Article
Materials Science, Multidisciplinary
Tristan Martin, Ivar Martin, Kartiek Agarwal
Summary: This study investigates the influence of quasiperiodic and random noise on the discrete symmetry generators in many-body systems, revealing three stages of relaxation and explaining their relationship with the noise spectrum.
Article
Materials Science, Multidisciplinary
Martin Rodriguez-Vega, Michael Vogl, Gregory A. Fiete
Summary: In this study, AB-stacked honeycomb bilayers driven by light in resonance with an infrared phonon were theoretically investigated using a tight-binding description. The phonon properties were characterized with group theory, and an electronic time-dependent tight-binding model was constructed for the system following photoexcitation in resonance with an infrared phonon. The results show that low-frequency light can induce a band gap in the quasienergy spectrum, and the driven phonon and electron processes have contrasting effects on the autocorrelation functions at the same driving frequency.
Article
Optics
Trevor McCourt, Charles Neill, Kenny Lee, Chris Quintana, Yu Chen, Julian Kelly, Jeffrey Marshall, V. N. Smelyanskiy, M. I. Dykman, Alexander Korotkov, Isaac L. Chuang, A. G. Petukhov
Summary: Understanding and characterizing noise during two-qubit gates is crucial for developing scalable quantum computers. In this study, we propose and employ multiqubit dynamical decoupling sequences to capture the noise in entangled systems. The observed noise in our superconducting system is induced by coupler flux fluctuations, which causes fluctuations in the entangling parameter of the two qubits and leads to the stepwise decay of signals.
Article
Physics, Applied
Jiawei Qiu, Yuxuan Zhou, Chang-Kang Hu, Jiahao Yuan, Libo Zhang, Ji Chu, Wenhui Huang, Weiyang Liu, Kai Luo, Zhongchu Ni, Xianchuang Pan, Zhixuan Yang, Yimeng Zhang, Yuanzhen Chen, Xiu-Hao Deng, Ling Hu, Jian Li, Jingjing Niu, Yuan Xu, Tongxing Yan, Youpeng Zhong, Song Liu, Fei Yan, Dapeng Yu
Summary: To achieve scalable quantum information processing, the ability to tune multi-qubit interactions is crucial. However, this can lead to difficulties in precise manipulation of quantum states. The use of dynamical decoupling techniques has been shown to effectively suppress coherent errors between multi-qubits, resulting in an enhancement in pure dephasing time.
PHYSICAL REVIEW APPLIED
(2021)
Article
Physics, Nuclear
Anping Huang, Duan She, Shuzhe Shi, Mei Huang, Jinfeng Liao
Summary: The magnetic fields in heavy-ion collisions play important roles in various phenomena, including the chiral magnetic effect, the chiral magnetic wave, the directed flow v1 of D0 mesons, and the splitting of the spin polarization of the Lambda/(Lambda) over bar over bar. However, understanding the dynamical evolution of these fields in the created medium is still a critical and challenging problem. In this study, we analyze the medium effect on the dynamical magnetic fields by numerically solving Maxwell's equations coupled with viscous hydrodynamics. Our results indicate a significant enhancement of late time magnetic fields, which depends sensitively on the expansion of the fireball and the medium electric conductivity.
Article
Engineering, Electrical & Electronic
Andrea Pizzo, Andrea de Jesus Torres, Luca Sanguinetti, Thomas L. Marzetta
Summary: This paper presents a signal space approach to study the Nyquist sampling, number of degrees of freedom, and reconstruction of an electromagnetic field under arbitrary scattering conditions. By using conventional signal processing tools, the spatially bandlimited nature of electromagnetic fields is revealed, and the number of fields' samples needed to be processed is reduced.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2022)
Article
Computer Science, Information Systems
Jiying Zhang, Shan Wu, Yongchang Zhang, Zhengwei Zhou
Summary: The proposed scheme uses Uhrig dynamical decoupling to generate two-axis countertwisting squeezed spin states from a one-axis twisting Hamiltonian, significantly reducing the number of control pulses or required evolution time compared to previous proposals. The minimum number of applied pulses changes almost linearly relative to the spin number.
SCIENCE CHINA-INFORMATION SCIENCES
(2021)
Article
Physics, Multidisciplinary
X. Wu, P. Z. Zhao
Summary: This paper proposes a scheme of nonadiabatic geometric quantum computation protected by dynamical decoupling via the XXZ Hamiltonian, which can be realized in solid-state systems such as superconducting circuits and quantum dots.
FRONTIERS OF PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Gang Wang, Yuan Zhong, Qi Xiao, Qiangxin Li
Summary: The development of the Koch curve fractal geometry provides valuable ideas for the structural design of sensors. Conventional eddy current sensors have limitations in concentrating electromagnetic energy and detection sensitivity. This article proposes a novel eddy current sensor based on the Koch curve fractal geometry, which can change the distribution of electromagnetic fields in space. The results of simulation and defect detection experiments demonstrate that the proposed sensor can effectively concentrate electromagnetic fields and improve detection performance.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Computer Science, Artificial Intelligence
Shu Li, Qingqing Yan, Xun Zhou, Deming Wang, Chengju Liu, Qijun Chen
Summary: This article proposes a real-time driving scene parsing framework called NDNet, which utilizes the spacewise neighbor decoupling (ND) and neighbor coupling (NC) methods to achieve high-quality semantic segmentation and real-time performance. Experimental results demonstrate the superiority of this method compared to others on the Cityscapes dataset.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2022)
Article
Physics, Applied
Pengcheng Fan, Heng Yuan, Lixia Xu, Jixing Zhang, Guodong Bian, Mingxin Li, Zhuo Wang
Summary: The adjusted Carr-Purcell-Meiboom-Gill sequence was used to detect C-13 nuclear spin signals coupled to a negatively-charged nitrogen-vacancy center in diamond, achieving high resolution detection. The improved frequency resolution and coherence dips width offer a promising approach to enhance the identification of nuclear spins in coupled electron-nuclear spin systems. The adjusted method can also be applied to other dynamical decoupling sequences for further improvement in spin detection.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Optics
Jonathan Conrad
Summary: The study presents a new method for GKP quantum error correction, which allows for diagonalizing logical channels, projecting states into the GKP code space, and constructing a dynamical decoupling sequence without the need for explicit stabilizer measurements or state reset. This approach aims to generate a passively stabilized GKP qubit for protected quantum computing.
Article
Polymer Science
Kenneth P. Mineart, Cameron Hong, Lucas A. Rankin
Summary: Organogels are being explored as materials for transdermal drug delivery, with findings suggesting that the varying viscosity of mineral oils affects solute transport through gels, but not their mechanical behavior. This relationship between mineral oil viscosity and solute diffusion is supported by a theoretical hydrodynamic model.
Article
Nanoscience & Nanotechnology
Xianhui Yi, Apparao M. M. Rao, Jiang Zhou, Bingan Lu
Summary: To improve the ionic conductivity and safety of potassium-ion batteries, researchers developed a K+ flux rectifier that limits the degree of freedom for K+ movement. The rectifier improved the electrochemical performance of the batteries, enhancing oxidation stability, inhibiting dendrite formation and organic cathode dissolution. The K||K cells cycled continuously for over 3,700 hours, K||Cu cells operated stably for 800 cycles with a Coulombic efficiency exceeding 99%, and K||graphite cells showed high capacity retention after 1,500 cycles. The organic cathodes operated for over 2,100 cycles and showed no significant capacity fading after 100 cycles in a pouch cell.
NANO-MICRO LETTERS
(2023)
Article
Optics
J. M. Gomez Llorente, I. Gomez-Ojeda, J. Plata
Summary: In this study, we analyze the robustness of continuous dynamical decoupling (CDD) against nonstatic noise in a hyperfine Zeeman multiplet in 87Rb. By combining stochastic analysis methods with time-dependent perturbation theory, we are able to track the decoherence process caused by generic noise sources. The results show that the amplitude and frequency of the control field can be chosen appropriately to minimize the impact of nonstatic random input, and the effect of noise can be described using a random variable in the dressed-state picture. The importance of spectral density of fluctuations to the performance of CDD technique is evaluated.
Article
Physics, Applied
Cameron Deans, Luca Marmugi, Ferruccio Renzoni
APPLIED PHYSICS LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Luca Marmugi, Ferruccio Renzoni
APPLIED SCIENCES-BASEL
(2020)
Article
Physics, Applied
Cameron Deans, Yuval Cohen, Han Yao, Benjamin Maddox, Antonio Vigilante, Ferruccio Renzoni
Summary: This study demonstrates electromagnetic induction imaging using an unshielded, portable radio frequency atomic magnetometer scanning over the target object. The ability to scan the magnetometer over the object relies on sensor head miniaturization, active compensation of the ambient magnetic field, and a dedicated procedure to extract high-quality images from the recorded spatial dependent magnetic resonance.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Benjamin Maddox, Yuval Cohen, Ferruccio Renzoni
Summary: This study demonstrates the through-skin electromagnetic induction imaging of pilot-holes in an aluminum block concealed by an aluminum shield. The accuracy of imaging is ensured with submillimeter accuracy using a dual-frequency technique to remove the effect of the shielding. The proposed imaging approach is robust and immune to the influence of a thermal insulator, showing potential applications in aircraft wing manufacture.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Han Yao, Benjamin Maddox, Yuval Cohen, Ferruccio Renzoni
Summary: This paper presents an efficient approach for optimizing the performance of a radio-frequency atomic magnetometer (RF-AM) using an open-loop optimization technique based on Uniform Design (UD). The proposed method allows for the efficient optimization of the atomic magnetometer at different frequencies, and is applicable to both AC and DC sensitivity optimization. It does not require detailed knowledge of the underlying operation model and reduces the number of experimental runs required. It is particularly suitable for self-calibration of devices without human supervision.
Article
Physics, Applied
Y. Cohen, B. Maddox, C. Deans, L. Marmugi, F. Renzoni
Summary: This study reports on a radio frequency magnetometer that utilizes a Bose-Einstein condensate of Rb-87 atoms held in a dipole trap. The magnetometer achieves different sensitivities at different probing volumes, providing flexibility for various applications.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Han Yao, Benjamin Maddox, F. Renzoni
Summary: This article demonstrates the high-sensitivity operation of unshielded atomic magnetometers in a magnetically noisy environment. Multiple fluxgate magnetometers are used for active in-situ bias field stabilization, combined with a counter-propagating pump and triple-pass probe configuration to maximize atomic polarization and probe rotation for high-sensitivity. The presented setup is suitable for long-range magnetic field detection.
Correction
Optics
Han Yao, Benjamin Maddox, Ferruccio Renzoni
Summary: An erratum is issued to address the omission of the correct vertical scale and label in Fig. 2 and Fig. 7 in our published manuscript.
Article
Physics, Applied
Benjamin Maddox, Ferruccio Renzoni
Summary: Electromagnetic induction imaging (EMI) is a nondestructive evaluation technique that senses the response of a target to oscillating magnetic fields. The use of radio frequency atomic magnetometers (RF-AMs) at low frequencies enhances the sensitivity of through-barrier EMI measurements. A two-photon RF-AM scheme is implemented in a portable setup to achieve stable resonances in the sub-kHz regime without the need for a low bias field. This portable system allows for improved skin penetration and detection of features behind a shield.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Fluids & Plasmas
David Cubero
Summary: The article derives an exact expression for the average velocity of cold atoms in a driven, dissipative optical lattice using semiclassical equations. The expression is based on the amplitudes of atomic density waves. The calculations are specifically for a Jg = 1/2 -> Je = 3/2 transition, commonly used in theoretical studies of Sisyphus cooling. The new expression allows the quantification of the contribution of specific atomic waves to the atomic motion, revealing unexpected counterpropagating contributions from many modes. Additionally, the method provides a generic threshold for the transition into the regime of infinite density.
Article
Engineering, Electrical & Electronic
Benjamin Maddox, Cameron Deans, Han Yao, Yuval Cohen, Ferruccio Renzoni
Summary: We introduce a new approach to electromagnetic induction imaging (EMI) by performing a 2-D optical raster scan within the vapor cell of a radio frequency atomic magnetometer (RF-AM), which overcomes the limitations of mechanical scanning. This technique allows for robust and repeatable magnetic measurements and successfully resolves conductive targets with EMI.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Physics, Multidisciplinary
Alexander Staron, Kefeng Jiang, Casey Scoggins, Daniel Wingert, David Cubero, Samir Bali
Summary: The study focuses on randomly diffusing atoms confined in a dissipative optical lattice and illuminated by a weak probe of light. It reveals directed atomic propagation perpendicular to the direction of probe beam propagation and observes resonant enhancement of this propagation by varying the random photon scattering rate. The stochastic resonance is experimentally characterized as a function of probe intensity and lattice well depth. A simple model explains the directed atomic propagation within the randomly diffusing sample by considering the probe-excited atomic density waves and optical pumping rates.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Chemistry, Physical
Yuanyang Ren, Yang Wu, Bing Xiao, Kai Wu, David Cubero
Summary: The study found that heat transport in polymeric materials can be improved by adding boron nitride nanotubes, especially after surface functionalization with a silane coupling agent to facilitate heat conduction between the nanotubes and the polymer matrix. Despite showing a deterioration in heat transport with the addition of coupling agents, they are expected to promote nucleation of crystalline regions, significantly boosting heat conduction in the material.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
David Cubero, Ferruccio Renzoni
Summary: This work extends vibrational mechanics to higher dimensions by introducing fast vibrations applied to different directions, particularly with a split biharmonic drive. The analysis shows a highly tunable effective potential can be achieved, allowing for amplitude tuning and introducing arbitrary spatial translations. The setup can be generalized to implement translations in any direction within the landscape, including three-dimensional periodic potentials.
