High-Fidelity Bell-State Preparation with 40Ca+ Optical Qubits

被引：121

作者：

Clark, Craig R. ^{[1
]}

Tinkey, Holly N. ^{[1
]}

Sawyer, Brian C. ^{[1
]}

Meier, Adam M. ^{[1
]}

Burkhardt, Karl A. ^{[1
]}

Seck, Christopher M. ^{[1
,2
]}

Shappert, Christopher M. ^{[1
]}

Guise, Nicholas D. ^{[1
]}

Volin, Curtis E. ^{[1
,3
]}

Fallek, Spencer D. ^{[1
]}

Hayden, Harley T. ^{[1
]}

Rellergert, Wade G. ^{[1
]}

Brown, Kenton R. ^{[1
]}

机构：

[1] Georgia Tech Res Inst, Atlanta, GA 30332 USA

[2] Oak Ridge Natl Lab, 1 Bethel Valley Rd, Oak Ridge, TN 37830 USA

[3] Honeywell Quantum Solut, 303 S Technol Ct, Broomfield, CO 80021 USA

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 127卷 / 13期

关键词：

QUANTUM; ION; UNIVERSAL;

D O I：

10.1103/PhysRevLett.127.130505

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Entanglement generation in trapped-ion systems has relied thus far on two distinct but related geometric phase gate techniques: Molmer-Sorensen and light-shift gates. We recently proposed a variant of the light-shift scheme where the qubit levels are separated by an optical frequency [B. C. Sawyer and K. R. Brown, Phys. Rev. A 103, 022427 (2021)]. Here we report an experimental demonstration of this entangling gate using a pair of C-40(+) ions in a cryogenic surface-electrode ion trap and a commercial, high-power, 532 nm Nd:YAG laser. Generating a Bell state in 35 mu s, we directly measure an infidelity of 6(3) x 10(-4) without subtraction of experimental errors. The 532 nm gate laser wavelength suppresses intrinsic photon scattering error to similar to 1 x 10(-5).

引用

页数：5

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