Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.060502
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Funding
- Austrian FWF
- EU
- CoQuS
- FunMat
- DOC-fFORTE doctoral program
- Austrian Science Fund (FWF) [Z 118] Funding Source: researchfish
- Austrian Science Fund (FWF) [W1243, W1210] Funding Source: Austrian Science Fund (FWF)
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We report strong coupling between an ensemble of nitrogen-vacancy center electron spins in diamond and a superconducting microwave coplanar waveguide resonator. The characteristic scaling of the collective coupling strength with the square root of the number of emitters is observed directly. Additionally, we measure hyperfine coupling to C-13 nuclear spins, which is a first step towards a nuclear ensemble quantum memory. Using the dispersive shift of the cavity resonance frequency, we measure the relaxation time of the NV center at millikelvin temperatures in a nondestructive way.
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