAL REVIEW LETTERS
(2018)
Article
Physics, Multidisciplinary
G. Edward Marti, Ross B. Hutson, Akihisa Goban, Sara L. Campbell, Nicola Poli, Jun Ye
PHYSICAL REVIEW LETTERS
(2018)
Article
Multidisciplinary Sciences
Simon Hollerith, Johannes Zeiher, Jun Rui, Antonio Rubio-Abadal, Valentin Walther, Thomas Pohl, Dan M. Stamper-Kum, Immanuel Bloch, Christian Gross
Article
Physics, Multidisciplinary
Michael P. Zaletel, Adam Kaufman, Dan M. Stamper-Kurn, Norman Y. Yao
Summary: The study introduces a method to prepare low-entropy many-body states in isolated quantum optical systems by using conformal cooling quenches. It involves transferring entropy between different regions of the system by spatially modulating the effective Hamiltonian. Research findings suggest that even moderately sized bath regions can remove sufficient energy and entropy density to reveal coherent low-temperature physics.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Emma Deist, Justin A. Gerber, Yue-Hui Lu, Johannes Zeiher, Dan M. Stamper-Kurn
Summary: We realize a scanning probe microscope using single trapped Rb-87 atoms to measure optical fields with subwavelength spatial resolution. The microscope detects fluorescence from a single atom and determines the ac Stark shift from other local optical fields via the change in fluorescence rate. The microscope achieves a superresolving spatial resolution of 300 nm.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Johannes Zeiher, Julian Wolf, Joshua A. Isaacs, Jonathan Kohler, Dan M. Stamper-Kurn
Summary: The study utilizes enhanced light-matter coupling to perform minimally invasive continuous measurements of ultracold atomic gas, enabling detection of atom-number fluctuations well below the level set by Poissonian statistics. By characterizing two-time correlations of atom number, the research reveals the nonlinearity of the evaporation process and inherent fluctuations in atom transport.[keys: fluctuation, ultracold atomic gases, enhanced light-matter coupling, nonlinearity, evaporation, two-time correlations]
Article
Physics, Multidisciplinary
Biao Huang, Tsz-Him Leung, Dan M. Stamper-Kurn, W. Vincent Liu
Summary: This paper analytically identifies a new class of quantum scars, called Floquet-Bloch scars, which are protected by spatiotemporal translation symmetries. These scars are distinguished from previous (quasi-) static scars by their rigid spectral pairing, which is only possible in Floquet systems. The strong interaction and drivings in these systems equalize the quasienergy corrections to all scars, maintaining their spectral spacings against generic perturbations.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Charles D. Brown, Shao-Wen Chang, Malte N. Schwarz, Tsz-Him Leung, Vladyslav Kozii, Alexander Avdoshkin, Joel E. Moore, Dan Stamper-Kurn
Summary: This study directly measured the non-Abelian transformation produced by transport through singularities in ultracold atoms in an optical lattice. By measuring the acceleration process along a quasi-momentum trajectory, the topological winding numbers of the singularities were identified, providing a new method for studying non-Dirac singularities in ultracold-atom quantum simulators.
Article
Physics, Multidisciplinary
Emma Deist, Yue-Hui Lu, Jacquelyn Ho, Mary Kate Pasha, Johannes Zeiher, Zhenjie Yan, Dan M. Stamper-Kurn
Summary: Subsystem readout is crucial for error correction in quantum computation. In this study, a strongly coupled optical cavity is used to read out the state of a single atom with high fidelity and nondestructively.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Scott Eustice, Dmytro Filin, Jackson Schrott, Sergey Porsev, Charles Cheung, Diego Novoa, Dan M. Stamper-Kurn, Marianna S. Safronova
Summary: We propose an optical clock based on ultranarrow transitions in neutral titanium, which can integrate with robust laser technology due to their small blackbody radiation, quadratic Zeeman shifts, and wavelengths within the telecommunication fiber bands. Magic wavelengths are identified using the largest-to-date direct dynamical polarizability calculations, and challenges arising from magnetic dipole-dipole interactions are addressed. The deployment of a telecommunications-band atomic frequency standard will facilitate optical clock networks and clock comparisons over long distances.
Article
Optics
Andrew O. Neely, Kayleigh Cassella, Scott Eustice, Dan M. Stamper-Kurn
Summary: By utilizing saturated absorption spectroscopy to probe titanium vapor, we measured and analyzed the isotope shifts in the neutral titanium multiplet transitions, deriving specific mass and field shifts related to electronic and nuclear structure variations. We observed a strong J-dependent variation in each transition, offering insight into both electronic and nuclear structure of transition metal atoms like titanium.
Article
Optics
Thomas H. Barter, Tsz-Him Leung, Masayuki Okano, Maxwell Block, Norman Y. Yao, Dan M. Stamper-Kurn