Open access data for paper "Photon Bunching in a Rotating Reference Frame", Restuccia et. al., Phys. Rev. Lett. (2019).
Contents:
"Classical_Data" (Folder containing the raw data and analysis programs for the classical experiment).
"Quantum_Data" (Folder containing the raw data and analysis programs for the quantum experiment).
Classical Experiment:
"Classical_Data" Contents:
12 sub-folders, 1 for each rotation speed of the experiment platform, for rotation speeds from 0.201 to 2.412 radians/sec.
"Read Classical Data.vi" (LabView program for reading and processing the raw data files).
"Classical_Data_Analysis.xlsx" (Microsoft Excel spreadsheed file for summarising the results and plotting graphs).
Raw data file naming convention:
Each sub-folder contains 50-70 files for both the forward and backward rotations of the experiment platform.
File number_Date_("back" = Reverse rotation)_Time.txt
e.g. "001_12_05_2018_12_28_50.txt" or "001_12_05_2018_back__12_29_35.txt"
File format: Tab delimited text files arranged as follows:
1st Row: 10 consecutive measurement lables using acqusition time (seconds) ranging from 0-9.
2nd Row: 10 consecutive phase measurements in degrees.
3rd - 12th Row: Acquisition times for the 10 phase measurements.
e.g.
0.000 1.000 2.000 3.000 4.000 5.000 6.000 7.000 8.000 9.000
-28.325 -31.299 -36.656 -42.954 -58.503 -52.170 -56.720 -64.621 -60.102 -70.105
12:29:00
12:28:59
12:28:58
12:28:57
12:28:56
12:28:55
12:28:54
12:28:53
12:28:51
12:28:50
"Read Classical Data.vi". LabView program that reads one of the 12 sub-folders, calculates the mean of the 10 phase measurements and the mean timestamp for each file in the folder. The mean of the phase measurements is calculated by converting to polar coordinates so as to average the unwrapped phase values before converting back to degrees. Measurements are sorted according to the two rotation directions of the experiment platform. The difference is calculated between the measurements for the clockwise and anticlockwise rotations. The effects of drift are minimised by taking the difference between the average midpoint of two consecutive clockwise datapoints and the anticlockwise datapoint. Program checks and corrects data that flips around 0 and 360 degrees. Program only considers datapoints that fall within a predefined stability range. The resulting timestamps and mean datapoints of the stable data are inserted into the data analysis spreadsheet.
"Classical_Data_Analysis.xlsx". Microsoft Excel spreadsheet file that calculates the mean phase shift and the standard deviation of all the results for each rotation speed of the experiment platform. All data is the difference between clockwise and anticlockwise rotation, so represents twice the Sagnac effect. A graph of Phase Shift (deg.) is plotted against Rotation Speed (Rad./s), including error bars based on the standard deviation of the data.
Quantum Experiment:
"Quantum_Data" Contents:
"1stDay" (Folder containing sub-folders for each rotation speed of the experiment platform, each labled by rotation speed in radians/sec.).
"2ndDay" (Folder containing sub-folders for each rotation speed of the experiment platform, each labled by rotation speed in radians/sec.).
"Fit HOM Dip.vi" (LabView program for reading and fitting to the HOM Dip_Data).
"HOM Dip_Data (Fig 3b).txt" (Tab delimited text file containing the scanned HOM dip data used to create Fig 3b).
"Read Quantum Data.vi" (LabView program for reading and processing the raw data files).
"Quantum_Data_Analysis.xlsx" (Microsoft Excel file for summarising the results and plotting graphs).
Data is spread over two experiment days, located in folders "1stDay" and "2ndDay" respectively. For each day (folder) the files are further arranged in separate sub-folders, one for each rotation speed of the experiment platform, from 0.201 to 2.412 radians/sec. Some sub-folders contain multiple measurement runs which are further arranged in sub-sub-folders named "1", "2", "3" etc.
Raw data file naming convention:
Each sub-folder contains the measurement files for both the forward and backward rotations of the experiment platform.
File number_Date_("back" = Reverse rotation)_Time.txt
e.g. "001_16_05_2018_17_18_10.txt" or "001_16_05_2018_back__17_19_19.txt"
File format: Tab delimited text files arranged as follows:
1st Row: 6 or 10 consecutive measurements labled using acqusition time (seconds) derived from HORIBA coincidence machine.
2nd Row: 6 or 10 consecutive coincidence measurements.
3rd Row: Corresponding quantum contrast for each coincidence measurement.
4th Row: Single photon count for detector A.
5th Row: Single photon count for detector B.
6th - 15th Row: Acquisition timestamps for the 10 phase measurements (includes measurement dead time).
e.g.
1.037 2.032 3.025 4.020 5.013 6.011 7.012 8.006 9.002 9.998
224.619 192.061 189.239 209.120 208.365 191.437 200.773 206.210 217.944 214.894
60.698 51.733 51.323 55.942 55.746 50.953 54.418 55.844 58.642 58.185
46051.000 47516.000 44678.000 46875.000 44220.000 48981.000 49072.000 49255.000 51086.000 49347.000
41382.000 41748.000 40833.000 47607.000 42206.000 39734.000 42206.000 39276.000 44495.000 42664.000
17:18:33
17:18:31
17:18:28
17:18:26
17:18:24
17:18:22
17:18:20
17:18:18
17:18:15
17:18:10
"Read Quantum Data.vi". LabView program that reads the raw files from a sub-folder, calculates the mean of the individual coincidence measurements and the mean timestamp for each file. Measurements are sorted according to the two rotation directions of the experiment platform. The difference is calculated between the measurements for the clockwise and anticlockwise rotations. The effects of drift are minimised by taking the difference between the average midpoint of two consecutive clockwise datapoints and the anticlockwise datapoint. The coincidences are transformed into position using a HOM dip model (using parameters estimated using "Fit HOM Dip.vi" and the "HOM Dip Data (1 or 2).txt" files located in "1stDay" and "2ndDay" folders respectively). The resulting mean difference and standard deviation are inserted into the data analysis spreadsheet.
"Quantum_Data_Analysis.xlsx". Microsoft Excel spreadsheet file that calculates the mean HOM dip shift and the standard deviation of all the results for each measurement run and rotation speed of the experiment platform. All data is the difference between clockwise and anticlockwise rotation, so represents twice the HOM effect. A graph of Photon Delay (nm) is plotted against Rotation Speed (Rad./s), including corresponding calculated error bars.
"Fit HOM Dip.vi". LabView program for reading file "HOM Dip Data (1).txt" or "HOM Dip Data (2).txt" (located in "1stDay" and "2ndDay" folders respectively) and fitting a model to the HOM dip. The fitted model is inserted into the data analysis spreadsheet and the model parameters are inserted into the "Read Quantum Data.vi" to allow conversion of the coincidence values to position values.