aiqbench analysis
The result is a lab-scale measurement of dephasing time (T2*) in a diamond spin system, with a 6x gain over P1-defect baselines at 25 Gauss. The advantage shrinks with field strength and reverses by 800 G, so it is a conditional result rather than a general improvement. Readers should also note that the article gives the timescale inconsistently ("112s" in one place, "microseconds" in others), so the unit should be checked against the original paper before the figure is relied on.
Tsukuba Team Extends Qubit Coherence Past Limits in Diamond
At 25 Gauss, a ¹⁵NV⁻ probe within an optically polarized NV⁻ spin bath maintains coherence for 112s, six times longer than achieved using a comparable density of traditional P1 defects (18. 1s). This advantage diminishes with increasing magnetic fields, reversing entirely by 800G where the polarized bath actually performs worse.
Optically polarizing a nitrogen-vacancy (NV⁻) centre spin bath at low magnetic fields extends dephasing times beyond those seen in typical nitrogen-rich diamond containing substitutional nitrogen (P1) centres. Specifically, at twenty-five Gauss, the dephasing time reaches one hundred and twelve microseconds for a ¹⁵NV⁻ probe within a polarized NV⁻ bath; this is six times longer than achieved with an equivalent density of P1 centres which measure eighteen point one microsecond. However,…
Excerpt shown under the publisher's RSS terms · 70 words · full text and figures are on the publisher's site
