Article
Physics, Multidisciplinary
Adrien Devolder, Paul Brumer, Timur Tscherbul
Summary: The study demonstrates that quantum interference-based coherent control is an efficient tool for tuning ultracold molecular collision dynamics, showing extensive control over various parameters in ultracold collisions such as spin-exchange cross sections and product branching ratios.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Marcell Gall, Nicola Wurz, Jens Samland, Chun Fai Chan, Michael Koehl
Summary: Researchers have used high-resolution microscopy to explore quantum phases in two-dimensional fermionic systems in optical lattices. By implementing a bilayer Fermi-Hubbard model, they found that interlayer coupling controls the crossover between different electronic states, potentially advancing future studies on superconducting properties of Hubbard models.
Review
Nanoscience & Nanotechnology
Andreas J. Heinrich, William D. Oliver, Lieven M. K. Vandersypen, Arzhang Ardavan, Roberta Sessoli, Daniel Loss, Ania Bleszynski Jayich, Joaquin Fernandez-Rossier, Arne Laucht, Andrea Morello
Summary: Over the past three decades, nanoscience and quantum science have merged to create a new research field known as quantum-coherent nanoscience. This review focuses on the fundamental principles and practical applications of quantum coherence in nanoscale systems, as well as the challenges and opportunities ahead.
NATURE NANOTECHNOLOGY
(2021)
Article
Chemistry, Physical
Adrien Devolder, Timur V. Tscherbul, Paul Brumer
Summary: This study investigates the coherent control of ultracold molecule-molecule scattering influenced by a dense set of rovibrational resonances. A simple model based on multichannel quantum defect theory is used to characterize the resonance spectrum and analyze the control of scattering cross section and reaction rate. The results show that complete control is possible around resonance energies, but thermal averaging reduces the control range of reaction rates due to the random distribution of optimal control parameters among resonances. Measuring the extent of coherent control can provide meaningful information about the relative contribution of direct scattering versus collision complex formation and the statistical regime.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Physics, Multidisciplinary
Mateusz Mazelanik, Adam Leszczynski, Tomasz Szawello, Michal Parniak
Summary: The authors propose and demonstrate an optical method to probe spin resonances and reconstruct the 3D structure of an atomic ensemble's coherence based on a single measurement of a two-photon Raman transition. This technique allows for the reconstruction of complex 3D coherence profiles and has the potential to be used in magnetometry, electrometry, and imaging of electromagnetic fields.
COMMUNICATIONS PHYSICS
(2023)
Article
Optics
Saumya Choudhary, Robert W. Boyd, J. E. Sipe
Summary: Several plasmonic nanoparticles can couple to form nonradiative dark and radiative bright modes through radiative coupling. We develop an analytical model to explain the formation of these modes in bilayers consisting of dipolar nanoantenna arrays. Our model includes near-field contributions and shows good agreement with finite-difference time-domain simulation results. Changing the material and geometrical parameters can vary the reflection and absorption spectra of the bilayers, making them useful for designing efficient spectral filters. By adjusting the phase between two counterpropagating normally incident fields, we can selectively excite these modes, which has applications in all-optical modulators and switches based on linear interferometric effects.
Review
Physics, Multidisciplinary
Matthew A. Norcia, Francesca Ferlaino
Summary: The complex electronic structure of lanthanide atoms leads to multiple characteristic properties, such as a large number of optical transitions, anisotropic interaction properties, and a large magnetic moment and spin space in the ground state. These features enable enhanced control over ultracold atoms and their interactions, leading to new forms of control and novel many-body phenomena.
Article
Optics
Roy Elbaz, Yaakov Yudkin, P. Giannakeas, Jan-Michael Rost, Chris H. Greene, Lev Khaykovich
Summary: We observe coherent oscillations in the conversion efficiency of weakly bound dimers formed from a thermal gas of ultracold atoms. The coherence is lost due to the finite thermal energy of the gas when a broad continuum is coupled to a discrete bound state. However, coherence can be restored through nonadiabatic transitions of the dressed molecular energy level induced by a strong modulation pulse. Experimental findings are supported by theoretical modeling and numerical calculations, and the results may lead to renewed interest in studying the interaction between a discrete energy level and a broadband continuum.
Review
Quantum Science & Technology
Shangguo Zhu, Yun Long, Wei Gou, Mingbo Pu, Xiangang Luo
Summary: Arrays of individual atoms trapped in optical microtraps offer a versatile platform for quantum sciences and technologies. By utilizing tunnel-coupled optical microtraps, researchers can explore exotic quantum states, phases, and dynamics that are challenging to achieve in conventional optical lattices.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Physics, Multidisciplinary
Saeed Ghanbari
Summary: We introduce 3D permanent magnetic lattices for ultracold atoms and provide analytical expressions for the location of magnetic field minima and various physical quantities. The trap depths, modulation depths, and trap frequencies can be controlled by the bias field. Compared to optical lattices, the permanent magnetic lattices offer higher trap depths and trap frequencies, particularly between magnetic layers.
Article
Physics, Applied
Joseph Lindon, Arina Tashchilina, Logan W. Cooke, Lindsay J. LeBlanc
Summary: In this study, neutral-atom qutrits are encoded in an ensemble of ultracold 87Rb and arbitrary single-qutrit SU(3) gates are demonstrated. The Walsh-Hadamard Fourier transform is implemented and characterized using two different gate sets, showing the potential of ultracold neutral-atom qutrits as a platform for quantum information processing.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Multidisciplinary
Wenhao Han, Ming Chen, Tianrang Wang, Renjie Li, Xinyu Shi, Wanli Zhao, Xiangyang Wang, Jinbiao Liu, Chuanxin Teng, Shijie Deng
Summary: In this paper, a novel method for designing ultrafast all-optical switchings based on the coherent perfect absorption principle of metasurface is proposed. By modulating the absorption and analyzing the influence of geometric parameters, the ultrafast all-optical switching function is achieved at low intensity conditions.
Article
Physics, Applied
Ryoto Takeuchi, Hayaki Chiba, Shoichi Okaba, Masao Takamoto, Shigenori Tsuji, Hidetoshi Katori
Summary: We have demonstrated the continuous outcoupling of ultracold Sr-88 atoms using a moving optical lattice. By optically pumping the atoms to the 5s5p P-3(0) state, we outcouple the atoms by a moving optical lattice. Such a continuous atomic source enables superradiant lasers and the zero-dead-time operation of atom interferometers and optical lattice clocks.
APPLIED PHYSICS EXPRESS
(2023)
Article
Optics
A. Wolf, P. Boegel, M. Meister, A. Balaz, N. Gaaloul, M. A. Efremov
Summary: This study proposes creating shell-shaped Bose-Einstein condensates in microgravity using dual-species atomic mixtures as an alternative to the conventional radio-frequency dressing method. The properties of these condensates and the feasibility of realizing symmetrically filled shells are analyzed.
Article
Chemistry, Physical
Baraa Shammout, Leon Karpa, Silke Ospelkaus, Eberhard Tiemann, Olivier Dulieu
Summary: A model for photoassociation of ultracold atoms and molecules is presented, focusing on the case of K-39 and (NaK)-Na-23-K-39 bosonic particles. The model assumes that photoassociation is dominated by long-range atom-molecule interactions and computes the energy level structure and photoassociation rates.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Multidisciplinary Sciences
Rikizo Ikuta, Toshiki Kobayashi, Tetsuo Kawakami, Shigehito Miki, Masahiro Yabuno, Taro Yamashita, Hirotaka Terai, Masato Koashi, Tetsuya Mukai, Takashi Yamamoto, Nobuyuki Imoto
NATURE COMMUNICATIONS
(2018)
Article
Instruments & Instrumentation
Da An, Clemens Matthiesen, Ahmed Abdelrahman, Maya Berlin-Udi, Dylan Gorman, Sonke Moller, Erik Urban, Hartmut Haffner
REVIEW OF SCIENTIFIC INSTRUMENTS
(2018)
Article
Physics, Multidisciplinary
Eli Megidish, Joseph Broz, Nicole Greene, Hartmut Haffner
PHYSICAL REVIEW LETTERS
(2019)
Article
Multidisciplinary Sciences
Tetsuya Mukai
SCIENTIFIC REPORTS
(2019)
Article
Physics, Multidisciplinary
Clemens Matthiesen, Qian Yu, Jinen Guo, Alberto M. Alonso, Hartmut Haffner
Summary: In this study, trapping of electrons in a millimeter-sized quadrupole Paul trap driven at 1.6 GHz in a room-temperature ultrahigh vacuum setup was demonstrated. Cold electrons were introduced into the trap by ionization of atomic calcium via Rydberg states and were confined by microwave and static electric fields for several tens of milliseconds. Some electrons remained trapped longer, showing no measurable loss for measurement times up to a second. Operating a similar electron Paul trap in a cryogenic environment may offer a platform for all-electric quantum computing with trapped electron spin qubits.
Article
Quantum Science & Technology
Ryan Shaffer, Eli Megidish, Joseph Broz, Wei-Ting Chen, Hartmut Haffner
Summary: Analog quantum simulation is expected to be a significant application of near-term quantum devices, and verifying these devices without relying on known simulation results is important as system sizes grow. Experimentally-driven verification protocols for analog quantum simulators are discussed for their sensitivity to error sources and scalability to larger system sizes. These protocols were demonstrated experimentally using a two-qubit trapped-ion analog quantum simulator and numerically using models of up to five qubits.
NPJ QUANTUM INFORMATION
(2021)
Review
Nanoscience & Nanotechnology
Kenneth R. Brown, John Chiaverini, Jeremy M. Sage, Hartmut Haffner
Summary: Trapped-ion qubits show great potential for quantum computation, but materials improvements are necessary to enhance performance. Materials research is needed to design traps that allow for improved performance and to minimize the ubiquitous electric-field noise produced by trap-electrode surfaces. Collaboration between materials scientists and trapped-ion technologists is essential to develop materials-based integration and noise-mitigation strategies for the next generation of trapped-ion quantum computers.
NATURE REVIEWS MATERIALS
(2021)
Article
Physics, Multidisciplinary
Daniel Carney, Hartmut Haffner, David C. Moore, Jacob M. Taylor
Summary: Electrons and ions trapped with electromagnetic fields, traditionally used as high-precision metrological instruments and quantum information processing platforms, can also serve as highly sensitive detectors for passing charged particles due to their extreme charge-to-mass ratio and low-noise quantum readout and control capabilities. These systems can detect energy depositions many orders of magnitude below typical ionization scales, showcasing potential applications in particle physics and noise characterization in quantum computers.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Da An, Alberto M. Alonso, Clemens Matthiesen, Hartmut Haffner
Summary: This study demonstrates the coupling between the motions of two independently trapped ions using a room-temperature metallic wire. The ion-ion interaction is enhanced, but quantum-coherent coupling is hindered by strong surface electric-field noise.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Joseph Broz, Bingran You, Sumanta Khan, Hartmut Haeffner, David E. Kaplan, Surjeet Rajendran
Summary: Quantum mechanics requires the time evolution of the wave function to be linear. A consistent causal nonlinear theory has been recently developed. Existing experimental tests for nonlinearities are rendered inapplicable due to the sensitivity of this theory to the full physical spread of the wave function. By using controlled motional superpositions of a trapped ion, we set a stringent limit of 5.4 x 10-12 on the magnitude of the unitless scaling factor epsilon similar to gamma for the predicted causal nonlinear perturbation.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Maya Berlin-Udi, Clemens Matthiesen, P. N. Thomas Lloyd, Alberto M. Alonso, Crystal Noel, Benjamin Saarel, Christine A. Orme, Chang-Eun Kim, Art J. Nelson, Keith G. Ray, Vincenzo Lordi, Hartmut Haffner
Summary: The aim of our study is to understand how the microscopic properties of a metal surface affect its electric field noise characteristics. We conducted a series of experiments involving heating, milling, and electron treatments on a single surface ion trap to investigate the thermal transformation process. Using Ca-40(+) ions as detectors, we monitored the electric field noise at frequencies close to 1 MHz and tracked changes in the composition of the contaminated metal surface using an Auger spectrometer.
Article
Optics
Qian Yu, Alberto M. Alonso, Jackie Caminiti, Kristin M. Beck, R. Tyler Sutherland, Dietrich Leibfried, Kayla J. Rodriguez, Madhav Dhital, Boerge Hemmerling, Hartmut Haffner
Summary: We investigate the feasibility of using electrons in a linear Paul trap as qubits in a future quantum computer. Through a concrete design proposal, we discuss the necessary experimental steps and conduct numerical simulations to evaluate the performance of such a device.
Article
Optics
Sara L. Mouradian, Neil Glikin, Eli Megidish, Kai-Isaak Ellers, Hartmut Haeffner
Summary: The study reveals that increasing the number of sensors can enhance sensitivity for continuous signals, but more sensors are required to achieve the same sensitivity for intermittent signals. The importance of control fidelity and readout at the quantum projection noise limit is demonstrated.
Article
Optics
Da An, Clemens Matthiesen, Erik Urban, Hartmut Haeffner
Article
Optics
Pai Peng, Clemens Matthiesen, Hartmut Haffner
