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Optical clocks at sea.

Jonathan D Roslund1, Arman Cingöz2, William D Lunden2

  • 1Vector Atomic, Inc., Pleasanton, CA, USA. jon@vectoratomic.com.

Nature
|April 24, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed compact optical clocks for mobile platforms. These advanced clocks offer high precision and environmental insensitivity, crucial for navigation and future timekeeping networks.

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Area of Science:

  • Physics
  • Metrology
  • Quantum Technology

Background:

  • Laboratory optical clocks achieve high accuracy (below 10⁻¹⁸ fractional inaccuracy).
  • Existing transportable optical clocks have limitations in size, environmental sensitivity, and cost, restricting their utility.
  • Accurate timekeeping is critical for navigation, geophysical monitoring, and quantum networks.

Purpose of the Study:

  • To develop compact, environmentally robust optical clocks suitable for operation on mobile platforms.
  • To demonstrate the feasibility of using advanced optical clocks in challenging maritime environments.

Main Methods:

  • Development of a 35-liter optical clock integrating a molecular iodine spectrometer, fiber frequency comb, and control electronics.
  • Continuous operation and testing of three such clocks aboard a naval ship for 20 days.

Main Results:

  • The developed optical clocks demonstrated insensitivity to environmental conditions and operated continuously at sea.
  • Timing errors accumulated were below 300 picoseconds per day.
  • The clocks achieved performance comparable to active hydrogen masers but in one-tenth the volume.

Conclusions:

  • This work presents a significant advancement in optical clock technology, enabling their deployment on mobile platforms.
  • The successful maritime demonstration overcomes historical challenges of operating high-performance clocks at sea.
  • This paves the way for future optical timekeeping networks and enhanced navigation systems.