A long-lived Zeeman trapped-ion qubit

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We demonstrate unprecedentedly long lifetimes for electron spin superposition states of a single trapped 40Ca+ ion. For a Ramsey measurement, we achieve a 1/e coherence time of 300(50) ms, while a spin-echo experiment yields a coherence time of 2.1(1) s. The latter corresponds to residual effective...

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Autor principal: Ruster, T.
Otros Autores: Schmiegelow, Christian Tomás, Kaufmann, H., Warschburger, C., Schmidt-Kaler, F., Poschinger, U.G
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Springer Verlag 2016
Acceso en línea:Registro en Scopus
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100 1 |a Ruster, T. 
245 1 2 |a A long-lived Zeeman trapped-ion qubit 
260 |b Springer Verlag  |c 2016 
270 1 0 |m Poschinger, U.G.; Institut für Physik, Universität Mainz, Staudingerweg 7, Germany; email: poschin@uni-mainz.de 
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504 |a Sekels GmbH (Ober-Mörlen) 
504 |a IBS Magnet (Berlin) 
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506 |2 openaire  |e Política editorial 
520 3 |a We demonstrate unprecedentedly long lifetimes for electron spin superposition states of a single trapped 40Ca+ ion. For a Ramsey measurement, we achieve a 1/e coherence time of 300(50) ms, while a spin-echo experiment yields a coherence time of 2.1(1) s. The latter corresponds to residual effective rms magnetic field fluctuations ≤2.7×10-12T during a measurement time of about 1500 s. The suppression of decoherence induced by fluctuating magnetic fields is achieved by combining a two-layer μ-metal shield, which reduces external magnetic noise by 20–30 dB for frequencies of 50 Hz–100 kHz, with Sm2Co17 permanent magnets for generating a quantizing magnetic field of 0.37 mT. Our results extend the coherence time of the simple-to-operate trapped-ion spin qubit to ultralong coherence times which so far have been observed only for magnetic insensitive transitions in atomic qubits with hyperfine structure. © 2016, Springer-Verlag Berlin Heidelberg.  |l eng 
593 |a Institut für Physik, Universität Mainz, Staudingerweg 7, Mainz, 55128, Germany 
593 |a Departamento de Física, FCEyN, UBA and IFIBA, Conicet, Pabellón 1, Ciudad Universitaria, Buenos Aires, 1428, Argentina 
690 1 0 |a ELECTROSPINNING 
690 1 0 |a IONS 
690 1 0 |a MAGNETIC FIELDS 
690 1 0 |a MAGNETIC MOMENTS 
690 1 0 |a MAGNETISM 
690 1 0 |a QUANTUM COMPUTERS 
690 1 0 |a SAMARIUM 
690 1 0 |a COHERENCE TIME 
690 1 0 |a ELECTRON SPINS 
690 1 0 |a HYPERFINE STRUCTURE 
690 1 0 |a MAGNETIC FIELD FLUCTUATIONS 
690 1 0 |a MAGNETIC NOISE 
690 1 0 |a MEASUREMENT TIME 
690 1 0 |a QUANTIZING MAGNETIC FIELD 
690 1 0 |a SUPERPOSITION STATE 
690 1 0 |a TRAPPED IONS 
700 1 |a Schmiegelow, Christian Tomás 
700 1 |a Kaufmann, H. 
700 1 |a Warschburger, C. 
700 1 |a Schmidt-Kaler, F. 
700 1 |a Poschinger, U.G. 
773 0 |d Springer Verlag, 2016  |g v. 122  |k n. 10  |p Appl Phys B  |x 09462171  |w (AR-BaUEN)CENRE-3776  |t Applied Physics B: Lasers and Optics 
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856 4 0 |u https://doi.org/10.1007/s00340-016-6527-4  |y DOI 
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