nv_element#

Device elements for NV centers.

Currently only for the electronic qubit, but could be extended for other qubits (eg. carbon qubit).

Module Contents#

Classes#

`Ports`	Submodule containing the ports.
`ClockFrequencies`	Submodule with clock frequencies specifying the transitions to address.
`SpectroscopyOperationHermiteMW`	Convert the SpectroscopyOperation into a hermite microwave pulse.
`ResetSpinpump`	Submodule containing parameters to run the spinpump laser with a square pulse.
`Measure`	Submodule containing parameters to read out the spin state of the NV center.
`ChargeReset`	Submodule containing parameters to run an ionization laser square pulse to reset the NV.
`CRCount`	Submodule containing parameters to run the ionization laser and the spin pump laser.
`RxyHermite`	Submodule containing parameters to perform an Rxy operation
`BasicElectronicNVElement`	A device element representing an electronic qubit in an NV center.

class Ports(parent: qcodes.instrument.base.InstrumentBase, name: str, **kwargs: float)[source]#

Bases: qcodes.instrument.InstrumentModule

Submodule containing the ports.

microwave[source]#: Name of the element’s microwave port.

optical_control[source]#: Port to control the device element with optical pulses.

optical_readout[source]#: Port to readout photons from the device element.

class ClockFrequencies(parent: qcodes.instrument.base.InstrumentBase, name: str, **kwargs: float)[source]#

Bases: qcodes.instrument.InstrumentModule

Submodule with clock frequencies specifying the transitions to address.

f01[source]#: Microwave frequency to resonantly drive the electron spin state of a negatively charged diamond NV center from the 0-state to 1-state Doherty et al. [DMD+13].

spec[source]#: Parameter that is swept for a spectroscopy measurement. It does not track properties of the device element.

ge0[source]#: Transition frequency from the m_s=0 state to the E_x,y state

ge1[source]#: Transition frequency from the m_s=+-1 state to any of the A_1, A_2, or E_1,2 states

ionization[source]#: Frequency of the green ionization laser for manipulation of the NVs charge state.

class SpectroscopyOperationHermiteMW(parent: qcodes.instrument.base.InstrumentBase, name: str, **kwargs: float)[source]#

Bases: qcodes.instrument.InstrumentModule

Convert the SpectroscopyOperation into a hermite microwave pulse.

This class contains parameters with a certain amplitude and duration for spin-state manipulation.

The modulation frequency of the pulse is determined by the clock spec in ClockFrequencies.

amplitude[source]#: Amplitude of spectroscopy pulse

duration[source]#: Duration of the MW pulse.

class ResetSpinpump(parent: qcodes.instrument.base.InstrumentBase, name: str, **kwargs: float)[source]#

Bases: qcodes.instrument.InstrumentModule

Submodule containing parameters to run the spinpump laser with a square pulse.

This should reset the NV to the \(|0\rangle\) state.

amplitude[source]#: Amplitude of reset pulse

duration[source]#: Duration of reset pulse

class Measure(parent: qcodes.instrument.base.InstrumentBase, name: str, **kwargs: float)[source]#

Bases: qcodes.instrument.InstrumentModule

Submodule containing parameters to read out the spin state of the NV center.

Excitation with a readout laser from the \(|0\rangle\) to an excited state. Acquisition of photons when decaying back into the \(|0\rangle\) state.

pulse_amplitude[source]#: Amplitude of readout pulse

pulse_duration[source]#: Readout pulse duration

acq_duration[source]#: Duration of the acquisition.

acq_delay[source]#: Delay between the start of the readout pulse and the start of the acquisition.

acq_channel[source]#: Acquisition channel of this device element.

time_source[source]#: Optional time source, in case the Timetag acquisition protocols are used. Please see that protocol for more information.

time_ref[source]#: Optional time reference, in case Timetag or TimetagTrace acquisition protocols are used. Please see those protocols for more information.

class ChargeReset(parent: qcodes.instrument.base.InstrumentBase, name: str, **kwargs: float)[source]#

Bases: qcodes.instrument.InstrumentModule

Submodule containing parameters to run an ionization laser square pulse to reset the NV.

After resetting, the qubit should be in its negatively charged state.

amplitude[source]#: Amplitude of charge reset pulse.

duration[source]#: Duration of the charge reset pulse.

class CRCount(parent: qcodes.instrument.base.InstrumentBase, name: str, **kwargs: float | None)[source]#

Bases: qcodes.instrument.InstrumentModule

Submodule containing parameters to run the ionization laser and the spin pump laser.

This uses a photon count to perform a charge and resonance count.

readout_pulse_amplitude[source]#: Amplitude of readout pulse

spinpump_pulse_amplitude[source]#: Amplitude of spin-pump pulse

readout_pulse_duration[source]#: Readout pulse duration

spinpump_pulse_duration[source]#: Readout pulse duration

acq_duration[source]#: Duration of the acquisition.

acq_delay[source]#: Delay between the start of the readout pulse and the start of the acquisition.

acq_channel[source]#: Default acquisition channel of this device element.

class RxyHermite(parent: qcodes.instrument.base.InstrumentBase, name: str, **kwargs: float | None)[source]#

Bases: qcodes.instrument.InstrumentModule

Submodule containing parameters to perform an Rxy operation using a Hermite pulse.

amp180[source]#: Amplitude of \(\pi\) pulse.

skewness[source]#: First-order amplitude to the Hermite pulse envelope.

duration[source]#: Duration of the pi pulse.

class BasicElectronicNVElement(name: str, **kwargs)[source]#

Bases: quantify_scheduler.device_under_test.device_element.DeviceElement

A device element representing an electronic qubit in an NV center.

The submodules contain the necessary qubit parameters to translate higher-level operations into pulses. Please see the documentation of these classes.

Examples

Qubit parameters can be set through submodule attributes

from quantify_scheduler import BasicElectronicNVElement

qubit = BasicElectronicNVElement("q2")

qubit.rxy.amp180(0.1)
qubit.measure.pulse_amplitude(0.25)
qubit.measure.pulse_duration(300e-9)
qubit.measure.acq_delay(430e-9)
qubit.measure.acq_duration(1e-6)
...

Ellipsis

spectroscopy_operation: SpectroscopyOperationHermiteMW[source]#: Submodule SpectroscopyOperationHermiteMW.

ports: Ports[source]#: Submodule Ports.

clock_freqs: ClockFrequencies[source]#: Submodule ClockFrequencies.

reset: ResetSpinpump[source]#: Submodule ResetSpinpump.

charge_reset: ChargeReset[source]#: Submodule ChargeReset.

measure: Measure[source]#: Submodule Measure.

pulse_compensation: quantify_scheduler.device_under_test.transmon_element.PulseCompensationModule[source]#: Submodule PulseCompensationModule.

cr_count: CRCount[source]#: Submodule CRCount.

rxy: RxyHermite[source]#: Submodule Rxy.

_generate_config() → dict[str, dict[str, quantify_scheduler.backends.graph_compilation.OperationCompilationConfig]][source]#

Generate part of the device configuration specific to a single qubit.

This method is intended to be used when this object is part of a device object containing multiple elements.

generate_device_config() → quantify_scheduler.backends.graph_compilation.DeviceCompilationConfig[source]#

Generate a valid device config for the quantify-scheduler.

This makes use of the compile_circuit_to_device_with_config_validation() function.

This enables the settings of this qubit to be used in isolation.