Protecting solid-state spins from a strongly coupled environment
Quantum memories are critical for solid-state quantum computing devices and a good quantum memory requires both long storage time and fast read/write operations. A promising system is the nitrogen-vacancy (NV) center in diamond, where the NV electronic spin serves as the computing qubit and a nearby...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2018-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aac542 |
| _version_ | 1827873410457272320 |
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| author | Mo Chen Won Kyu Calvin Sun Kasturi Saha Jean-Christophe Jaskula Paola Cappellaro |
| author_facet | Mo Chen Won Kyu Calvin Sun Kasturi Saha Jean-Christophe Jaskula Paola Cappellaro |
| author_sort | Mo Chen |
| collection | DOAJ |
| description | Quantum memories are critical for solid-state quantum computing devices and a good quantum memory requires both long storage time and fast read/write operations. A promising system is the nitrogen-vacancy (NV) center in diamond, where the NV electronic spin serves as the computing qubit and a nearby nuclear spin as the memory qubit. Previous works used remote, weakly coupled ^13 C nuclear spins, trading read/write speed for long storage time. Here we focus instead on the intrinsic strongly coupled ^14 N nuclear spin. We first quantitatively understand its decoherence mechanism, identifying as its source the electronic spin that acts as a quantum fluctuator. We then propose a scheme to protect the quantum memory from the fluctuating noise by applying dynamical decoupling on the environment itself. We demonstrate a factor of 3 enhancement of the storage time in a proof-of-principle experiment, showing the potential for a quantum memory that combines fast operation with long coherence time. |
| first_indexed | 2024-03-12T16:36:39Z |
| format | Article |
| id | doaj.art-a2d36b89d5234a1391aab474cc07aad2 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:36:39Z |
| publishDate | 2018-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-a2d36b89d5234a1391aab474cc07aad22023-08-08T14:50:14ZengIOP PublishingNew Journal of Physics1367-26302018-01-0120606301110.1088/1367-2630/aac542Protecting solid-state spins from a strongly coupled environmentMo Chen0https://orcid.org/0000-0002-2394-2442Won Kyu Calvin Sun1Kasturi Saha2Jean-Christophe Jaskula3Paola Cappellaro4https://orcid.org/0000-0003-3207-594XResearch Laboratory of Electronics, Massachusetts Institute of Technology , Cambridge, MA 02139, United States of America; Department of Mechanical Engineering, Massachusetts Institute of Technology , Cambridge, MA 02139, United States of AmericaResearch Laboratory of Electronics, Massachusetts Institute of Technology , Cambridge, MA 02139, United States of America; Department of Nuclear Science and Engineering, Massachusetts Institute of Technology , Cambridge, MA 02139, United States of AmericaResearch Laboratory of Electronics, Massachusetts Institute of Technology , Cambridge, MA 02139, United States of America; Department of Electrical Engineering, Indian Institute of Technology Bombay , Mumbai 400 076, IndiaResearch Laboratory of Electronics, Massachusetts Institute of Technology , Cambridge, MA 02139, United States of AmericaResearch Laboratory of Electronics, Massachusetts Institute of Technology , Cambridge, MA 02139, United States of America; Department of Nuclear Science and Engineering, Massachusetts Institute of Technology , Cambridge, MA 02139, United States of AmericaQuantum memories are critical for solid-state quantum computing devices and a good quantum memory requires both long storage time and fast read/write operations. A promising system is the nitrogen-vacancy (NV) center in diamond, where the NV electronic spin serves as the computing qubit and a nearby nuclear spin as the memory qubit. Previous works used remote, weakly coupled ^13 C nuclear spins, trading read/write speed for long storage time. Here we focus instead on the intrinsic strongly coupled ^14 N nuclear spin. We first quantitatively understand its decoherence mechanism, identifying as its source the electronic spin that acts as a quantum fluctuator. We then propose a scheme to protect the quantum memory from the fluctuating noise by applying dynamical decoupling on the environment itself. We demonstrate a factor of 3 enhancement of the storage time in a proof-of-principle experiment, showing the potential for a quantum memory that combines fast operation with long coherence time.https://doi.org/10.1088/1367-2630/aac542nitrogen-vacancy (NV) centerquantum controldynamical decouplingquantum fluctuator |
| spellingShingle | Mo Chen Won Kyu Calvin Sun Kasturi Saha Jean-Christophe Jaskula Paola Cappellaro Protecting solid-state spins from a strongly coupled environment New Journal of Physics nitrogen-vacancy (NV) center quantum control dynamical decoupling quantum fluctuator |
| title | Protecting solid-state spins from a strongly coupled environment |
| title_full | Protecting solid-state spins from a strongly coupled environment |
| title_fullStr | Protecting solid-state spins from a strongly coupled environment |
| title_full_unstemmed | Protecting solid-state spins from a strongly coupled environment |
| title_short | Protecting solid-state spins from a strongly coupled environment |
| title_sort | protecting solid state spins from a strongly coupled environment |
| topic | nitrogen-vacancy (NV) center quantum control dynamical decoupling quantum fluctuator |
| url | https://doi.org/10.1088/1367-2630/aac542 |
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