Article
Optics
Song Yang, Shengli Zhang
Summary: In this work, we investigate the loophole-free Bell inequality test using a multi-photon subtracted two-mode squeezed state (TMSS). By applying ideal bi-side five-photon subtractions, we achieve a violation of the Bell inequality that approaches Munro's optimal bound. Additionally, we develop a concise phase-space method for deriving the violation of the loophole-free Bell inequality, providing physically implementable states for experimental realization.
Article
Physics, Applied
Zheng-Yin Zhao, Xue-Xiang Xu
Summary: In this paper, we introduce the amplified thermal state (ATS) and study its properties such as light intensity, signal-to-noise ratio (SNR), Fock matrix elements, and Wigner function. We analyze the decoherence in photon-loss channel and find that amplification enhances non-Gaussianity while decoherence leads to a return to a Gaussian state.
MODERN PHYSICS LETTERS B
(2021)
Article
Optics
Tran Quang Dat, Truong Minh Duc
Summary: In this paper, a new type of nonclassical state, called two-mode squeezed vacuum states with superposition of photon-pair addition and subtraction operations (TMSVSs-SPPASOs), is introduced. It is demonstrated that the superposition operations of photon-pair added and subtracted can enhance the degree of entanglement of the TMSVSs-SPPASOs. Furthermore, the EPR correlation and the EPR steering in the TMSVSs-SPPASOs can be improved compared with the original TMSVS.
Article
Optics
Wei Zhang, Dong-Yang Wang, Cheng-Hua Bai, Tie Wang, Shou Zhang, Hong-Fu Wang
Summary: This study proposes a scheme to generate squeezed states of magnon and phonon modes and demonstrates the transfer of squeezing between modes of distinct frequencies in a cavity magnomechanical system. By activating the magnetostrictive force in the ferrimagnet, driven magnon mode can be prepared in a squeezed state and transferred to the cavity mode. Parameters for achieving large squeezing of magnons and phonons in different regimes are given as the principal feature of this scheme, which could potentially extend to hybrid optical systems and facilitate strong mechanical squeezing in cavity magnomechanical systems.
Article
Physics, Multidisciplinary
Wei Ye, Ying Guo, Huan Zhang, Ying Xia, Yun Mao
Summary: The study shows that performing high-order GSP operations on the STS benefits the existence of photon-antibunching effect, sub-Poissonian distribution, and partial negativity of the WF at low squeezing levels. The PSTA-STS outperforms other non-Gaussian resources in terms of sub-Poissonian distribution and partial negativity of the WF.
Article
Optics
Hailong Wang, Zehua Chen, Zhongxing Hiu, Yunpeng Shi, Xiong Zhang, Chunliu Zhao, Shangzhong Jin, Jietai Jing
Summary: In this study, the estimation precision of gain in phase-insensitive amplifiers (PIAs) is theoretically investigated using different scenarios, including vacuum two-mode squeezed state (TMSS), coherent state, and bright TMSS. The research shows that placing the PIA in the auxiliary light beam path is the most robust scheme under noise effects, while using a fictitious beam splitter before the original PIA in the probe light beam path is the most robust against propagation loss and imperfect detection. Optimal intensity difference measurement is confirmed to be an accessible experimental technique for saturating the estimation precision of the bright TMSS. This study opens a new avenue for quantum metrology based on PIAs.
Article
Astronomy & Astrophysics
M. J. Jewell, A. F. Leder, K. M. Backes, Xiran Bai, K. van Bibber, B. M. Brubaker, S. B. Chan, A. Droster, Maryam H. Esmat, Sumita Ghosh, Eleanor Graham, Gene C. Hilton, H. Jackson, Claire Laffan, S. K. Lamoreaux, K. W. Lehnert, S. M. Lewis, M. Malnou, R. H. Maruyama, D. A. Palken, N. M. Rapidis, E. P. Ruddy, M. Simanovskaia, Sukhman Singh, D. H. Speller, Leila R. Vale, H. Wang, Yuqi Zhu, HAYSTAC Collaboration
Summary: In this study, the HAYSTAC experiment's squeezed state receiver was used to search for dark matter axions with masses > 10 mu eV/c2. The experiment included upgrades to improve data acquisition efficiency and increased sensitivity for a faster and more effective search. However, no statistically significant evidence of an axion signal was found in the range 18.44-18.71 mu eV/c2, leading to an aggregate upper limit exclusion at the 90% level on the axion-photon coupling of 2.06 x gKSVZ f.
Article
Optics
Filippus S. Roux
Summary: This article addresses the computational challenges associated with using Wigner functions to identify non-classical properties of states through the use of generating functions. The formal definition and experimental implementation of photon-subtracted states are analyzed, with demonstrations on squeezed thermal and squeezed Fock states. Generating functions are also utilized for photon statistics of these states, revealing various aspects of the parameter dependences.
Article
Optics
Chang Hoong Chow, Boon Long Ng, Christian Kurtsiefer
Summary: The study demonstrates the successful extension of qubit coherence time from microseconds to milliseconds using dynamic decoupling technique on optically trapped rubidium-87 atoms. The observed strong correlation between the motion states of the atom and qubit coherence after refocusing can be utilized for resolving trapping parameters.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Bogomila S. Nikolova, Peter A. Ivanov
Summary: We propose a laser-free method for creating a phonon two-mode squeezed state and a beam-splitter transformation using time-varying electric fields and non-linear couplings between normal modes in a linear ion crystal. We study the quantum metrological capability for parameter estimation of these two quantum states and show that a Heisenberg limit of precision can be achieved when the initial state with n phonons undergoes the beam-splitter transformation. Furthermore, we demonstrate that the phonon non-linearity and the spin-dependent force can be utilized to create a three-qubit Fredkin gate.
Article
Physics, Multidisciplinary
Chandan Kumar, Shikhar Rishabh, Shikhar Arora
Summary: This paper explores the potential advantages of performing non-Gaussian operations on two-mode squeezed thermal (TMST) states for phase estimation, comparing it with the case of two-mode squeezed vacuum (TMSV) states. Realistic models of photon subtraction, addition, and catalysis are considered, and a unified Wigner function of the TMST state after these operations is derived. The results show that non-Gaussian operations on TMST states can enhance phase sensitivity in certain parameter ranges, with photon catalysis being the optimal operation when considering success probability.
ANNALEN DER PHYSIK
(2023)
Article
Multidisciplinary Sciences
Abdel-Baset A. Mohamed, Abdel-Haleem Abdel-Aty, Montasir Qasymeh, Hichem Eleuch
Summary: In this study, we explore the non-local correlation dynamics in a two-dimensional honeycomb lattice of disordered electrons in a Graphene sheet. The results show that the lattice-point interaction affects the Bell-function non-locality and entanglement concurrence, and the uncertainty-induced non-locality correlation is more stable than the Bell non-locality and concurrence.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Multidisciplinary
Mohammad Ehsan Farzan, Mohammad Javad Faghihi, Gholamreza Honarasa
Summary: The paper introduces f-deformed photon-added squeezed Kerr states by applying the f-deformed creation operator to the squeezed Kerr states, showing that various types of nonclassical states can be generated by adjusting controlling parameters. The numerical study of nonclassical properties including photon statistics, squeezing, and Husimi Q distribution function reveals that adding photons enhances the nonclassical behavior of the states, with the operator-valued intensity-dependent function playing a crucial role in unveiling the nonclassical aspects of the system.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Physics, Multidisciplinary
Dmitry A. Kuts, Mikhail S. Podoshvedov, Ba An Nguyen, Sergey A. Podoshvedov
Summary: We propose an efficient method to generate optical analogs of even and odd Schrodinger cat states with large amplitude, high fidelity, and reasonable generation rate.
Article
Optics
Dongmei Han, Fengxiao Sun, Na Wang, Yu Xiang, Meihong Wang, Mingsheng Tian, Qiongyi He, Xiaolong Su
Summary: Remote state preparation allows for the preparation and manipulation of quantum state non-locally. This study presents the experimental preparation of optical cat states remotely using a two-mode Gaussian entangled state in a lossy channel. The remote manipulation of the prepared cat state is demonstrated by changing the measurement basis at Alice's station. The results show the potential for remote hybrid quantum information processing.
LASER & PHOTONICS REVIEWS
(2023)
