Article
Optics
Zhucheng Zhang, Lei Shao, Wangjun Lu, Xiaoguang Wang
Summary: The article proposes an all-optical scheme for deterministically preparing squeezed Schrödinger-cat states with high speed and applicability to other physical platforms. It shows that control of driving fields can accelerate the generation of squeezed Schrödinger-cat states and allows for accurate phase estimation in optical interferometers.
Article
Multidisciplinary Sciences
Veysel Bayrakci, Fatih Ozaydin
Summary: This article proposes an entanglement swapping protocol based on quantum Zeno effect, which achieves almost unit fidelity with simple frequent threshold measurements and single particle rotations. The protocol can be extended to a series of repeater stations to construct quantum Zeno repeaters, which also achieve almost unit fidelity regardless of the number of repeaters, reducing the quantum circuit complexity of quantum repeaters.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Dan Cogan, Zu-En Su, Oded Kenneth, David Gershoni
Summary: Entanglement between particles is crucial for quantum technology, and entanglement between light particles is particularly important for quantum communication. The generation of entangled multiphoton cluster states is essential for communication between quantum nodes. In this study, a multi-indistinguishable photon cluster is generated from a quantum dot with a continuously generated string of photons at deterministic rates and an optimized entanglement length of about ten photons. The indistinguishability of the photons opens up new possibilities for scaling up the cluster's dimensionality by fusion.
Article
Optics
Y. Chew, T. Tomita, T. P. Mahesh, S. Sugawa, S. de Leseleuc, K. Ohmori
Summary: Rydberg atoms show promise for ultrafast quantum operations, but strong interactions between single atoms have been challenging to harness. The authors introduce novel techniques to trap and cool atoms, and use laser pulses to excite them to a Rydberg state. Ultrafast energy exchange and conditional phase are observed.
Article
Multidisciplinary Sciences
Avikar Periwal, Eric S. Cooper, Philipp Kunkel, Julian F. Wienand, Emily J. Davis, Monika Schleier-Smith
Summary: Interactions play a crucial role in controlling the flow of information and creating correlations in many-body quantum systems. By programming non-local interactions in an array of atomic ensembles within an optical cavity, researchers have been able to access effective geometries with different dimensions and topologies than the physical geometry of the array. This work has implications for simulating frustrated magnets, investigating quantum optimization paradigms, and engineering entangled resource states for sensing and computation.
Article
Computer Science, Information Systems
Seid Koudia, Angela Sara Cacciapuoti, Marcello Caleffi
Summary: This paper presents a novel scheme for deterministic generation of different classes of multipartite entangled states without requiring direct interaction between qubits. The scheme utilizes the coherent control of the causal order among unitaries acting on the qubits according to the indefinite causal order framework. The paper analyzes the conditions for deterministic generation and provides examples for practical implementation of unitaries. The scalability of the proposed scheme to higher dimensional genuine multipartite entanglement states and potential applications in quantum networks are also discussed.
Article
Optics
Jie Peng, Jianing Tang, Pinghua Tang, Zhongzhou Ren, Junlong Tian, Nancy Barraza, Gabriel Alvarado Barrios, Lucas Lamata, Enrique Solano, F. Albarran-Arriagada
Summary: In this study, we propose a high-quality deterministic single-photon source that can emit two single photons with any time separation. By utilizing special solutions and adiabatic evolutions, this proposal can be achieved rapidly, taking advantage of the ultrastrong coupling.
Article
Multidisciplinary Sciences
Cen-Xiao Huang, Xiao-Min Hu, Bi-Heng Liu, Lan Zhou, Yu-Bo Sheng, Chuan-Feng Li, Guang-Can Guo
Summary: In this work, the first experimental demonstration of deterministic entanglement purification using polarization and spatial mode hyperentanglement is reported. The fidelity of polarization entanglement is significantly improved after purification, and the purification efficiency is greatly increased with the assistance of robust spatial mode entanglement. This work is of great importance for long-distance communications and quantum networks.
Article
Optics
Wen-Hao Zhou, Zhi-Qiang Jiao, Hang Li, Jun Gao, Xiao-Wei Wang, Ruo-Jing Ren, Xiao-Yun Xu, Lu-Feng Qiao, Xian-Min Jin
Summary: Researchers propose and experimentally demonstrate heralded multipartite entanglements on a three-dimensional photonic chip. By controlling the coherent evolution of a single photon in multiple spatial modes, they dynamically tune the high-order W-states of different orders in a single photonic chip. Using an effective witness, they observe and verify 61-partite quantum entanglements in a 121-site photonic lattice. These results offer insights into the accessible size of quantum entanglements and may advance large-scale quantum information processing applications.
Article
Chemistry, Multidisciplinary
Fatih Ozaydin, Veysel Bayrakci, Azmi Ali Altintas, Cihan Bayindir
Summary: In this work, we show that the superactivation of bound entanglement in a quantum network can be achieved by implementing local quantum Zeno strategies based on single qubit rotations and simple threshold measurements. We obtain a two-qubit distillable entanglement system and demonstrate the feasibility of superactivation in an eight-qubit network. In addition, we design a general algorithm for optimizing the quantum Zeno dynamics tasks and show that significant improvement can be obtained by driving the initial bound entanglement system into a maximally entangled state.
APPLIED SCIENCES-BASEL
(2023)
Article
Physics, Multidisciplinary
Francisco Andres Cardenas-Lopez, Juan Carlos Retamal, Xi Chen
Summary: The reverse-engineering approach is proposed to design the longitudinal coupling between qubits and field modes, achieving a fast generation of multi-partite quantum gates in photonic or qubit-based architectures. The study shows that the generation time is at the nanosecond scale and does not depend on the number of system components. Furthermore, the protocol is not significantly affected by dissipative dynamics. The possible implementation with circuit quantum electrodynamics architecture is discussed.
COMMUNICATIONS PHYSICS
(2023)
Article
Physics, Multidisciplinary
Dylan Herman, Ruslan Shaydulin, Yue Sun, Shouvanik Chakrabarti, Shaohan Hu, Pierre Minssen, Arthur Rattew, Romina Yalovetzky, Marco Pistoia
Summary: This paper presents an approach that combines quantum Zeno dynamics with common quantum optimization algorithms (such as QAOA) to solve optimization problems with multiple arbitrary constraints on quantum computers. The authors introduce a technique that uses quantum Zeno dynamics to efficiently restrict the dynamics of quantum optimization to the in-constraint subspace on a fault-tolerant quantum computer, requiring only a small number of auxiliary qubits and no post-selection. They demonstrate the broad applicability of their technique by incorporating it into the quantum approximate optimization algorithm (QAOA) and variational quantum circuits for optimization. Numerical evaluations and a proof-of-concept demonstration on a quantum processor show the superiority of their method compared to state-of-the-art techniques in solving portfolio optimization problems with multiple realistic constraints.
COMMUNICATIONS PHYSICS
(2023)
Article
Optics
Guo-Qiang Zhang, Wei Feng, Wei Xiong, Qi-Ping Su, Chui-Ping Yang
Summary: Recently, dissipative coupling was discovered, which provides new methods for controlling and utilizing light-matter interactions. In this study, we propose a scheme to generate the tripartite W state in a dissipatively coupled system, where one qubit and two resonators simultaneously interact with a common reservoir. By driving the qubit, the system evolves from the ground state to the tripartite W state, which has a long lifetime due to decoupling from the reservoir. This scheme is applicable to a wide range of dissipatively coupled systems and can be specifically applied to a hybrid qubit-photon-magnon system.
Article
Optics
Shi-fan Qi, Jun Jing
Summary: We propose a concise and deterministic protocol to generate NOON states in a hybrid system using Floquet engineering. Our protocol is based on a superconducting qubit, a circuit resonator mode, and two magnonic modes. We show that an arbitrary magnonic NOON state can be generated by a typical preparing and-measurement procedure. We also analyze the robustness of our protocol against various systematic errors.
Article
Physics, Multidisciplinary
R. Rossi Jr
Summary: This paper presents a quantum-like cognitive model that predicts the slowdown of opinion change, with measurement postulate representing a decision. Experimental results confirm the equivalence between projective and dynamical accounts, which can slow down opinion change in the model. The predicted slowdown can be observed for a wide range of parameter values.
Article
Optics
Sebastien Garcia, Francesco Ferri, Jakob Reichel, Romain Long
Article
Instruments & Instrumentation
Francesco Ferri, Sebastien Garcia, Mohamed Baghdad, Jakob Reichel, Romain Long
REVIEW OF SCIENTIFIC INSTRUMENTS
(2020)
Article
Physics, Multidisciplinary
Jorge Mellado Munoz, Xi Wang, Thomas Hewitt, Anna U. Kowalczyk, Rahul Sawant, Giovanni Barontini
PHYSICAL REVIEW LETTERS
(2020)
Article
Neurosciences
Anna U. Kowalczyk, Yulia Bezsudnova, Ole Jensen, Giovanni Barontini
Summary: Optically Pumped Magnetometers (OPMs) are considered the future of human magnetoencephalography due to their flexibility and adaptability. This study detected auditory evoked brain fields using an OPM based on the nonlinear magneto-optical rotation (NMOR) technique, showcasing excellent performance in non-zero magnetic field environments. Our results demonstrate promising progress towards resilient OPM-based magnetoencephalography systems.
Article
Chemistry, Multidisciplinary
Rahul Sawant, Anna Maffei, Giovanni Barontini
Summary: The study shows that by interacting with a thermal bath of ultracold atoms, a trapped single atom can reach thermal equilibrium and be cooled. Monte Carlo simulations demonstrate the feasibility of using this method within experimental limitations to achieve cooling of the trapped atom.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Alexis Morvan, Mathieu Fechant, Gianluca Aiello, Julien Gabelli, Jerome Esteve
Summary: Honeycomb lattices for microwave photons with frequency imbalance show topological valley edge states at the interface between lattices with opposite imbalance. The spatial dependence of modes along the interface is imaged to obtain the dispersion relation, which is compared to predictions of an ab initio tight-binding model for the microwave photonic lattices.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Physics, Multidisciplinary
Francesco Fogliano, Benjamin Besga, Antoine Reigue, Philip Heringlake, Laure Mercier de Lepinay, Cyril Vaneph, Jakob Reichel, Benjamin Pigeau, Olivier Arcizet
Summary: The researchers enhanced the optomechanical interaction strength by using nanowires and mapping the interaction within the cavity. They explored the optical force field on the nanowires and demonstrated the detection of variations in cavity photon numbers smaller than unity.
Article
Physics, Multidisciplinary
Francesco Ferri, Arthur La Rooij, Claire Lebouteiller, Pierre-Antoine Bourdel, Mohamed Baghdad, Sylvain Schwartz, Sebastien Garcia, Jakob Reichel, Romain Long
Summary: We have developed a simple method to transport ultracold atoms to a microscopic device, such as a Fabry-Perot microcavity, with high efficiency and accuracy. By moving an optical dipole trap and adding a guiding beam, we achieve precise positioning of the atomic cloud within the microcavity, allowing for further manipulation.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Y. S. S. Patil, J. Yu, S. Frazier, Y. Wang, K. Johnson, J. Fox, J. Reichel, J. G. E. Harris
Summary: In this study, single photon detectors are used to investigate the motional state of a superfluid He-4 resonator with a mass of about 1 ng. The arrival times of Stokes and anti-Stokes photons, scattered by the acoustic mode of the resonator, are utilized to measure the resonator's phonon coherences up to the fourth order. By selecting specific photon detection events, the coherences in the resonator are also measured when <= 3 phonons are added or subtracted. These measurements are consistent with the predictions assuming a Markovian coupling between the acoustic mode and a thermal bath.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Gianluca Aiello, Mathieu Fechant, Alexis Morvan, Julien Basset, Marco Aprili, Julien Gabelli, Jerome Esteve
Summary: We demonstrate a new approach to dissipation engineering by utilizing photoassisted tunneling to control the number of lost photons, providing new possibilities for quantum state manipulation in superconducting circuits.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Alexis Morvan, Mathieu Fechant, Gianluca Aiello, Julien Gabelli, Jerome Esteve
Summary: This study designs various honeycomb lattices for microwave photons in the 4 to 8 GHz band using superconducting spiral resonators. The eigenmodes of these photonic lattices are imaged using a scanning laser technique, and their measured bands are in excellent agreement with theoretical models.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Multidisciplinary
J. Basset, O. Stanisavljevic, M. Kuzmanovic, J. Gabelli, C. H. L. Quay, J. Esteve, M. Aprili
Summary: By investigating the influence of a gate electrode on a metallic-insulator-metal Josephson structure, it is found that high-energy electron leakage triggers a reduction in critical current and results in broadening of the switching histograms. The switching rates can be described well by an activation formula that includes an additional term accounting for the injection of rare high-energy electrons from the gate.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Physics, Multidisciplinary
Aaron Smith, Thomas Easton, Vera Guarrera, Giovanni Barontini
Summary: The research team utilized a superluminescent diode to realize and characterize optical potentials for ultracold atoms, finding that it significantly reduces interference effects while maintaining high intensity and good beam focusing compared to lasers. They demonstrated that these optical potentials can be used to arrange atoms in arbitrary structures and manipulate them dynamically.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Optics
Jorge Mellado Munoz, Rahul Sawant, Anna Maffei, Xi Wang, Giovanni Barontini
Article
Physics, Multidisciplinary
J. Basset, M. Kuzmanovic, P. Virtanen, T. T. Heikkila, J. Esteve, J. Gabelli, C. Strunk, M. Aprili
PHYSICAL REVIEW RESEARCH
(2019)
