F_purcell

Purcell factor, i.e., the increase in decay to the ZPL thanks to the resonant cavity.

It should be easy to achieve

ξ_debye_waller

Debye-Waller factor, i.e., the fraction of radiative decays that fall in the zero phonon line without a cavity. In other words, how many of the emitted photons leave without interference from phonons.

It should be easy to achieve

ξ_quantum_efficiency

Also called "internal quantum efficiency". The ratio of radiative to total decay (including non-radiative decay, e.g., due to "shelf states").

It should be easy to achieve

ξ_optical_branching

There might be a number of close-together optical transitions for the given emitter. This gives us the fraction we care about.

It should be easy to achieve

η_blinking

Drop in efficiency due to the emitter blinking out of existence.

It should be easy to achieve

Dark Counts

It should be easy to achieve

η_binning

Drop in efficiency due to the finite time-binning while waiting for light to come from the emitter.

It should be easy to achieve

fdc_pump_leak

Frequency of dark counts due to leaks from the pump.

It should be easy to achieve

fdc_freespace_detector

Frequency of dark counts inherent to an off-chip detector.

It should be easy to achieve

fdc_snspd_detector

Frequency of dark counts inherent to an on-chip SNSPD.

It should be easy to achieve

Photonic switch

It should be easy to achieve

η_switch_per_depth

It should be easy to achieve

Diamond to photonic switch

It should be easy to achieve

η_free_space_e2s

The losses in the imagin system and coupling to free space.

It should be easy to achieve

η_chiplet_e2s

It should be easy to achieve

Photonic switch to detectors

It should be easy to achieve

η_free_space_s2d

It should be easy to achieve

η_fiber_s2d

It should be easy to achieve

η_onchip_SNSPD

The inefficiences in the nanowire detectors.

It should be easy to achieve

On chip emitter coupling OLD

It should be easy to achieve

η_1x4_switch

The losses due to routing in the chip.

It should be easy to achieve

η_chiplet

The losses due to couplings between the diamond chiplet and the mainboard.

It should be easy to achieve

η_SNSPDs

The inefficiences in the nanowire detectors.

It should be easy to achieve

Free space emitter coupling OLD

It should be easy to achieve

η_1x8_MZI_Tree

The losses due to routing in the chip.

It should be easy to achieve

η_imaging

The losses in the imagin system and coupling to free space.

It should be easy to achieve

η_detectors

The inefficiencies in the detector.

It should be easy to achieve

Indistinguishability of photons

It should be easy to achieve

Δλ_rel_sys

The expected systematic error in the optical resonance tuning (e.g., when strain tuning).

It should be easy to achieve

Δλ_rel_rand

The spectral diffusion of the emitters, i.e., the uncontrollable movements of the resonance due to the environment.

It should be easy to achieve

Γ_emitter

Intrinsic linewidth of a single emitter.

It should be easy to achieve

Excitation Control

It should be easy to achieve

f_reconfig

Speed at which spots can be turned on or off.

It should be easy to achieve

r_extinction

How dark are spots that are supposed to be dark. If not perfect, it can lead to spurious excitations.

It should be easy to achieve

MW Control of Emitters

It should be easy to achieve

T1e

T1 time of the electron spin achieved after cooling (and dynamical decoupling).

It should be easy to achieve

T2e

T2 time of the electron spin achieved after dynamical decoupling.

It should be easy to achieve

T1n

T1 time of the nuclear spin achieved.

It should be easy to achieve

T2n

T2 time of the nuclear spin achieved after dynamical decoupling.

It should be easy to achieve

Tcphase

Time for a CPHASE gate between e and n spins.

It should be easy to achieve

Tegate

Time for a single qubit gate on the electron spin.

It should be easy to achieve

Tngate

Time for a single qubit gate on the nuclear spin.

It should be easy to achieve

ε_init_e

Electron spin initialization error.

It should be easy to achieve

ε_init_n

Nuclear spin initialization error.

It should be easy to achieve

Scalability

It should be easy to achieve

N_strain_control

The number of color centers we can reliably strain tune.

It should be easy to achieve

N_em_control

The number of color centers we can reliably address with RF EM fields.

It should be easy to achieve

N_excitation_control

Number of different target spots that can be controlled at the same time.

It should be easy to achieve

To be derived

It should be easy to achieve

Tmeas

Time to measure the electron spin, depends on the optical lifetime.

It should be easy to achieve

p_cphase

Fidelity of gate, depends on ground manifold lifetime and gate duration.

It should be easy to achieve

p_egate

Fidelity of gate, depends on ground manifold lifetime and gate duration.

It should be easy to achieve

p_ngate

Fidelity of gate, depends on ground manifold lifetime and gate duration.

It should be easy to achieve

p_meas

Infidelity of measurement results, mostly due to dark counts.

It should be easy to achieve

Tbk

Time for one BK attempt (exciting both spins, waiting for their decay, looking for the photon leak)

It should be easy to achieve

Neglected

It should be easy to achieve

RF crosstalk

It should be easy to achieve

RF heating

It should be easy to achieve