A long-lived Zeeman trapped-ion qubit
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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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_09462171_v122_n10_p_Ruster |
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todo:paper_09462171_v122_n10_p_Ruster2023-10-03T15:49:18Z A long-lived Zeeman trapped-ion qubit Ruster, T. Schmiegelow, C.T. Kaufmann, H. Warschburger, C. Schmidt-Kaler, F. Poschinger, U.G. Electrospinning Ions Magnetic fields Magnetic moments Magnetism Quantum computers Samarium Coherence time Electron spins Hyperfine structure Magnetic field fluctuations Magnetic noise Measurement time Quantizing magnetic field Superposition state Trapped ions 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. Fil:Schmiegelow, C.T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09462171_v122_n10_p_Ruster |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Electrospinning Ions Magnetic fields Magnetic moments Magnetism Quantum computers Samarium Coherence time Electron spins Hyperfine structure Magnetic field fluctuations Magnetic noise Measurement time Quantizing magnetic field Superposition state Trapped ions |
| spellingShingle |
Electrospinning Ions Magnetic fields Magnetic moments Magnetism Quantum computers Samarium Coherence time Electron spins Hyperfine structure Magnetic field fluctuations Magnetic noise Measurement time Quantizing magnetic field Superposition state Trapped ions Ruster, T. Schmiegelow, C.T. Kaufmann, H. Warschburger, C. Schmidt-Kaler, F. Poschinger, U.G. A long-lived Zeeman trapped-ion qubit |
| topic_facet |
Electrospinning Ions Magnetic fields Magnetic moments Magnetism Quantum computers Samarium Coherence time Electron spins Hyperfine structure Magnetic field fluctuations Magnetic noise Measurement time Quantizing magnetic field Superposition state Trapped ions |
| description |
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. |
| format |
JOUR |
| author |
Ruster, T. Schmiegelow, C.T. Kaufmann, H. Warschburger, C. Schmidt-Kaler, F. Poschinger, U.G. |
| author_facet |
Ruster, T. Schmiegelow, C.T. Kaufmann, H. Warschburger, C. Schmidt-Kaler, F. Poschinger, U.G. |
| author_sort |
Ruster, T. |
| title |
A long-lived Zeeman trapped-ion qubit |
| title_short |
A long-lived Zeeman trapped-ion qubit |
| title_full |
A long-lived Zeeman trapped-ion qubit |
| title_fullStr |
A long-lived Zeeman trapped-ion qubit |
| title_full_unstemmed |
A long-lived Zeeman trapped-ion qubit |
| title_sort |
long-lived zeeman trapped-ion qubit |
| url |
http://hdl.handle.net/20.500.12110/paper_09462171_v122_n10_p_Ruster |
| work_keys_str_mv |
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1807315947241865216 |