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The properties of an exciton in a type II quantum dot are studied under the influence of a perpendicular applied magnetic field. The dot is modelled by a quantum disk with radius $R$, thickness $d$ and the electron is confined in the disk,…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 K. L. Janssens , B. Partoens , F. M. Peeters

We present an experimental demonstration of closed-loop quantum parameter estimation in which real-time feedback is used to achieve robustness to modeling uncertainty. By performing broadband estimation of a magnetic field acting on…

Quantum Physics · Physics 2007-05-23 JM Geremia , John K. Stockton , Hideo Mabuchi

We show how to use two-mode squeezed light to exponentially enhance cavity-based dispersive qubit measurement. Our scheme enables true Heisenberg-limited scaling of the measurement, and crucially, is not restricted to small dispersive…

Quantum Physics · Physics 2015-08-31 Nicolas Didier , Archana Kamal , William D. Oliver , Alexandre Blais , Aashish A. Clerk

Time-domain observations of coherent oscillations between quantum states in mesoscopic superconducting systems were so far restricted to restoring the time-dependent probability distribution from the readout statistics. We propose a new…

Superconductivity · Physics 2009-11-07 Ya. S. Greenberg , A. Izmalkov , M. Grajcar , E. Il'ichev , W. Krech , H. -G. Meyer

Quantum technologies extensively use laser light for state preparation, manipulation, and readout. For field applications, these systems must be robust and compact, driving the need for miniaturized and highly stable optical setups and…

Ensembles of nitrogen-vacancy (NV) centers in diamond are widely used as AC magnetometers. While such measurements are usually performed using standard (XY) dynamical decoupling (DD) protocols at room temperature, we study the sensitivities…

Quantum Physics · Physics 2018-02-14 D. Farfurnik , A. Jarmola , D. Budker , N. Bar-Gill

Large exciton-polariton optical nonlinearities present a key mechanism for photonics-based communication, ultimately in the quantum regime. Enhanced nonlinear response from various materials hosting excitons and allowing for their strong…

Mesoscale and Nanoscale Physics · Physics 2024-08-05 Anna M. Grudinina , Nina S. Voronova

We use perturbed relativistic coupled-cluster (PRCC) theory to calculate the electric dipole polarizability of noble gas atoms Ar, Kr, Xe and Rn. We also provide a detailed description of the nonlinear terms in the PRCC theory and consider…

Atomic Physics · Physics 2012-12-19 S. Chattopadhyay , B. K. Mani , D. Angom

We propose a scheme for realizing multi-qubit entangled W-state and non-local $CZ$ and $C_2Z$ gates via a cavity polariton blockade mechanism with a system of atomic qubits coupled to a common cavity mode. The polariton blockade is achieved…

Quantum Physics · Physics 2025-10-20 Vineesha Srivastava , Sven Jandura , Gavin K. Brennen , Guido Pupillo

We report the use of an atomic magnetometer based on nonlinear magneto-optical rotation with frequency modulated light (FM NMOR) to detect nuclear magnetization of xenon gas. The magnetization of a spin-exchange-polarized xenon sample ($1.7…

This paper examines a power law solution under $f(R,T)$ gravity for an isotropic and homogeneous universe by considering its functional form as $f(R,T) = R + \xi RT$, where $\xi$ is a positive constant. In $f(R,T)$ gravity, we have built…

Cosmology and Nongalactic Astrophysics · Physics 2023-10-31 Lokesh Kumar Sharma , Suresh Parekh , Sanjay Maurya , Kuldeep Singh , Saibal Ray , Kalyani C. K. Mehta , Vaibhav Trivedi

We report our successful implementation of the full fledged relativistic equation of motion coupled cluster (EOMCC) method. This method is employed to compute the principal ionization potentials (IPs) of closed-shell rare gas atoms, He-like…

Atomic Physics · Physics 2014-04-24 Himadri Pathak , B. K. Sahoo , B. P. Das , Nayana Vaval , Sourav Pal

Two series of [Ru10/Cox)]12 and [Ru6/Cr3/Cox)]12 x=16-60 easy-plane anisotropy multilayers (all thicknesses in {\AA}), prepared by sputter deposition, are studied by cavity FMR. The acoustic modes are excited by setting the RF field…

Mesoscale and Nanoscale Physics · Physics 2022-01-24 P. Ntetsika , G. Mitrikas , G. Litsardakis , I. Panagiotopoulos

We propose a measurement-based quantum metrology protocol in a composite model, where the probe system (a spin ensemble) is coupled to an ancillary two-level system (qubit) with a general Heisenberg XXZ interaction. With an optimized and…

Quantum Physics · Physics 2026-01-23 Peng Chen , Jun Jing

Quantum amplification is recognized as a key resource for precision measurements. However, most conventional paradigms employ an ensemble of independent particles that usually limit the performance of quantum amplification in gain, spectral…

Quantum Physics · Physics 2023-09-21 Minxiang Xu , Min Jiang , Yuanhong Wang , Haowen Su , Ying Huang , Xinhua Peng

We build a resonant fiber optic gyro based on Kagome hollow-core fiber. A semi-bulk cavity architecture based on a 18-m-long Kagome fiber permits to achieve a cavity finesse of 23 with a resonance linewidth of 700 kHz. An optimized…

Instrumentation and Detectors · Physics 2019-03-27 A. Ravaille , G. Feugnet , B. Debord , F. Gérôme , G. Humbert , F. Benabid , F. Bretenaker

The precision of compact inertial sensing schemes using trapped- and guided-atom interferometers has been limited by uncontrolled phase errors caused by trapping potentials and interactions. Here, we propose an acoustic interferometer that…

Quantum Gases · Physics 2015-01-27 G. Edward Marti , Ryan Olf , Dan M. Stamper-Kurn

We show how the switching-on of an electron transport through a system of two parallel quantum dots embedded in a short quantum wire in a photon cavity can trigger coupled Rabi and collective electron-photon oscillations. We select the…

Mesoscale and Nanoscale Physics · Physics 2015-07-22 Vidar Gudmundsson , Anna Sitek , Pei-yi Lin , Nzar Rauf Abdullah , Chi-Shung Tang , Andrei Manolescu

We experimentally demonstrate a novel interferometric architecture for next-generation gravity missions, featuring a laser ranging interferometer (LRI) that enables monoaxial transmission and reception of laser beams between two optical…

For some cavity-quantum-electrodynamics systems, such as a single electron spin coupled to a passive cavity, it is challenging to reach the strong-coupling regime. In such a weak-coupling regime, the conventional dispersive readout…

Quantum Physics · Physics 2019-06-04 Guo-Qiang Zhang , Yi-Pu Wang , J. Q. You