Cavity QED with Magnetically Coupled Collective Spin States

被引：273

作者：

Amsuess, R. ^{[1
]}

Koller, Ch. ^{[1
,2
]}

Noebauer, T. ^{[1
]}

Putz, S. ^{[1
]}

Rotter, S. ^{[3
]}

Sandner, K. ^{[4
]}

Schneider, S. ^{[1
]}

Schramboeck, M. ^{[1
,2
]}

Steinhauser, G. ^{[1
]}

Ritsch, H. ^{[4
]}

Schmiedmayer, J. ^{[1
]}

Majer, J. ^{[1
,2
]}

机构：

[1] TU Wien, Vienna Ctr Quantum Sci & Technol, A-1020 Vienna, Austria

[2] TU Wien, Ctr Micro & Nanostruct ZNMS, A-1040 Vienna, Austria

[3] TU Wien, Inst Theoret Phys, A-1040 Vienna, Austria

[4] Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 06期

基金：

奥地利科学基金会;

关键词：

ABSORPTION-SPECTRA; DIAMOND; SYSTEM;

D O I：

10.1103/PhysRevLett.107.060502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

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