Article
Quantum Science & Technology
Wei Ye, Ying Guo, Huan Zhang, Shoukang Chang, Ying Xia, Sha Xiong, Liyun Hu
Summary: We propose a theoretical scheme for generating a novel kind of non-Gaussian state by using coherent superposition of photon subtraction and addition on each mode of an input two-mode squeezed coherent state. The simulation results showed that the increase in coherent amplitudes of the CS-based TMSC is beneficial for improving the nonclassicality compared to the TMSC case. We also analyze the entanglement of the proposed CS-based TMSC and its applications in quantum teleportation. The proposed state demonstrates distinct advantages over other non-Gaussian states in terms of optimal entanglement and fidelity at small-initial squeezing ranges.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Physics, Multidisciplinary
Wei Qin, Adam Miranowicz, Franco Nori
Summary: This article proposes a method to overcome the limitation of cavity-field squeezing by using a fully quantum degenerate parametric amplifier (DPA). By applying a two-tone driving to the signal mode, the pump mode can be driven into a squeezed steady state with arbitrary high squeezing. Additionally, the intracavity squeezing can exponentially increase the signal-to-noise ratio and significantly improve measurement error.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
A. Beguin, T. Rodzinka, L. Calmels, B. Allard, A. Gauguet
Summary: In this work, we report the realization of light-pulse atom interferometers with large-momentum-transfer atom optics based on a sequence of Bragg transitions. Momentum splitting up to 200 photon recoils is demonstrated in an ultracold atom interferometer. We highlight a new mechanism of destructive interference of the losses that leads to a significant efficiency enhancement of the beam splitters. A comprehensive study of parasitic interferometers due to the inherent multiport feature of the quasi-Bragg pulses is performed. Finally, the phase shift enhancement is experimentally verified, and the interferometer visibility loss is characterized.
PHYSICAL REVIEW LETTERS
(2023)
Article
Mechanics
Jacob R. Gissinger, Alexander Z. Zinchenko, Robert H. Davis
Summary: A fully three-dimensional boundary-integral method (BIM) has been developed to study the interaction of drops with arbitrary surfaces in a uniform flow field, with two new methods proposed for accurate calculation of highly singular surface integrals. The study shows that different shapes of particles can significantly affect the behavior of droplets, with variations in lubrication and squeezing observed when drops pass through different types of channels. The research also demonstrates non-symmetrical flow rectification for non-axisymmetric particles.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Optics
S. Kannan, C. Sudheesh
Summary: This study classified the superposition of squeezed wavepackets into two kinds and examined their quadrature squeezing. It was found that squeezing and higher-order squeezing disappear for the states of the first kind, while the second kind allows achieving maximum squeezing by adjusting parameters. The absence of squeezing in the superposition states is explained through the expectation value of energy density.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2022)
Article
Quantum Science & Technology
Masashi Ban
Summary: In this study, the quantumness of a two-level system interacting with one of two environments in an indefinite way is investigated by analyzing the violation of temporal steering inequalities. The results show that the coherent superposition of the two environments can enhance the quantumness of the two-level system, and the effective parameter regions for enhancing quantumness are identified.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Physics, Multidisciplinary
M. A. A. Rahim, C. H. Raymond Ooi, M. A. R. Othman
Summary: Non-classical states induced from coherent states via photon addition operations have improved performances in quantum information processing, exhibiting stronger quadrature squeezing, anti-bunching and sub-Poisson effects. The superposition of displaced n-photon Fock states and n-photon added coherent states results in a new state, superposed-n-DPFS-n-PACS, with enhanced non-classicality due to quantum interference effects. Furthermore, using these states in a Mach-Zehnder interferometer enhances phase sensitivity beyond the standard quantum limit.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
Article
Optics
Tommaso Roscilde, Fabio Mezzacapo, Tommaso Comparin
Summary: The research proves two simple theorems about squeezing induced by bilinear spin-spin interactions that conserve spin parity, which applies to the vast majority of quantum spin models implemented by state-of-the-art quantum simulators. It shows that squeezing captures the first form of quantum correlations whether they are produced at equilibrium or away from equilibrium by manipulating the spin-spin interactions.
Article
Materials Science, Multidisciplinary
Luping Zhang, Fang Jia, Huan Zhang, Wei Ye, Ying Xia, Liyun Hu, Jiehui Huang
Summary: This study proposes a scheme for improving entanglement using number-conserving generalized superposition of products (GSP) operation. It is found that both single-mode and two-mode-symmetric GSP operations can effectively enhance entanglement. Compared to other non-Gaussian operations, this scheme shows better entanglement performance at a small amplitude level. In addition, when used for teleportation, this scheme achieves the optimal teleportation fidelity.
RESULTS IN PHYSICS
(2022)
Article
Multidisciplinary Sciences
Richard J. Fletcher, Airlia Shaffer, Cedric C. Wilson, Parth B. Patel, Zhenjie Yan, Valentin Crepel, Biswaroop Mukherjee, Martin W. Zwierlein
Summary: The research establishes the equivalence between particles under rotation and charged particles in a magnetic field, exploring the spatial relationships in the system through quantum mechanics. They successfully implemented squeezing of this geometric quantum uncertainty, achieving significant results in a rotating Bose-Einstein condensate.
Article
Physics, Multidisciplinary
T. Hernandez Yanes, M. Plodzien, M. Mackoit Sinkeviciene, G. Zlabys, G. Juzeliunas, E. Witkowska
Summary: This study demonstrates the activation of spin-squeezing protocols to generate correlated many-body quantum states in a system of ultracold atomic fermions using position-dependent laser coupling.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Sakshi Rao, Preeti Sharma, Bhaskar Kanseri
Summary: This study investigates the behavior of squeezing in combined quadratures of biphotons generated by partially coherent pump beams in the spatial, temporal, and spatiotemporal domains compared to fully coherent beams. The findings suggest that by optimizing the pump field amplitude, interaction length, and degree of coherence, a squeezed state with partially coherent properties can be generated.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Nidhin Prasannan, Jan Sperling, Benjamin Brecht, Christine Silberhorn
Summary: We report on the nonlinear squeezing effects of polarization states of light achieved by utilizing click-counting measurements and the intrinsic correlations of a polarization-entangled light source. By deriving theoretical bounds for nonlinear Stokes operators and developing an efficient light source and detection system, we experimentally validate our theoretical predictions and demonstrate highly statistically significant nonclassical correlations.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Andrey R. Kolovsky
Summary: This study analyzes Josephson's oscillation of Bose particles in an open two-site Bose-Hubbard system, observing the main mechanism for the decay of the oscillation using a special protocol for external driving. An analytical estimate for the decay time is obtained.
Article
Physics, Multidisciplinary
Mingjie Xin, Wui Seng Leong, Zilong Chen, Yu Wang, Shau-Yu Lan
Summary: The study demonstrates the generation of squeezed states of atomic motion by suddenly changing the harmonic oscillation frequency of atoms in an optical lattice, leading to rapid quantum amplification. This technology can speed up quantum gates and enable quantum sensing and quantum information processing in noisy environments.
PHYSICAL REVIEW LETTERS
(2021)
