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Vapor Pressure02:34

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When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...

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Few-cycle vacuum squeezing in nanophotonics.

Rajveer Nehra1,2, Ryoto Sekine1, Luis Ledezma1,3

  • 1Department of Electrical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.

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Researchers developed a lithium niobate nanophotonic chip to generate and measure squeezed vacuum states of light. This breakthrough enables scalable ultrafast quantum nanophotonics with 4.9 dB squeezing.

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Area of Science:

  • Quantum Optics
  • Nanophotonics
  • Quantum Information Science

Background:

  • Squeezed vacuum states are fundamental quantum states of light.
  • Generating and manipulating these states in nanophotonic systems is challenging for quantum information applications.

Purpose of the Study:

  • To develop a nanophotonic platform for generating and measuring squeezed vacuum states on-chip.
  • To demonstrate the feasibility of scalable ultrafast quantum nanophotonics.

Main Methods:

  • Utilized a lithium niobate-based nanophotonic platform.
  • Demonstrated on-chip generation and all-optical measurement of squeezed states.
  • Characterized the bandwidth and squeezing level of the generated states.

Main Results:

  • Generated squeezed states with over 25 terahertz of bandwidth.
  • Achieved 4.9 decibels of squeezing, exceeding requirements for quantum information systems.
  • Successfully demonstrated on-chip generation and measurement of squeezed states.

Conclusions:

  • The developed lithium niobate platform offers a practical approach for scalable ultrafast quantum nanophotonics.
  • The achieved squeezing performance meets critical demands for advanced quantum information systems.
  • This work paves the way for integrated quantum optical technologies.