scholarly journals Cooling of a levitated nanoparticle to the motional quantum ground state

Science ◽  
2020 ◽  
Vol 367 (6480) ◽  
pp. 892-895 ◽  
Author(s):  
Uroš Delić ◽  
Manuel Reisenbauer ◽  
Kahan Dare ◽  
David Grass ◽  
Vladan Vuletić ◽  
...  
Keyword(s):  
Ground State ◽  
Quantum Control ◽  
Optical Cavity ◽  
Optical Trap ◽  
Laser Cool ◽  
Complex Objects ◽  
Precise Control ◽  
Sensing Applications ◽  
Superposition States ◽  
Quantum Ground State

Quantum control of complex objects in the regime of large size and mass provides opportunities for sensing applications and tests of fundamental physics. The realization of such extreme quantum states of matter remains a major challenge. We demonstrate a quantum interface that combines optical trapping of solids with cavity-mediated light-matter interaction. Precise control over the frequency and position of the trap laser with respect to the optical cavity allowed us to laser-cool an optically trapped nanoparticle into its quantum ground state of motion from room temperature. The particle comprises 108 atoms, similar to current Bose-Einstein condensates, with the density of a solid object. Our cooling technique, in combination with optical trap manipulation, may enable otherwise unachievable superposition states involving large masses.

scholarly journals Control of quantum electrodynamical processes by shaping electron wavepackets

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Liang Jie Wong ◽  
Nicholas Rivera ◽  
Chitraang Murdia ◽  
Thomas Christensen ◽  
John D. Joannopoulos ◽  
...  
Keyword(s):  
Free Electron ◽  
Spectral Characteristics ◽  
Modern Science ◽  
Optical Excitation ◽  
Field Theories ◽  
Photon Scattering ◽  
Precise Control ◽  
Bremsstrahlung Emission ◽  
Superposition States ◽  
Electron Photon

AbstractFundamental quantum electrodynamical (QED) processes, such as spontaneous emission and electron-photon scattering, encompass phenomena that underlie much of modern science and technology. Conventionally, calculations in QED and other field theories treat incoming particles as single-momentum states, omitting the possibility that coherent superposition states, i.e., shaped wavepackets, can alter fundamental scattering processes. Here, we show that free electron waveshaping can be used to design interferences between two or more pathways in a QED process, enabling precise control over the rate of that process. As an example, we show that free electron waveshaping modifies both spatial and spectral characteristics of bremsstrahlung emission, leading for instance to enhancements in directionality and monochromaticity. The ability to tailor general QED processes opens up additional avenues of control in phenomena ranging from optical excitation (e.g., plasmon and phonon emission) in electron microscopy to free electron lasing in the quantum regime.

Quantum ground state and single-phonon control of a mechanical resonator

Nature ◽  
2010 ◽  
Vol 464 (7289) ◽  
pp. 697-703 ◽  
Author(s):  
A. D. O’Connell ◽  
M. Hofheinz ◽  
M. Ansmann ◽  
Radoslaw C. Bialczak ◽  
M. Lenander ◽  
...  
Keyword(s):  
Ground State ◽  
Mechanical Resonator ◽  
Quantum Ground State

Quantum ground state effect on fluctuation rates in nano-patterned superconducting structures

2013 ◽  
Vol 103 (24) ◽  
pp. 242601 ◽  
Author(s):  
Amin Eftekharian ◽  
Haig Atikian ◽  
Mohsen K. Akhlaghi ◽  
Amir Jafari Salim ◽  
A. Hamed Majedi
Keyword(s):  
Ground State ◽  
State Effect ◽  
Quantum Ground State

scholarly journals Sideband cooling of micromechanical motion to the quantum ground state

Nature ◽  
2011 ◽  
Vol 475 (7356) ◽  
pp. 359-363 ◽  
Author(s):  
J. D. Teufel ◽  
T. Donner ◽  
Dale Li ◽  
J. W. Harlow ◽  
M. S. Allman ◽  
...  
Keyword(s):  
Ground State ◽  
Quantum Ground State ◽  
Sideband Cooling

Spin-singlet quantum ground state in one-dimensional magnet vanadyl diacetate

2019 ◽  
Vol 473 ◽  
pp. 236-240
Author(s):  
E.A. Zvereva ◽  
T.M. Vasilchikova ◽  
M.I. Stratan ◽  
S.A. Ibragimov ◽  
I.S. Glazkova ◽  
...  
Keyword(s):  
Ground State ◽  
One Dimensional ◽  
Spin Singlet ◽  
Quantum Ground State

Early History and Fundamentals of Optomechanics

2020 ◽  
pp. 1-40
Author(s):  
Antoine Heidmann ◽  
Pierre-Francois Cohadon
Keyword(s):  
Quantum Optics ◽  
Laser Cooling ◽  
Ground State ◽  
High Sensitivity ◽  
Early History ◽  
Optical Measurements ◽  
Mechanical Resonators ◽  
History Of ◽  
Control Light ◽  
Quantum Ground State

In its simplest form, optomechanics amounts to two complementary coupling effects: mechanical motion changes the path followed by light, but light (through radiation pressure) can drive the mechanical resonator into motion as well. Optomechanics allows one to control resonator motion by laser cooling down to the quantum ground state, or to control light by using back-action in optical measurements and in quantum optics. Its main applications are optomechanical sensors to detect tiny mechanical motions and weak forces, cold damping and laser cooling, and quantum optics. The objectives of this chapter are to provide a brief account of the history of the field, together with its fundamentals. We will in particular review both classical and quantum aspects of optomechanics, together with its applications to high-sensitivity measurements and to control or cool mechanical resonators down to their ground state, with possible applications for tests of quantum theory or for quantum information.

Cooling Mechanical Resonators to Quantum Ground State in a Double-cavity Optomechanical System

2018 ◽  
Vol 24 (2) ◽  
pp. 170-177
Author(s):  
曹智伊 CAO Zhi-yi ◽  
蔡秋华 CAI Qiu-hua ◽  
於亚飞 YU Ya-fei ◽  
张智明 ZHANG Zhi-ming
Keyword(s):  
Ground State ◽  
Mechanical Resonators ◽  
Optomechanical System ◽  
Quantum Ground State ◽  
Cavity Optomechanical System

scholarly journals Erratum: Solving Quantum Ground-State Problems with Nuclear Magnetic Resonance

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Zhaokai Li ◽  
Man-Hong Yung ◽  
Hongwei Chen ◽  
Dawei Lu ◽  
James D. Whitfield ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ground State ◽  
Quantum Ground State ◽  
Nuclear Magnetic
Sign in / Sign up

Export Citation Format

Share Document