Photon-number dependent cavity vacuum induced transparency and single photon separation

2018 ◽  
Vol 382 (44) ◽  
pp. 3156-3164
Author(s):  
Shuangli Fan ◽  
Hui Sun ◽  
Hongjun Zhang ◽  
Hong Guo
Keyword(s):  
Single Photon ◽  
Photon Number ◽  
Induced Transparency

scholarly journals Single-Photon-Resolved Cross-Kerr Interaction for Autonomous Stabilization of Photon-Number States

2015 ◽  
Vol 115 (18) ◽  
Author(s):  
E. T. Holland ◽  
B. Vlastakis ◽  
R. W. Heeres ◽  
M. J. Reagor ◽  
U. Vool ◽  
...  
Keyword(s):  
Single Photon ◽  
Photon Number

scholarly journals Harnessing temporal modes for multi-photon quantum information processing based on integrated optics

2017 ◽  
Vol 375 (2099) ◽  
pp. 20160244 ◽  
Author(s):  
G. Harder ◽  
V. Ansari ◽  
T. J. Bartley ◽  
B. Brecht ◽  
C. Silberhorn
Keyword(s):  
Integrated Optics ◽  
Frequency Conversion ◽  
Quantum Information Processing ◽  
Single Photon ◽  
Photon Number ◽  
Integrated Optics Devices ◽  
Sum Frequency ◽  
Temporal Modes ◽  
Quantum Technology ◽  
Photon States

In the last few decades, there has been much progress on low loss waveguides, very efficient photon-number detectors and nonlinear processes. Engineered sum-frequency conversion is now at a stage where it allows operation on arbitrary temporal broadband modes, thus making the spectral degree of freedom accessible for information coding. Hereby the information is often encoded into the temporal modes of a single photon. Here, we analyse the prospect of using multi-photon states or squeezed states in different temporal modes based on integrated optics devices. We describe an analogy between mode-selective sum-frequency conversion and a network of spatial beam splitters. Furthermore, we analyse the limits on the achievable squeezing in waveguides with current technology and the loss limits in the conversion process. This article is part of the themed issue ‘Quantum technology for the 21st century’.

scholarly journals A High-Speed Fully Digital Phase-Synchronizer Implemented in a Field Programmable Gate Array Device

2017 ◽  
Vol 24 (3) ◽  
pp. 537-550 ◽  
Author(s):  
Robert Frankowski ◽  
Dariusz Chaberski ◽  
Marcin Kowalski ◽  
Marek Zieliński
Keyword(s):  
Integrated Circuit ◽  
High Speed ◽  
Quantum Physics ◽  
Single Photon ◽  
Photon Number ◽  
Simultaneous Recording ◽  
Wide Frequency Range ◽  
Coincidence Detection ◽  
Clock Period ◽  
Digital Phase

AbstractMost systems used in quantum physics experiments require the efficient and simultaneous recording different multi-photon coincidence detection events. In such experiments, the single-photon gated counting systems can be applicable. The main sources of errors in these systems are both instability of the clock source and their imperfect synchronization with the excitation source. Below, we propose a solution for improvement of the metrological parameters of such measuring systems. Thus, we designed a novel integrated circuit dedicated to registration of signals from a photon number resolving detectors including a phase synchronizer module. This paper presents the architecture of a high-resolution (~60 ps) digital phase synchronizer module cooperating with a multi-channel coincidence counter. The main characteristic feature of the presented system is its ability to fast synchronization (requiring only one clock period) with the measuring process. Therefore, it is designed to work with various excitation sources of a very wide frequency range. Implementation of the phase synchronizer module in an FPGA device enabled to reduce the synchronization error value from 2.857 ns to 214.8 ps.

CONTROLLABLE FOUR-WAVE MIXING IN A MICROWAVE-DRIVEN SIX-LEVEL ATOMIC SYSTEM

2009 ◽  
Vol 23 (17) ◽  
pp. 2123-2131 ◽  
Author(s):  
AIXI CHEN ◽  
ZHIPING WANG ◽  
LI DENG
Keyword(s):  
Information Science ◽  
High Efficiency ◽  
Single Photon ◽  
Four Wave Mixing ◽  
Nonlinear Spectroscopy ◽  
Destructive Interference ◽  
Wave Mixing ◽  
Low Light ◽  
Atomic Medium ◽  
Induced Transparency

A scheme of high-efficiency four-wave mixing (FWM) is discussed in the case of an atomic medium in a six-level configuration via two electromagnetically induced transparencies (EIT) and a multiphoton destructive interference induced transparency. By adjusting the intensity of the microwave field, an increase of several orders in the conversion efficiency of FWM can be obtained. Our scheme may provide new possibilities for technological applications such as nonlinear spectroscopy at very low light intensity, quantum single-photon nonlinear optics and quantum information science.

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