RT Journal Article
T1 Ultraviolet laser pulses with multigigahertz repetition rate and multiwatt average power for fast trapped-ion entanglement operations
A1 Hussain, Mahmood Irtiza
A1 Heinrich, Daniel
A1 Guevara-Betsch, Milena
A1 Torrontegui Muñoz, Erik
A1 García-Ripoll, Juan José
A1 Roos, Christian F.
A1 Blatt, Rainer
AB The conventional approach to perform two-qubit gate operations in trapped ions relies on exciting the ions on motional sidebands with laser light, which is an inherently slow process. One way to implement a fast entangling gate protocol requires a suitable pulsed laser to increase the gate speed by orders of magnitude. However, the realization of such a fast entangling gate operation presents a big technical challenge, as such the required laser source is not available off-the-shelf. For this, we have engineered an ultrafast entangling gate source based on a frequency comb. The source generates bursts of several hundred mode-locked pulses with pulse energy ∼800 pJ at 5 GHz repetition rate at 393.3 nm and complies with all requirements for implementing a fast two-qubit gate operation. Using a single, chirped ultraviolet pulse, we demonstrate a rapid adiabatic passage in a Ca+ ion. To verify the applicability and projected performance of the laser system for inducing entangling gates we run simulations based on our source parameters. The gate time can be faster than a trap period with an error approaching 10−4.
PB American Physical Society
SN 2331-7019
YR 2021
FD 2021-02
LK https://hdl.handle.net/10016/32332
UL https://hdl.handle.net/10016/32332
LA eng
DS e-Archivo
RD 3 may. 2024