scholarly journals Optical coherence transfer mediated by free electrons

2021 ◽  
Vol 7 (18) ◽  
pp. eabf6380
Author(s):  
Ofer Kfir ◽  
Valerio Di Giulio ◽  
F. Javier García de Abajo ◽  
Claus Ropers
Keyword(s):  
Laser Field ◽  
Quantum Coherence ◽  
Electron State ◽  
Laser Frequency ◽  
Quantum Systems ◽  
Optical Coherence ◽  
Coherence Transfer ◽  
Free Electrons ◽  
Quantum Optical ◽  
Spectrally Resolved

We theoretically investigate the quantum-coherence properties of the cathodoluminescence (CL) emission produced by a temporally modulated electron beam. Specifically, we consider the quantum-optical correlations of CL produced by electrons that are previously shaped by a laser field. Our main prediction is the presence of phase correlations between the emitted CL field and the electron-modulating laser, even though the emission intensity and spectral profile are independent of the electron state. In addition, the coherence of the CL field extends to harmonics of the laser frequency. Since electron beams can be focused to below 1 Å, their ability to transfer optical coherence could enable the ultra-precise excitation, manipulation, and spectrally resolved probing of nanoscale quantum systems.

scholarly journals Optical Coherence Transfer Mediated by Free Electrons

2021 ◽  
Author(s):  
Ofer Kfir ◽  
Valerio Di Giulio ◽  
F. Javier García de Abajo ◽  
Claus Ropers
Keyword(s):  
Optical Coherence ◽  
Coherence Transfer ◽  
Free Electrons

Multiformality of 1st, 2nd and 3rd-order Subschemes of Four-Level Optical Quantum Coherence Systems

2013 ◽  
Vol 760-762 ◽  
pp. 290-293
Author(s):  
Xiao Dong Liu ◽  
Lei Dong ◽  
Dong Dong Meng ◽  
Sen Wang
Keyword(s):  
Boolean Algebra ◽  
Level Scheme ◽  
Quantum Coherence ◽  
Weak Field ◽  
Quantum Systems ◽  
Coherence Effects ◽  
Quantum Coherence Effects ◽  
Quantum Optical

Many quantum optical and optoelectronic achievements have been obtained by using quantum coherence effects occurred in four-level quantum systems. Here we report a systemic study on the 1st, 2ndand 3rdorder subschemes of the four-level scheme with the aid of Boolean algebra, and find 7 1storder subschemes and 53 2ndorder subschemes in total. Further it is found that 472 3rd-order subschemes may appear in the realistic optical quantum coherence experiments when the applied lasers are distinguished only by the strong and weak field intensities.

scholarly journals Spectrally resolved Hong–Ou–Mandel interferometry for quantum-optical coherence tomography

2020 ◽  
Vol 8 (6) ◽  
pp. 1023 ◽  
Author(s):  
Pablo Yepiz-Graciano ◽  
Alí Michel Angulo Martínez ◽  
Dorilian Lopez-Mago ◽  
Hector Cruz-Ramirez ◽  
Alfred B. U’Ren
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Quantum Optical ◽  
Spectrally Resolved

scholarly journals Spectrally-resolved Hong-Ou-Mandel interferometry for Quantum-Optical Coherence Tomography

2021 ◽  
Author(s):  
Pablo Yepiz-Graciano ◽  
Ali Angulo Martinez ◽  
Hector Cruz Ramirez ◽  
Alfred B. U'Ren ◽  
Dorilian Lopez-Mago
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Quantum Optical ◽  
Spectrally Resolved

scholarly journals Quantum-Optical Spectrometry in Relativistic Laser–Plasma Interactions Using the High-Harmonic Generation Process: A Proposal

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 192
Author(s):  
Theocharis Lamprou ◽  
Rodrigo Lopez-Martens ◽  
Stefan Haessler ◽  
Ioannis Liontos ◽  
Subhendu Kahaly ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Quantum Electrodynamics ◽  
Laser Field ◽  
High Harmonic ◽  
Intense Laser ◽  
Strong Laser Field ◽  
Laser Plasma Interactions ◽  
Strong Laser ◽  
Optical Spectrometry ◽  
Quantum Optical

Quantum-optical spectrometry is a recently developed shot-to-shot photon correlation-based method, namely using a quantum spectrometer (QS), that has been used to reveal the quantum optical nature of intense laser–matter interactions and connect the research domains of quantum optics (QO) and strong laser-field physics (SLFP). The method provides the probability of absorbing photons from a driving laser field towards the generation of a strong laser–field interaction product, such as high-order harmonics. In this case, the harmonic spectrum is reflected in the photon number distribution of the infrared (IR) driving field after its interaction with the high harmonic generation medium. The method was implemented in non-relativistic interactions using high harmonics produced by the interaction of strong laser pulses with atoms and semiconductors. Very recently, it was used for the generation of non-classical light states in intense laser–atom interaction, building the basis for studies of quantum electrodynamics in strong laser-field physics and the development of a new class of non-classical light sources for applications in quantum technology. Here, after a brief introduction of the QS method, we will discuss how the QS can be applied in relativistic laser–plasma interactions and become the driving factor for initiating investigations on relativistic quantum electrodynamics.

scholarly journals Topological protection of biphoton states

Science ◽  
2018 ◽  
Vol 362 (6414) ◽  
pp. 568-571 ◽  
Author(s):  
Andrea Blanco-Redondo ◽  
Bryn Bell ◽  
Dikla Oren ◽  
Benjamin J. Eggleton ◽  
Mordechai Segev
Keyword(s):  
Quantum Information ◽  
Thermal Environment ◽  
Propagation Constant ◽  
Quantum Systems ◽  
Quantum Gates ◽  
Scattering Loss ◽  
Spatial Features ◽  
Quantum Optical ◽  
Nontrivial Topology ◽  
Large Quantum

The robust generation and propagation of multiphoton quantum states are crucial for applications in quantum information, computing, and communications. Although photons are intrinsically well isolated from the thermal environment, scaling to large quantum optical devices is still limited by scattering loss and other errors arising from random fabrication imperfections. The recent discoveries regarding topological phases have introduced avenues to construct quantum systems that are protected against scattering and imperfections. We experimentally demonstrate topological protection of biphoton states, the building block for quantum information systems. We provide clear evidence of the robustness of the spatial features and the propagation constant of biphoton states generated within a nanophotonics lattice with nontrivial topology and propose a concrete path to build robust entangled states for quantum gates.

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