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Related Experiment Video

Updated: Apr 5, 2026

Monitoring Cell-autonomous Circadian Clock Rhythms of Gene Expression Using Luciferase Bioluminescence Reporters
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A self-interfering clock as a "which path" witness.

Yair Margalit1, Zhifan Zhou1, Shimon Machluf1

  • 1Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.

Science (New York, N.Y.)
|August 8, 2015
PubMed
Summary
This summary is machine-generated.

We developed a self-interfering quantum clock to explore how gravity affects time. This tool reveals that differences in gravitational time affect quantum interference, offering new insights into relativity and quantum mechanics.

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Area of Science:

  • Quantum physics
  • General relativity
  • Metrology

Background:

  • Einstein's general relativity posits time is relative to gravity.
  • Standard quantum theory assumes a global, uniform time.
  • Reconciling these theories is crucial for understanding fundamental physics.

Purpose of the Study:

  • To demonstrate a novel quantum clock for probing the intersection of general relativity and quantum theory.
  • To investigate the impact of simulated gravitational time dilation on quantum interference patterns.
  • To explore the nature of time in quantum systems.

Main Methods:

  • Utilizing a self-interfering clock composed of two atomic spin states.
  • Preparing the clock in a spatial superposition of quantum wave packets.
  • Simulating gravitational time lag by inducing differential ticking rates in wave packets.

Main Results:

  • Differential ticking rates (simulated gravitational time lag) led to "which path" information.
  • This information degraded the visibility of the quantum interference pattern.
  • Unlike standard interferometry, time differences in this quantum clock yield path information.

Conclusions:

  • The self-interfering quantum clock serves as a tool to study time in the context of general relativity and quantum mechanics.
  • The experiment highlights how gravitational time effects can influence quantum phenomena like interference and decoherence.
  • Findings may impact understanding of quantum gravity, decoherence, and the quantum-to-classical transition.