Results 1 to 10 of about 269,456 (297)

Atom-optically synthetic gauge fields for a noninteracting Bose gas

open access: yesLight: Science & Applications, 2022
A two-leg ladder with tunable gauge fields is achieved by one-dimensional synthetic momentum-state lattice of a noninteracting Bose gas.
Yuqing Li   +9 more
doaj   +1 more source

Optical driving, spin initialization and readout of single SiV− centers in a Fabry-Perot resonator

open access: yesCommunications Physics, 2023
Large-scale quantum communication networks require quantum repeaters due to the signal attenuation in optical fibers. Ideal quantum repeater nodes efficiently link a quantum memory with photons serving as flying qubits.
Gregor Bayer   +10 more
doaj   +1 more source

Continuous entanglement distribution over a transnational 248 km fiber link

open access: yesNature Communications, 2022
Fibre-based entanglement distribution represents a key primitive for quantum applications such as QKD. Here, the authors demonstrate it across 248 km of deployed fiber, observing stable detected pair rates of 9 Hz for 110 h.
Sebastian Philipp Neumann   +4 more
doaj   +1 more source

High-performance cavity-enhanced quantum memory with warm atomic cell

open access: yesNature Communications, 2022
Quantum memories usually suffer from a trade-off between efficiency and excess noise. Here, by exploiting the time-reversal approach for improving modes matching, the authors show a warm-atomic-cell-based cavity-enhanced memory with 67% efficiency and ...
Lixia Ma   +8 more
doaj   +1 more source

Testing universality of Feynman-Tan relation in interacting Bose gases using high-order Bragg spectra

open access: yesLight: Science & Applications, 2023
The Feynman-Tan relation, obtained by combining the Feynman energy relation with the Tan’s two-body contact, can explain the excitation spectra of strongly interacting 39K Bose-Einstein condensate (BEC).
Yunfei Wang   +7 more
doaj   +1 more source

Long-lived and multiplexed atom-photon entanglement interface with feed-forward-controlled readouts

open access: yesCommunications Physics, 2021
The quantum interface to generate entanglement between a flying photonic qubit and a stationary qubit is a key functionality for the quantum internet. The authors demonstrate a multiplexed quantum interface that stores three long-lived spin-wave qubits ...
Sheng-zhi Wang   +6 more
doaj   +1 more source

Quantum Superposition States of Bose-Einstein Condensates [PDF]

open access: yes, 1997
We propose a scheme to create a macroscopic ``Sch\"odinger cat'' state formed by two interacting Bose condensates. In analogy with quantum optics, where the control and engineering of quantum states can be maintained to a large extend, we consider the ...
A. O. Caldeira   +48 more
core   +2 more sources

Noncanonical quantum optics [PDF]

open access: yes, 2000
Modification of the right-hand-side of canonical commutation relations (CCR) naturally occurs if one considers a harmonic oscillator with indefinite frequency. Quantization of electromagnetic field by means of such a non-CCR algebra naturally removes the
Born M   +16 more
core   +2 more sources

A two-channel, spectrally degenerate polarization entangled source on chip

open access: yesnpj Quantum Information, 2017
Quantum Information: the realization of integrated entangled photons sources In the context of quantum technology, integrated photonic devices demonstrated great potential to perform quantum tasks stably with ease.
Linda Sansoni   +6 more
doaj   +1 more source

Autler–Townes splitting in the trap-loss fluorescence spectroscopy due to single-step direct Rydberg excitation of cesium cold atomic ensemble

open access: yesAIP Advances, 2023
We experimentally investigate trap-loss spectra of the cesium 6S1/2(F = 4) → 71P3/2 Rydberg transition by combining the cesium atomic magneto-optical trap with the narrow-linewidth, continuously tunable 318.6 nm ultraviolet laser. Specifically, the atoms
Xin Wang   +8 more
doaj   +1 more source

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