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Article
Physics, Multidisciplinary
Katja Kustura et al.
Summary: The article presents how to engineer and utilize unstable multimode dynamics in a linear optomechanical system to induce strong mechanical squeezing.
PHYSICAL REVIEW LETTERS
(2022)
Article
Quantum Science & Technology
Louis Garbe et al.
Summary: Phase transitions are vital tools for classical and quantum sensing applications. A comprehensive analysis of different protocols reveals the existence of universal precision scaling regimes, even for finite-time protocols and finite-size systems. These results have significant theoretical implications for quantum metrology.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Karol Gietka et al.
Article
Physics, Multidisciplinary
Zu-Jian Ying et al.
Summary: The quantum Rabi model with linear coupling exhibits a second-order phase transition at zero mode frequency, enhancing quantum metrology in few-body systems. However, the inclusion of a nonlinear coupling term in the model leads to a first-order-like phase transition at finite frequency, resulting in higher measurement precision and avoiding the detrimental slowing-down effect near the critical point. When a bias term is added, the system can be used as a fluxmeter or magnetometer in circuit QED platforms.
Article
Physics, Multidisciplinary
Simone Colombo et al.
Summary: The protocol based on time-reversal operations with cold atoms overcomes the standard quantum limit and achieves the greatest phase sensitivity improvement in any full Ramsey interferometer. By implementing a time-reversal protocol in an optically engineered many-body spin Hamiltonian, a quantum measurement with non-Gaussian states beyond the readout scheme's limit is demonstrated.
Article
Physics, Multidisciplinary
Dong-Sheng Ding et al.
Summary: This research demonstrates the enhanced sensitivity of many-body critical systems to small variations in external parameters in a non-equilibrium Rydberg atomic gas. By quantifying the Fisher information, it is shown that many-body effects lead to a three orders of magnitude increase in sensitivity compared to single-particle systems.
Article
Physics, Multidisciplinary
T. Hernandez Yanes et al.
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
Physics, Multidisciplinary
Enes Aybar et al.
Article
Physics, Multidisciplinary
Louis Garbe et al.
Summary: This work presents a scheme where the quantum Fisher information exhibits exponential growth with the duration of the protocol by performing periodic modulation of the coupling of a quantum critical system near its critical value. Numerical simulations demonstrate the robustness of the exponential time scaling against dissipation.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Multidisciplinary
Karol Gietka
Summary: In quantum metrology, correlations among atoms or photons are typically created to improve measurement precision. In this study, we demonstrate the use of other excitations, such as center-of-mass excitations of a spin-orbit coupled Bose-Einstein condensate and a Coulomb crystal, to perform quantum-enhanced measurements. We also propose a method to simulate homodyne detection of these center-of-mass excitations, which is crucial for optimal estimation.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Optics
Karol Gietka
Summary: This article presents an alternative protocol for preparing critical states that benefits from critical speeding up rather than critical slowing down, achieved by moving away from the critical point. The protocol is applied to quantum Rabi model, its classical oscillator limit, and the Lipkin-Meshkov-Glick model. The adiabatic speed-up protocol is discussed in quantum metrology and compared to critical quantum metrology, showing that critical quantum metrology is a suboptimal strategy. The article concludes that systems exhibiting a phase transition are interesting in quantum technologies, but the critical point may not be the most important aspect.
Article
Quantum Science & Technology
Theodoros Ilias et al.
Summary: This study proposes a protocol for criticality-enhanced sensing by continuously observing the emitted radiation quanta. The study establishes a scaling theory for the global quantum Fisher information and derives universal scaling laws related to critical exponents. The findings suggest that the precision scaling of continuous detection of emitted quanta exceeds that of direct measurement, indicating the metrological value of this approach in dissipative criticality.
Article
Quantum Science & Technology
Karol Gietka et al.
Summary: The quantum Fisher information in adiabatic critical quantum metrology cannot reach the Heisenberg limit of precision, making regular quantum metrology superior under optimal settings. Shortcuts to adiabaticity can decrease the preparation time of critical ground states, but they cannot achieve or surpass the Heisenberg limit for quantum parameter estimation.
Article
Physics, Multidisciplinary
Anjun Chu et al.
Summary: The article introduces a protocol for interferometric measurements utilizing cold atoms in an optical lattice, enhancing sensitivity and reducing measurement time through a series of techniques, making it suitable for short-range force sensing.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Karol Gietka et al.
Summary: A novel composite light-matter magnetometer is proposed, using a multi-component Bose-Einstein condensate coupled to two distinct electromagnetic modes of a linear cavity for magnetic field measurement. The sensitivity of this magnetometer exhibits Heisenberg-like scaling with respect to the atom number, with a calculated lower bound for sensitivity at the order of fT (root Hz(-1))(-1) -pT (root Hz)(-1) for a condensate of 10(4) atoms with coherence times on the order of several ms under state-of-the-art experimental parameters.
NEW JOURNAL OF PHYSICS
(2021)
Article
Quantum Science & Technology
Ran Liu et al.
Summary: The study introduces a critical quantum metrology technique using an adiabatic scheme on a first-order quantum phase transition, encoding an unknown parameter and tuning the energy gap by introducing a small transverse magnetic field. Experimental implementation using nuclear magnetic resonance techniques shows high precision achieving Heisenberg scaling at the critical point.
NPJ QUANTUM INFORMATION
(2021)
Article
Physics, Multidisciplinary
T. Weiss et al.
Summary: This study proposes the optimal control of the harmonic potential of a levitated nanoparticle to quantum delocalize its center-of-mass motional state to a length scale orders of magnitude larger than the quantum zero-point motion. The fast loop protocol can be used to enhance force sensing and significantly increase the entangling rate of weakly interacting nanoparticles. The performance of the protocol is parameterized as a function of displacement and frequency noise in the nanoparticle's center-of-mass motion, accounting for sources of decoherence in current experiments.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Fluids & Plasmas
Karol Gietka et al.
Summary: This study demonstrates that the dynamics of the Dicke model can be described by an inverted harmonic oscillator model for a limited time after a quench from the ground-state configuration to the superradiant phase, which approaches infinity in the thermodynamic limit. This mechanism can also be applied to describe dynamical quantum phase transitions in other systems, offering an opportunity for simulations of physical phenomena associated with an inverted harmonic oscillator.
Article
Optics
Safoura S. Mirkhalaf et al.
Summary: The study shows that the estimation of the control parameter in a ferromagnetic Bose-Einstein condensate exhibits the same scaling beyond the standard quantum limit near critical points and away from critical points. Depletion of the m(f) = 0 Zeeman sublevel and transverse magnetization are identified as signals capable of saturating sensitivity scaling. The results suggest the feasibility of sub-standard quantum limit sensing in ferromagnetic condensates with current experimental capabilities.
Review
Physics, Condensed Matter
Farokh Mivehvar et al.
Summary: The field of quantum-gas cavity QED has rapidly evolved over the past decade, offering opportunities to implement, simulate, and experimentally test fundamental solid-state Hamiltonians as well as non-equilibrium many-body phenomena. Notable experiments have observed various phenomena by designing and controlling photon-induced tunable-range interactions in open quantum environments.
ADVANCES IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
Louis Garbe et al.
PHYSICAL REVIEW LETTERS
(2020)
Article
Optics
Safoura S. Mirkhalaf et al.
Article
Physics, Multidisciplinary
Karol Gietka et al.
PHYSICAL REVIEW LETTERS
(2019)
Article
Computer Science, Interdisciplinary Applications
Sebastian Kraemer et al.
COMPUTER PHYSICS COMMUNICATIONS
(2018)
Article
Physics, Multidisciplinary
Luca Pezze et al.
REVIEWS OF MODERN PHYSICS
(2018)
Article
Physics, Multidisciplinary
Samuel P. Nolan et al.
PHYSICAL REVIEW LETTERS
(2017)
Article
Physics, Multidisciplinary
Junru Li et al.
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Multidisciplinary
Florian Froewis et al.
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Multidisciplinary
D. Linnemann et al.
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Multidisciplinary
Emily Davis et al.
PHYSICAL REVIEW LETTERS
(2016)
Article
Quantum Science & Technology
Tomasz Wasak et al.
QUANTUM INFORMATION PROCESSING
(2016)
Review
Physics, Multidisciplinary
Yongping Zhang et al.
FRONTIERS OF PHYSICS
(2016)
Article
Physics, Multidisciplinary
Myung-Joong Hwang et al.
PHYSICAL REVIEW LETTERS
(2015)
Article
Physics, Multidisciplinary
Helmut Ritsch et al.
REVIEWS OF MODERN PHYSICS
(2013)
Article
Multidisciplinary Sciences
Rafal Demkowicz-Dobrzanski et al.
NATURE COMMUNICATIONS
(2012)
Article
Multidisciplinary Sciences
M. Napolitano et al.
Article
Multidisciplinary Sciences
Y. -J. Lin et al.
Review
Optics
Vittorio Giovannetti et al.
Review
Physics, Multidisciplinary
Jian Ma et al.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2011)
Review
Physics, Multidisciplinary
K-A Brickman Soderberg et al.
REPORTS ON PROGRESS IN PHYSICS
(2010)
Article
Physics, Multidisciplinary
Cheng Chin et al.
REVIEWS OF MODERN PHYSICS
(2010)
Article
Physics, Multidisciplinary
Luca Pezze et al.
PHYSICAL REVIEW LETTERS
(2009)
Article
Physics, Multidisciplinary
V Giovannetti et al.
PHYSICAL REVIEW LETTERS
(2006)
Article
Multidisciplinary Sciences
B Paredes et al.
