Article
Astronomy & Astrophysics
Janos Polonyi, Ines Rachid
Summary: The master equation for the reduced density matrix of a charged particle interacting with a translation invariant weakly coupled environment is studied. The renormalization of electric current by the system-environment interaction leads to a direct manifestation of the environment in the bremsstrahlung. The general solution is provided in the absence of an external electromagnetic field, and the spread and decoherence of a wave packet are analyzed.
Article
Chemistry, Physical
E. E. Torres-Miyares, G. Rojas-Lorenzo, J. Rubayo-Soneira, S. Miret-Artes
Summary: Surface diffusion is analyzed in terms of the intermediate scattering function in the time domain and reciprocal space. The open dynamics is studied using the master equation for the reduced density matrix within the Caldeira-Leggett formalism. Several characteristic magnitudes in this decoherence process are investigated. Comparison between analytical results and numerical analysis is also performed.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Shaojie Xiong, Rui Zhang, Bo Liu, Wangjun Lu, Zhe Sun, Xiaoguang Wang
Summary: Distilling quantum coherence is essential for optimizing quantum technologies, but it is not always guaranteed. Thus, probabilistic distillation of quantum coherence has been developed and successfully implemented. We propose a scheme to achieve one-shot coherence distillation in a superconducting circuit system. By using appropriate incoherent operations, the target maximally coherent state can be extracted from a single prepared state with a finite error tolerance. Our scheme is easy to implement in experiments, requiring only a superconducting qubit as the auxiliary system. Numerical simulations under typical experimental conditions show that the distillation rate of coherence resource can be well achieved with current techniques.
RESULTS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Maxim A. Gavreev, Evgeniy O. Kiktenko, Alena S. Mastiukova, Aleksey K. Fedorov
Summary: Decoherence is a fundamental obstacle in quantum information processing devices. This study focuses on the problem of transmitting quantum states from one place to another and proposes a method using unitary operations to protect quantum states against decoherence. The approach is shown to be effective in both theoretical and real experiments, suggesting its usefulness in analyzing the capabilities of quantum information processing devices. The study also demonstrates how the approach can be applied to suppress decoherence in distributing quantum states over remote physical qubits.
Article
Physics, Multidisciplinary
A. Plunkett, M. A. Alarcon, J. K. Wood, C. H. Greene, A. Sandhu
Summary: Photoelectron interferometry with femtosecond and attosecond light pulses provides high temporal and spectral resolution. By stimulating Raman interferences and monitoring the modification of electron yield, we resolved the electronic composition and time evolution of autoionizing states in argon, with remarkable agreement between experimental and theoretical results.
PHYSICAL REVIEW LETTERS
(2022)
Article
Instruments & Instrumentation
D. Uhl, L. Bruder, F. Stienkemeier
Summary: This paper introduces a cost-effective, fully software-based lock-in amplifier for nonlinear spectroscopy applications, with comparable performance to commercial devices and advantages in data analysis flexibility and channel up-scaling.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Physics, Multidisciplinary
Rahma Abdelmagid, Khadija Alshehhi, Gehad Sadiek
Summary: This study examines the dynamics of entanglement between two interacting asymmetric two-level atoms in the presence of decoherence. The results show that the initial state and degree of anisotropy can affect the decay rate of entanglement, while a correlated dephasing environment can enhance the entanglement dynamics.
Article
Multidisciplinary Sciences
Dorje C. Brody, Anthony J. Trewavas
Summary: This article discusses the efficient processing of environmental information by plants and suggests that differential efficiency may explain differences in survival among species. The primary routes of information transfer are well understood, but the importance of information erasure is not fully recognized. Plants live in a noisy environment, and quantum theory of open systems can provide a useful analogy. The article develops this theme from quantum information processing and proposes a method to transfer quantum characteristics to biological dynamics.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Astronomy & Astrophysics
Kenzo Ishikawa, Kenji Nishiwaki, Kin-ya Oda
Summary: In this paper, calculations of wave-packet amplitudes for the two-body scattering process phi phi -> phi -> phi phi are reported, along with the elucidation of the decay amplitude of phi -> phi phi. The time boundaries for the initial and final configurations are explored, and it is demonstrated that the effect of the in-time boundary of phi -> phi phi emerges from phi phi -> phi -> phi phi without any prior assumptions. This overlooked effect in the standard plane-wave formulation can have significant implications across various scientific areas, and its result is confirmed through different integration orders, also interpreted as a Stokes phenomenon in the Lefschetz-thimble decomposition.
Article
Physics, Fluids & Plasmas
Yicheng Zhang, Lev Vidmar, Marcos Rigol
Summary: This study investigates the statistical properties of off-diagonal matrix elements of observables in the energy eigenstates of integrable quantum systems. It is found that these matrix elements are dense in the spin-1/2 XXZ chain, while being sparse in noninteracting systems. The distribution of off-diagonal matrix elements in the quasimomentum occupation of hard-core bosons in one dimension is well described by generalized Gamma distributions, irrespective of translational invariance but not in the presence of localization. Additionally, the off-diagonal matrix elements of observables in the spin-1/2 XXZ model can be well described by a generalized Gamma distribution.
Article
Physics, Multidisciplinary
F. Shojaei Arani, M. Bagheri Harouni, Brahim Lamine, Alain Blanchard
Summary: Based on the analogy of optical medium, a formalism is established to describe the interaction between an electromagnetic system and a background of gravitational waves (GWs). By studying the classical treatment of the electromagnetic-GW interaction and finding the mode-functions of the electromagnetic field in the presence of magneto-dielectric media caused by GWs, the quantum interaction Hamiltonian is obtained. The results show that inflationary primordial gravitational waves act as a decoherence mechanism that destroys electromagnetic coherency after a characteristic time scale.
Article
Chemistry, Physical
Amitav Sahu, Vivek N. Bhat, Sanjoy Patra, Vivek Tiwari
Summary: Fluorescence-detected multidimensional electronic spectroscopy (fMES) is a promising spectroscopic approach that combines the advantages of MES with the spatial resolution of a microscope. In this study, we present a visible white light continuum-based fMES spectrometer and explore the sensitivity enhancement expected from fluorescence detection. By combining biased sampling and rapid scan of pump-probe waiting time T, we achieve high sensitivity and demonstrate room temperature two-dimensional coherence maps of vibrational quantum coherences at optical densities lower than conventional approaches.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Review
Chemistry, Physical
HeeBong Yang, Na Young Kim
Summary: NISQ is an acronym for noisy intermediate-scale quantum, which represents the current era of quantum information processing (QIP) technologies. QIP science and technologies aim to achieve unprecedented performance in computation, communications, simulations, and sensing by exploiting the principles of quantum mechanics. This review explores noisy processes in quantum architectures and discusses research on noise reduction methods for building advanced, large-scale quantum technologies in the future.
Article
Physics, Multidisciplinary
Heng-Na Xiong, Lingfeng Li, Zhe Sun, Zejin Yang, Zichun Le, Yixiao Huang, Xiaoguang Wang
Summary: In this study, we investigate the preservation of quantum information in two maximally entangled qubits inside a photonic-crystal waveguide. We find that the preservation of information is weakened by the position and frequency detuning of the qubits in strong couplings. However, high information preservation can be achieved by choosing suitable positions and frequencies, regardless of weak or strong couplings.
NEW JOURNAL OF PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Jasvith Raj Basani, Sri Krishna Vadlamani, Saumil Bandyopadhyay, Dirk R. R. Englund, Ryan Hamerly
Summary: This paper presents a novel architecture for multiport interferometers based on the sine-cosine fractal decomposition of a unitary matrix. The unique self-similarity and modularity of our design offer improved resilience to hardware imperfections compared to conventional multiport interferometers. Numerical simulations show that truncation of these meshes gives robust performance even under large fabrication errors, making it a significant advancement in large-scale programmable photonics for practical machine learning and quantum computing applications.
Article
Materials Science, Multidisciplinary
Hiroyuki Katsuki, Kenzo Ohmori, Toru Horie, Hisao Yanagi, Kenji Ohmori
Article
Chemistry, Physical
Hiroyuki Katsuki, Kenji Ohmori
JOURNAL OF CHEMICAL PHYSICS
(2016)
Editorial Material
Optics
Kenji Ohmori, Guido Pupillo, Joseph Thywissen, Matthias Weidemueller
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2016)
Article
Multidisciplinary Sciences
Nobuyuki Takei, Christian Sommer, Claudiu Genes, Guido Pupillo, Haruka Goto, Kuniaki Koyasu, Hisashi Chiba, Matthias Weidemueller, Kenji Ohmori
NATURE COMMUNICATIONS
(2016)
Editorial Material
Optics
Kenji Ohmori, Guido Pupillo, Joseph H. Thywissen, Matthias Weidemuller
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2018)
Review
Chemistry, Multidisciplinary
Hiroyuki Katsuki, Nobuyuki Takei, Christian Sommer, Kenji Ohmori
ACCOUNTS OF CHEMICAL RESEARCH
(2018)
Article
Physics, Multidisciplinary
Kenji Ohmori
FOUNDATIONS OF PHYSICS
(2014)
Article
Chemistry, Physical
Timm Bredtmann, Hiroyuki Katsuki, Joern Manz, Kenji Ohmori, Christian Stemmle
Article
Chemistry, Physical
Yukiyoshi Ohtsuki, Haruka Goto, Hiroyuki Katsuki, Kenji Ohmori
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2014)
Article
Physics, Multidisciplinary
ChunMei Liu, Joern Manz, Kenji Ohmori, Christian Sommer, Nobuyuki Takei, Jean Christophe Tremblay, Yichi Zhang
PHYSICAL REVIEW LETTERS
(2018)
Article
Physics, Multidisciplinary
M. Mizoguchi, Y. Zhang, M. Kunimi, A. Tanaka, S. Takeda, N. Takei, V Bharti, K. Koyasu, T. Kishimoto, D. Jaksch, A. Glaetzle, M. Kiffner, G. Masella, G. Pupillo, M. Weidemueller, K. Ohmori
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Hiroyuki Katsuki, Yukiyoshi Ohtsuki, Toru Ajiki, Haruka Goto, Kenji Ohmori
Summary: Researchers have developed a universal method to retard or advance the dispersion of a quantum wave packet by inducing programmable time shift with a strong nonresonant femtosecond laser pulse. Numerical simulations have confirmed that a sequence of such retardation pulses can halt wave-packet dispersion.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Optics
Yukiyoshi Ohtsuki, Tomotaro Namba, Hiroyuki Katsuki, Kenji Ohmori
Summary: Through control and simulation of the vibrational wave packet, it is concluded that a simple periodic NIR pulse train can almost perfectly stop the wave-packet spreading over a long period, provided that the degree of spreading is not too large.
Article
Optics
Christian Sommer, Guido Pupillo, Nobuyuki Takei, Shuntaro Takeda, Akira Tanaka, Kenji Ohmori, Claudiu Genes
Proceedings Paper
Engineering, Electrical & Electronic
H. Mizuno, H. Katsuki, H. Yanagi, F. Sasaki, S. Hotta, K. Ohmori
2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR)
(2013)