Atom-based closed-loop control for electromagnetic radiation measurement, communications, and information processing
A method for atom-based closed-loop control includes exciting atoms of a gas into one or more Rydberg states, applying one or more signal processing functions to the one or more Rydberg states, and regulating a characteristic of the applied one or more signal processing functions based on, at least in part, a response of the one or more Rydberg states to the one or more signal processing functions. A system for internal quantum-state-space interferometry includes an atomic receiver, an interferometric pathway, and a detector. The interferometer includes an atomic vapor with first atomic states and second atomic states. The interferometric pathway from RF phases between the first and second atomic states is closed by a quantum-state-space. The detector is configured to detect a readout of an interferometric signal. Embodiments include atom-based automatic level control, baseband processors, phase-locked loops, voltage transducers, raster RF imagers and waveform analyzers.
1. An atom-based closed-loop control system comprising:
a compartment enclosing a gas of excited atoms comprising one or more Rydberg states, wherein the compartment is configured to be exposed to external electromagnetic radiation;
a device configured to apply an input signal to the one or more Rydberg states;
a detector configured to detect a response of the one or more Rydberg states due to an interaction of the one or more Rydberg states with the external electromagnetic radiation; and
a controller configured to:
adjust a characteristic of the applied input signal based on, at least in part, the detected response of the one or more Rydberg states to the external electromagnetic radiation, and
provide semi-autonomous or autonomous closed-loop adjustment of the characteristic of the applied input signal based on the detected response.
2. The system of claim 1 , wherein:
the controller is further configured to adjust the characteristic of the applied input signal based on a characteristic of the external electromagnetic radiation, and
the characteristic of the external electromagnetic radiation comprises a frequency, an amplitude, a phase, a polarization, a power, a direction of arrival, an angle of arrival, and/or a combination thereof.
3. The system of claim 1 , wherein the controller is further configured to adjust a control signal and/or a processing signal based on the detected response of the one or more Rydberg states to the external electromagnetic radiation.
4. The system of claim 1 , wherein the controller is further configured to adjust the characteristic based on differential feedback between the detected response and a set point.
5. The system of claim 1 , wherein the controller is further configured to automatically adjust the characteristic based on the detected response.
6. The system of claim 1 , wherein the device is further configured to apply a fiduciary RF electromagnetic wave or a reference local oscillator wave.
7. The system of claim 1 , wherein the applied input signal comprises a plurality of fields for multi-field conditioning of the one or more Rydberg states.
8. The system of claim 1 , wherein the characteristic and the detected response are electronically synchronized, frequency-locked, and/or phase-locked.
9. The system of claim 1 , wherein the controller is further configured to determine an electromagnetic spectrum.
10. The system of claim 1 , further comprising a multiplexer configured to parallelize or multiplex one or more combinations of optical and RF electromagnetic fields, interferometric pathways, and/or interferometric signals of the one or more Rydberg states.
11. The system of claim 10 , wherein the multiplexer is configured to apply spatial, temporal, and/or frequency multiplexing.
12. The system of claim 10 , wherein the multiplexer is configured to provide increased detected RF bandwidth.
13. The system of claim 1 , wherein:
the input signal comprises a plurality of laser beams, and
the detected response is based on a multi-dimensional Doppler-match of parameters of the plurality of laser beams.
14. The system of claim 13 , wherein the multi-dimensional Doppler-match of parameters of the plurality of laser beams comprises at least two laser beams arranged with angles to suppress Doppler shifts in one, two, and/or three dimensions.
15. The system of claim 14 , wherein the plurality of laser beams comprises: three laser beams that are non-collinear to achieve a Doppler-match in two degrees of freedom, or four laser beams that are non-collinear to achieve a Doppler-match in three degrees of freedom.
16. A method for atom-based closed-loop control, the method comprising:
exciting atoms of a gas into one or more Rydberg states;
applying an input signal to the one or more Rydberg states;
detecting a response of the one or more Rydberg states due to an interaction of the one or more Rydberg states with external electromagnetic radiation;
adjusting a characteristic of the applied input signal based on, at least in part, the detected response of the one or more Rydberg states to the external electromagnetic radiation; and
providing semi-autonomous or autonomous closed-loop adjustment of the characteristic of the applied input signal based on the detected response.
17. The method of claim 16 , further comprising automatically adjusting the characteristic based on the detected response.
18. The method of claim 16 , further comprising analyzing modulated RF signals comprising communication protocols, Doppler shifts, and/or frequency chirps.
19. The method of claim 16 , further comprising multiplexing one or more combinations of optical and RF electromagnetic fields, interferometric pathways, and/or interferometric signals of the one or more Rydberg states.
20. A method for atom-based closed-loop control, the method comprising:
exciting atoms of a gas into one or more Rydberg states;
applying an input signal to the one or more Rydberg states;
detecting a response of the one or more Rydberg states due to an interaction of the one or more Rydberg states with electromagnetic radiation; and
adjusting a characteristic of the applied input signal based on, at least in part, the detected response of the one or more Rydberg states to the electromagnetic radiation,
wherein detecting comprises multi-dimensional Doppler-matching of parameters of a plurality of laser beams of the input signal.
21. The system of claim 1 , wherein the characteristic of the applied input signal comprises a frequency, an amplitude, a phase, a polarization, a power, a direction of arrival, an angle of arrival, and/or a combination thereof.
22. The system of claim 1 , wherein the characteristic of the applied input signal comprises a laser frequency, an amplitude, a phase, and/or a polarization configured to excite or interact with the gas of excited atoms.
23. The system of claim 1 , wherein:
the applied input signal comprises an electromagnetic field, an electric field, and/or a magnetic field, and
the characteristic of the applied input signal comprises a parameter of the electromagnetic field, the electric field, and/or the magnetic field.
24. The system of claim 1 , wherein:
the applied input signal comprises a laser beam, and
the characteristic of the applied input signal comprises a parameter of the laser beam.