Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Carrier Generation and Recombination01:22

Carrier Generation and Recombination

610
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
610
Sampling Continuous Time Signal01:11

Sampling Continuous Time Signal

273
In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
273
Design Example01:23

Design Example

343
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
343
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

3.4K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
3.4K
Cut-off Frequency of BJT01:17

Cut-off Frequency of BJT

739
Cut-off frequencies in Bipolar Junction Transistors (BJTs) mark the transition between the signal's pass band and stop band, influencing their performance in amplifying or attenuating frequencies. These frequencies are crucial for designing BJTs to meet specific operational requirements in electronic circuits.
Alpha Cut-Off Frequency: Pertinent to the common-base configuration, the alpha cut-off frequency defines the upper-frequency limit at which the current gain, alpha, remains stable. As...
739
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

1.1K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Senescent cells in systemic aging: SASP heterogeneity, immune escape, and endocrine modulation.

Biogerontology·2026
Same author

Long-Distance Free-Space Quantum Key Distribution with Continuous Variables.

Physical review letters·2026
Same author

Polarization-multiplexed co-transmission of continuous-variable QKD and quantum noise stream cipher.

Optics letters·2026
Same author

Rate-Adaptive Information Reconciliation for CV-QKD Systems at Low Signal-to-Noise Ratios.

Entropy (Basel, Switzerland)·2026
Same author

EZH2 PROTACs outperform catalytic inhibitors in prostate cancer by targeting a methylation-independent function of PRC2.

Oncogene·2026
Same author

Desulfurative modification of cysteine residues in peptides and proteins <i>via</i> the installation and photoexcitation of thieno[2,3-<i>c</i>]-pyrroles.

Chemical science·2025

Related Experiment Video

Updated: Jul 15, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.0K

Effective Excess Noise Suppression in Continuous-Variable Quantum Key Distribution through Carrier Frequency

Jing Dong1, Tao Wang1,2, Zhuxuan He1

  • 1State Key Laboratory of Advanced Optical Communication Systems and Networks, Center of Quantum Sensing and Information Processing, Shanghai Jiao Tong University, Shanghai 200240, China.

Entropy (Basel, Switzerland)
|September 28, 2023
PubMed
Summary

A new carrier frequency switching (CFS) scheme suppresses noise in continuous-variable quantum key distribution (CV-QKD) during quantum-classical co-transmissions. This method significantly enhances secret key rates by avoiding classical signal interference.

Keywords:
continuous-variablefrequency switchingnoise suppressionquantum key distribution

More Related Videos

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

14.6K
Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

10.9K

Related Experiment Videos

Last Updated: Jul 15, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.0K
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

14.6K
Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

10.9K

Area of Science:

  • Quantum Information Science
  • Optical Communications Engineering

Background:

  • Continuous-variable quantum key distribution (CV-QKD) offers secure key exchange but faces challenges in quantum-classical co-transmissions.
  • Classical signal crosstalk in shared optical channels distorts quantum signals, degrading CV-QKD performance.

Purpose of the Study:

  • To develop an effective noise-suppression scheme for CV-QKD systems operating alongside classical communication signals.
  • To mitigate the impact of large-power classical noise on weak quantum signals in co-transmission scenarios.

Main Methods:

  • Proposed a carrier frequency switching (CFS) noise-suppression scheme.
  • Implemented a digital filter to remove channel noise.
  • Shifted the quantum signal's frequency to a minimum noise power spectrum window.

Main Results:

  • Reduced excess noise to 1.8% compared to traditional fixed carrier frequency methods.
  • Increased secret key rate by 1.43 to 2.86 times across various distances.
  • Demonstrated effective mitigation of large-power random noise on weak coherent states.

Conclusions:

  • The CFS noise-suppression scheme is highly effective for CV-QKD in quantum-classical co-transmission environments.
  • This technique is crucial for improving the practical viability and performance of CV-QKD in integrated communication systems.
  • Expected to enhance multi-QKD co-transmission scenarios by providing robust noise solutions.