Laser-free trapped ion entangling gates with AESE: adiabatic elimination of spin-motion entanglement
We discuss a laser-free, two-qubit geometric phase gate technique for generating high-fidelity entanglement between two trapped ions. The scheme works by ramping the spin-dependent force on and off slowly relative to the gate detunings, which adiabatically eliminates the spin-motion entanglement (AE...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ad19f9 |
| _version_ | 1797359296343703552 |
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| author | R Tyler Sutherland Michael Foss-Feig |
| author_facet | R Tyler Sutherland Michael Foss-Feig |
| author_sort | R Tyler Sutherland |
| collection | DOAJ |
| description | We discuss a laser-free, two-qubit geometric phase gate technique for generating high-fidelity entanglement between two trapped ions. The scheme works by ramping the spin-dependent force on and off slowly relative to the gate detunings, which adiabatically eliminates the spin-motion entanglement (AESE). We show how gates performed with AESE can eliminate spin-motion entanglement with multiple modes simultaneously, without having to specifically tune the control field detunings. This is because the spin-motion entanglement is suppressed by operating the control fields in a certain parametric limit, rather than by engineering an optimized control sequence. We also discuss physical implementations that use either electronic or ferromagnetic magnetic field gradients. In the latter, we show how to ‘AESE’ the system by smoothly turning on the effective spin-dependent force by shelving from a magnetic field insensitive state to a magnetic field sensitive state slowly relative to the gate mode frequencies. We show how to do this with a Rabi or adiabatic rapid passage transition. Finally, we show how gating with AESE significantly decreases the gate’s sensitivity to common sources of motional decoherence, making it easier to perform high-fidelity gates at Doppler temperatures. |
| first_indexed | 2024-03-08T15:16:04Z |
| format | Article |
| id | doaj.art-36f92e5834d14257a13fa9d648469606 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-08T15:16:04Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-36f92e5834d14257a13fa9d6484696062024-01-10T12:41:45ZengIOP PublishingNew Journal of Physics1367-26302024-01-0126101301310.1088/1367-2630/ad19f9Laser-free trapped ion entangling gates with AESE: adiabatic elimination of spin-motion entanglementR Tyler Sutherland0Michael Foss-Feig1Quantinuum, 303 S Technology Ct , Broomfield, CO 80021, United States of America; Department of Electrical and Computer Engineering , University of Texas at San Antonio, San Antonio, TX 78249, United States of AmericaQuantinuum, 303 S Technology Ct , Broomfield, CO 80021, United States of AmericaWe discuss a laser-free, two-qubit geometric phase gate technique for generating high-fidelity entanglement between two trapped ions. The scheme works by ramping the spin-dependent force on and off slowly relative to the gate detunings, which adiabatically eliminates the spin-motion entanglement (AESE). We show how gates performed with AESE can eliminate spin-motion entanglement with multiple modes simultaneously, without having to specifically tune the control field detunings. This is because the spin-motion entanglement is suppressed by operating the control fields in a certain parametric limit, rather than by engineering an optimized control sequence. We also discuss physical implementations that use either electronic or ferromagnetic magnetic field gradients. In the latter, we show how to ‘AESE’ the system by smoothly turning on the effective spin-dependent force by shelving from a magnetic field insensitive state to a magnetic field sensitive state slowly relative to the gate mode frequencies. We show how to do this with a Rabi or adiabatic rapid passage transition. Finally, we show how gating with AESE significantly decreases the gate’s sensitivity to common sources of motional decoherence, making it easier to perform high-fidelity gates at Doppler temperatures.https://doi.org/10.1088/1367-2630/ad19f9trapped ionsquantum computinggatestwo qubit gatelaser-freequantum control |
| spellingShingle | R Tyler Sutherland Michael Foss-Feig Laser-free trapped ion entangling gates with AESE: adiabatic elimination of spin-motion entanglement New Journal of Physics trapped ions quantum computing gates two qubit gate laser-free quantum control |
| title | Laser-free trapped ion entangling gates with AESE: adiabatic elimination of spin-motion entanglement |
| title_full | Laser-free trapped ion entangling gates with AESE: adiabatic elimination of spin-motion entanglement |
| title_fullStr | Laser-free trapped ion entangling gates with AESE: adiabatic elimination of spin-motion entanglement |
| title_full_unstemmed | Laser-free trapped ion entangling gates with AESE: adiabatic elimination of spin-motion entanglement |
| title_short | Laser-free trapped ion entangling gates with AESE: adiabatic elimination of spin-motion entanglement |
| title_sort | laser free trapped ion entangling gates with aese adiabatic elimination of spin motion entanglement |
| topic | trapped ions quantum computing gates two qubit gate laser-free quantum control |
| url | https://doi.org/10.1088/1367-2630/ad19f9 |
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