Methods and apparatuses for modulating lights sources

Abstract

Aspects of the present disclosure include methods and systems for modulating light sources including applying, through an acousto-optic modulator (AOM) disposed in series with an electro-optic modulator (EOM), a global optical beam to a plurality of dual-space, single-species (DSSS) trapped ions at a wavelength near a transition center and adjusting a drive tone of at least one of the EOM or the AOM to modulate the global beam to emit at approximately half of a S1/2 hyperfine frequency.

What is claimed is: 
     
         1 . A method of operating a quantum information processing (QIP) system, comprising:
 applying, through an acousto-optic modulator (AOM) disposed in series with an electro-optic modulator (EOM), a global optical beam to a plurality of dual-space, single-species (DSSS) trapped ions at a wavelength near a transition center; and   adjusting a drive tone of at least one of the EOM or the AOM to modulate the global beam to emit at approximately half of a S 1/2  hyperfine frequency.   
     
     
         2 . The method of  claim 1 , wherein adjusting the drive tone comprises adjusting one or more of a frequency, a phase, or an amplitude of the drive tone. 
     
     
         3 . The method of  claim 1 , further comprising:
 driving at least a first channel of the AOM at a first frequency between 50 megahertz (MHz) and 350 MHz; and   driving at least a second channel of the EOM at a second frequency between 4 gigahertz (GHz) and 6 GHz.   
     
     
         4 . The method of  claim 3 , wherein driving the at least second channel of the EOM comprises:
 driving a radio frequency (RF) tone; and   driving a microwave tone.   
     
     
         5 . The method of  claim 4 , wherein driving the microwave tone comprises driving at a Valon frequency (f Valon ). 
     
     
         6 . The method of  claim 4 , wherein driving the RF tone comprises driving at a coherent frequency (f coh ). 
     
     
         7 . The method of  claim 1 , wherein applying the global beam comprises applying the global beam having a carrier frequency that is an offset frequency (f Offset ) away from the transition center. 
     
     
         8 . A quantum information processing (QIP) system, comprising:
 an electro-optic modulator (EOM);   an acousto-optic modulator (AOM) disposed in series with the EOM; and   a light source configured to apply, through the AOM and the EOM, a global optical beam to a plurality of dual-space, single-species (DSSS) trapped ions at a wavelength near a transition center; and   a driver configured to adjust a drive tone of at least one of the EOM or the AOM to modulate the global beam to emit at approximately half of a S 1/2  hyperfine frequency.   
     
     
         9 . The QIP system of  claim 8 , wherein the driver is further configured to adjust one or more of a frequency, a phase, or an amplitude of the drive tone. 
     
     
         10 . The QIP system of  claim 8 , wherein the driver is further configured to:
 drive at least a first channel of the AOM at a first frequency between 50 megahertz (MHz) and 350 MHz; and   drive at least a second channel of the EOM at a second frequency between 4 gigahertz (GHz) and 6 GHz.   
     
     
         11 . The QIP system of  claim 10 , wherein the driver is further configured to:
 drive a radio frequency (RF) tone; and   drive a microwave tone.   
     
     
         12 . The QIP system of  claim 11 , wherein the driver is further configured to drive the microwave tone at a Valon frequency (f Valon ). 
     
     
         13 . The QIP system of  claim 11 , wherein the driver is further configured to drive the RF tone at a coherent frequency (f coh ). 
     
     
         14 . The QIP system of  claim 8 , wherein the first light source is further configured to apply the global beam having a carrier frequency that is an offset frequency (f Offset ) away from the transition center. 
     
     
         15 . A non-transitory computer readable medium having instructions stored therein that, when executed by one or more processors of a quantum information processing (QIP) system, cause the one or more processors to:
 cause a light source to apply, through an acousto-optic modulator (AOM) disposed in series with an electro-optic modulator (EOM), a global optical beam to a plurality of dual-space, single-species (DSSS) trapped ions at a wavelength near a transition center; and   cause a driver to adjust a drive tone of at least one of the EOM or the AOM to modulate the at least one Raman beam to emit at approximately half of a S 1/2  hyperfine frequency.   
     
     
         16 . The non-transitory computer readable medium of  claim 15 , wherein the instructions for causing the driver to adjust the drive tone comprises instructions for causing the driver to adjust one or more of a frequency, a phase, or an amplitude of the drive tone. 
     
     
         17 . The non-transitory computer readable medium of  claim 15 , further comprises instructions to cause the driver to:
 drive at least a first channel of the AOM at a first frequency between 50 megahertz (MHz) and 350 MHz; and   drive at least a second channel of the EOM at a second frequency between 4 gigahertz (GHz) and 6 GHz.   
     
     
         18 . The non-transitory computer readable medium of  claim 17 , wherein the instructions for driving the at least the second channel of the EOM comprises instructions for:
 driving a radio frequency (RF) tone; and   driving a microwave tone.   
     
     
         19 . The non-transitory computer readable medium of  claim 18 , wherein the instructions for driving the microwave tone comprises instructions for driving at a Valon frequency (f Valon ). 
     
     
         20 . The non-transitory computer readable medium of  claim 17 , wherein the instructions for driving the RF tone comprises instructions for driving at a coherent frequency (f coh ). 
     
     
         21 . The non-transitory computer readable medium of  claim 15 , wherein the instructions for applying the global beam comprises instructions for applying the global beam having a carrier frequency that is an offset frequency (f Offset ) away from the transition center.