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#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
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from braket.ir.ahs.physical_field import PhysicalField
from braket.ir.ahs.program_v1 import Program
from braket.analog_hamiltonian_simulator.rydberg.constants import FIELD_UNIT, SPACE_UNIT, TIME_UNIT
[docs]
def convert_unit(program: Program) -> Program:
"""
For a given program, convert the SI units to units that are more
suitable for local simulator
Args:
program (Program): An analog simulation program for Rydberg system
Returns:
Program: A new Program object with units converted for simulation
"""
setup = program.setup
sites = setup.ahs_register.sites
new_sites = [[float(site[0]) / SPACE_UNIT, float(site[1]) / SPACE_UNIT] for site in sites]
new_setup = {"ahs_register": {"sites": new_sites, "filling": setup.ahs_register.filling}}
hamiltonian = program.hamiltonian
driving_fields = hamiltonian.drivingFields
local_detunings = hamiltonian.localDetuning
new_driving_fields, new_local_detunings = [], []
for driving_field in driving_fields:
new_amplitude = _convert_unit_for_field(driving_field.amplitude)
new_phase = _convert_unit_for_field(driving_field.phase, False)
new_detuning = _convert_unit_for_field(driving_field.detuning)
new_driving_field = {
"amplitude": new_amplitude,
"phase": new_phase,
"detuning": new_detuning,
}
new_driving_fields.append(new_driving_field)
for local_detuning in local_detunings:
new_magnitude = _convert_unit_for_field(local_detuning.magnitude)
new_local_detuning = {"magnitude": new_magnitude}
new_local_detunings.append(new_local_detuning)
new_hamiltonian = {"drivingFields": new_driving_fields, "localDetuning": new_local_detunings}
new_program = Program(
setup=new_setup,
hamiltonian=new_hamiltonian,
)
return new_program
def _convert_unit_for_field(field: PhysicalField, convertvalues: bool = True) -> dict:
"""
For a given field, convert the unit of time from second to microsecond,
and convert the unit of values from Hz to MHz if `convertvalues` =True
Args:
field (PhysicalField): The physical field for converting unit
convertvalues (bool): If true then convert the unit of values from Hz to MHz,
otherwise convert the unit of time from second to microsecond. Default: True.
Returns:
dict: The field with units converted
"""
times = [float(time) / TIME_UNIT for time in field.time_series.times]
if convertvalues:
values = [float(value) / FIELD_UNIT for value in field.time_series.values]
else:
values = [float(value) for value in field.time_series.values]
new_field = {"pattern": field.pattern, "time_series": {"times": times, "values": values}}
return new_field