Results 11 to 20 of about 126 (112)

Generalized Rotating‐Wave Approximation for the Quantum Rabi Model with Optomechanical Interaction

open access: yesAnnalen der Physik, Volume 535, Issue 11, November 2023., 2023
The generalized rotating‐wave approximation (G‐RWA) to calculate the energy spectrum of the quantum Rabi model with optomechanical interaction for arbitrary large couplings is implemented. The system behaves as atom‐cavity polaritons interacting with displaced phonons, leading to spectra in very good agreement with numerical results.
Wallace H. Montaño, Jesús A. Maytorena
wiley   +1 more source

Memoryless Quantum Repeaters Based on Cavity‐QED and Coherent States

open access: yesAdvanced Quantum Technologies, Volume 6, Issue 8, August 2023., 2023
A quantum repeater scheme based on cavity quantum electrodynamics and quantum error correction of channel loss via rotation‐symmetric bosonic codes is proposed to distribute atomic entangled states over long distances without memories and at high clock rates.
Pei‐Zhe Li, Peter van Loock
wiley   +1 more source

Statistical Methods for Quantum State Verification and Fidelity Estimation

open access: yesAdvanced Quantum Technologies, Volume 5, Issue 5, May 2022., 2022
How can one verify that a certain quantum state has been prepared in a quantum device? This question is essential for various tasks in quantum information processing. This article presents a pedagogical review on this topic. Starting from the theory of hypothesis testing, the current protocols for quantum state verification and fidelity estimation are ...
Xiao‐Dong Yu   +2 more
wiley   +1 more source

The Information‐Complete Quantum Theory

open access: yesQuantum Engineering, Volume 2022, Issue 1, 2022., 2022
Quantum mechanics is a cornerstone of our current understanding of nature and extremely successful in describing physics covering a huge range of scales. However, its interpretation remains controversial since the early days of quantum mechanics. What does a quantum state really mean?
Zeng-Bing Chen, ShiJie Wei
wiley   +1 more source

Two-Carrier Scheme: Evading the 3 dB Quantum Penalty of Heterodyne Readout in Gravitational-Wave Detectors [PDF]

open access: yes, 2021
Precision measurements using a traditional heterodyne readout suffer a 3 dB quantum noise penalty compared with a homodyne readout. The extra noise is caused by the quantum fluctuations in the image vacuum.
Zhang, T.   +6 more
core   +1 more source

Observation of a kilogram-scale oscillator near its quantum ground state [PDF]

open access: yes, 2009
We introduce a novel cooling technique capable of approaching the quantum ground state of a kilogram-scale system—an interferometric gravitational wave detector.
Blair, D   +999 more
core   +1 more source

Donor Spins in Silicon for Quantum Technologies

open access: yesAdvanced Quantum Technologies, Volume 3, Issue 11, November 2020., 2020
Donor atoms in silicon are among the most coherent quantum systems in the solid state, and can be integrated with industry‐standard manufacturing methods. This review and perspective article describes applications of single donors in quantum computing, sensing and chaos, and donor ensembles for quantum memories.
Andrea Morello   +3 more
wiley   +1 more source

Searching for Dark Matter with a Superconducting Qubit [PDF]

open access: yes, 2021
Detection mechanisms for low mass bosonic dark matter candidates, such as the axion or hidden photon, leverage potential interactions with electromagnetic fields, whereby the dark matter (of unknown mass) on rare occasion converts into a single photon ...
Naik, Ravi K.   +6 more
core   +3 more sources

Coupling of nanomechanical resonators to controllable quantum systems [PDF]

open access: yes, 2014
The coupling of nanomechanical resonators to controllable quantum systems represents a growing and promising area of research. Recent advances in this field have brought to astonishing results, such as the initialization of a mechanical resonator into ...
Montinaro, Michele
core   +1 more source

Device and method for quantum nondemolition measurements using parametric oscillation [PDF]

open access: yes, 1989
Quantum nondemolition measurements are made by back-action evasion obtained by a combination of a parametric oscillation and a conversion of polarizations.
Kimble, Harry J.   +2 more
core   +1 more source

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