Cavity quantum electrodynamics in a high numerical aperture resonator
Data files
Feb 07, 2025 version files 1.09 MB
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DATA_afm_waist_scan.csv
75.77 KB
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DATA_cavity_spectrum.csv
10.60 KB
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DATA_early_time_dynamics.csv
7.36 KB
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DATA_fidelity_counts.csv
409.45 KB
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DATA_g2_dipole_full.csv
18.27 KB
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DATA_g2_dipole_inset.csv
54.67 KB
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DATA_g2_lattice_full.csv
18.27 KB
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DATA_g2_lattice_inset.csv
54.67 KB
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DATA_histogram_in_dipole_trap.csv
122.26 KB
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DATA_histogram_in_lattice.csv
308.35 KB
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DATA_telegraph_trace_fourth.csv
1.52 KB
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DATA_telegraph_trace_one.csv
1.41 KB
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DATA_telegraph_trace_three.csv
1.51 KB
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DATA_telegraph_trace_two.csv
1.52 KB
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DATA_vrs.csv
1.06 KB
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README.md
4.59 KB
Abstract
From fundamental studies of light-matter interaction to applications in quantum networking and sensing, cavity quantum electrodynamics (QED) provides a toolbox to control interactions between atoms and photons. The coherence of interactions is determined by the single-pass atomic absorption and the number of photon round-trips. Reducing the cavity loss has enabled resonators supporting~1-million roundtrips, but with limited material choices and increased alignment sensitivity. Here we present a high numerical-aperture,lens-based resonator that pushes the single-atom-single-photon absorption probability near its fundamental limit by reducing the mode size at the atom to order lambda. This resonator provides a single-atom cooperativity of 1.6 in a cavity where the light circulates only~10times. We load a single 87Rb atom into this cavity, observe strong coupling, and demonstrate cavity-enhanced detection with fidelity of 99.55(6)% and survival of 99.89(4)% in 130 microseconds. Introducing intra-cavity imaging systems will enable cavity arrays compatible with Rydberg atom arrays computing technologies, expanding the the applicability of the cavity QED toolbox.
https://doi.org/10.5061/dryad.xgxd254s8
Description of the data and file structure
Data was taken on the Small Waist apparatus in the Simon Lab at Stanford university.
Files and variables
File: DATA_afm_waist_scan.csv
Description: 2D heat map of afm cavity waist scan
Variables:
- x, measured in units of microns. A scan of the afm tip to measure the waist in x
- y, measured in units of microns. A scan of the afm tip to measure the waist in y
File: DATA_cavity_spectrum.csv
Variables
- Mirror Displacement (microns): translating the cavity length allows one to scan through resonances
- Transmission (arbitrary units): the amount of light circulating in the cavity varies as we sweep through the resonances
File: DATA_fidelity_counts.csv
Description: histogram counts, 1 ms bin size
Variables
- Counts over time, PGC molasses light impinges on the atoms, the fluorescence level is collected by the cavity, the photon counts are measured on an SCPM
File: DATA_g2_dipole_full.csv
Variables
- Time (us): the time axis for correlations between events on the spcm.
- g2: a measure of the probability of detecting a second photon given that one photon is detected. For thermal states, such a measurement is one. Correlations and anti-correlations can be telling of the underlying physics
File: DATA_telegraph_trace_fourth.csv
Variables
- Time (ms): the duration that PGC light is shining on the atoms
- Rate (kHz): The rate of collected photons on the single photon counter module
File: DATA_g2_dipole_inset.csv
Variables
- Time (us): the time axis for correlations between events on the spcm.
- g2: a measure of the probability of detecting a second photon given that one photon is detected. For thermal states, such a measurement is one. Correlations and anti-correlations can be telling of the underlying physics
File: DATA_vrs.csv
Variables
- Light-Cavity Detuning (MHz): The frequency of light driving the cavity can be tuned in order to reveal the response function of the atom-cavity system
- Transmission (arb): For a hybridized, strongly coupled atom-cavity system, the response showcases two peaks split out by the coupling between the atom and the cavity
File: DATA_telegraph_trace_three.csv
Variables
- Time (ms): the duration that PGC light is shining on the atoms
- Rate (kHz): The rate of collected photons on the single photon counter module
File: DATA_telegraph_trace_one.csv
Variables
- Time (ms): the duration that PGC light is shining on the atoms
- Rate (kHz): the rate of collected photons on the single photon counter module
File: DATA_g2_lattice_full.csv
Variables
- Time (us): the time axis for correlations between events on the spcm.
- g2: a measure of the probability of detecting a second photon given that one photon is detected. For thermal states, such a measurement is one. Correlations and anti-correlations can be telling of the underlying physics
File: DATA_histogram_in_lattice.csv
Description: histogram counts over time (5 ms)
Variables
- counts over time: PGC molasses light impinges on the atoms, the fluorescence level is collected by the cavity, the photon counts are measured on an SCPM
File: DATA_g2_lattice_inset.csv
Variables
- Time (us): the time axis for correlations between events on the spcm.
- g2: a measure of the probability of detecting a second photon given that one photon is detected. For thermal states, such a measurement is one. Correlations and anti-correlations can be telling of the underlying physics
File: DATA_early_time_dynamics.csv
Variables
- Time (ms): the duration that PGC light is shining on the atoms
- Rate (kHz): the rate of collected photons on the single photon counter module
File: DATA_telegraph_trace_two.csv
Variables
- Time (ms): the duration that PGC light is shining on the atoms
- Rate (kHz): the rate of collected photons on the single photon counter module
File: DATA_histogram_in_dipole_trap.csv
Description: histogram counts over time (5 ms)
Variables
- counts over time
Code/software
Python analysis
Access information
Other publicly accessible locations of the data:
- None
Data was derived from the following sources:
- All data was taken in the Simon Lab at Stanford
This data was collected using a single photon counter and processed using Jupyter Notebook (python)