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Related Experiment Video

Updated: May 13, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Fidelity of the quantum δ-kicked accelerator.

R K Shrestha¹, S Wimberger, J Ni

¹Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078-3072, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|March 19, 2013

Summary

We investigated how acceleration affects quantum fidelity in a kicked rotor using Bose-Einstein condensates. Findings reveal fidelity spectrum features sensitive to acceleration, potentially aiding ultracold atomic temperature measurement.

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Gradient Echo Quantum Memory in Warm Atomic Vapor

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Published on: November 11, 2013

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Published on: June 8, 2018

Area of Science:

Quantum physics
Atomic physics
Condensed matter physics

Background:

The kicked rotor model is a fundamental system for studying quantum chaos.
Bose-Einstein condensates provide a controllable platform for simulating quantum phenomena.

Purpose of the Study:

To experimentally and theoretically investigate the sensitivity of quantum fidelity in a kicked rotor system to acceleration.
To explore the fidelity "spectrum" as a function of acceleration.
To identify potential applications in thermometry for ultracold atomic samples.

Main Methods:

Utilized a Bose-Einstein condensate subjected to pulsed laser excitation (standing light wave).
Implemented a single reversal pulse with a half-wavelength shift of the standing wave.
Performed both experimental measurements and theoretical analysis.

Main Results:

Characterized the fidelity spectrum of the kicked rotor system.
Demonstrated a clear dependence of fidelity on applied acceleration.
Observed distinct features in the fidelity spectrum related to acceleration.

Conclusions:

The fidelity of the kicked rotor is sensitive to acceleration.
The observed fidelity spectrum provides insights into quantum dynamics under acceleration.
This research may lead to novel methods for measuring the temperature of ultracold atomic gases.