High-precision GHZ clock generation using spin states in diamond
First Claim
1. A method for obtaining a frequency standard using the crystal field splitting frequency of at least one nitrogen vacancy center in at least one diamond structure, comprising:
- applying a microwave field to the at least one diamond structure, the microwave field having a frequency initially equal to an initial frequency;
optically exciting the at least one diamond structure to create photoluminescence having a photoluminescent characteristic based at least on the frequency of the microwave field;
detecting at least a first measurement of the photoluminescent characteristic at the initial frequency;
determining, based on the first measurement, a phase shift for the initial frequency from the constant crystal field splitting frequency of the at least one diamond structure;
varying the frequency of the microwave field until a phase shift for the frequency of the microwave field from the constant crystal field splitting frequency is below a predetermined threshold; and
using the frequency of the microwave field for which the phase shift is below the predetermined threshold as a frequency standard.
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Abstract
Techniques for obtaining a frequency standard using the crystal field splitting frequency of nitrogen vacancy center in diamond are disclosed. In certain exemplary embodiments, a microwave field is applied to the diamond and optically exciting the diamond under green light. The photoluminescent response of the diamond is measured by a photodetector. The intensity of the photoluminescent response can be used to determine the phase shift between the microwave and the crystal field splitting frequency. The microwave field frequency can be adjusted until the phase shift is below a predetermined threshold, and the microwave frequency can then be output for use as a standard.
58 Citations
23 Claims
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1. A method for obtaining a frequency standard using the crystal field splitting frequency of at least one nitrogen vacancy center in at least one diamond structure, comprising:
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applying a microwave field to the at least one diamond structure, the microwave field having a frequency initially equal to an initial frequency; optically exciting the at least one diamond structure to create photoluminescence having a photoluminescent characteristic based at least on the frequency of the microwave field; detecting at least a first measurement of the photoluminescent characteristic at the initial frequency; determining, based on the first measurement, a phase shift for the initial frequency from the constant crystal field splitting frequency of the at least one diamond structure; varying the frequency of the microwave field until a phase shift for the frequency of the microwave field from the constant crystal field splitting frequency is below a predetermined threshold; and using the frequency of the microwave field for which the phase shift is below the predetermined threshold as a frequency standard. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for obtaining a frequency standard using the crystal field splitting frequency of at least one nitrogen vacancy center in at least one diamond structure, comprising:
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a dielectric cavity adapted to at least partially encompass the at least one diamond structure; a light source, operatively configured to excite the at least one nitrogen vacancy, thereby allowing the at least one nitrogen vacancy center to produce a photoluminescent response; a photodetector disposed proximal to the dielectric cavity and opposite the light source for detecting photoluminescence; a stripline, disposed in the plane of and at least partially encompassing the at least one diamond structure, for applying microwave emissions having a frequency to the at least one diamond structure; a processor, coupled to the photodetector and the stripline, to calculate the phase shift of the frequency of the microwave emissions from the crystal field splitting frequency of the at least one nitrogen vacancy center in the at least one diamond structure; and a controller, coupled to the processor and the stripline, to adjust the frequency of the microwave emissions from the stripline based on the phase shift calculated by the processor until the phase shift is below a predetermined threshold, wherein the frequency for which the phase shift is below the predetermined threshold is a frequency standard. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification