Optical multi-qubit gate operations on an excitation blockaded atomic
quantum register
- URL: http://arxiv.org/abs/2210.06212v1
- Date: Wed, 12 Oct 2022 13:59:58 GMT
- Title: Optical multi-qubit gate operations on an excitation blockaded atomic
quantum register
- Authors: Adam Kinos and Klaus M{\o}lmer
- Abstract summary: We consider a multi-qubit system of atoms or ions with two computational ground states and an interacting excited state.
We present a simple laser excitation protocol that yields a complex phase factor on any desired multi-qubit product state.
A detailed analysis of the multi-qubit gate performance is provided.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We consider a multi-qubit system of atoms or ions with two computational
ground states and an interacting excited state in the so-called blockade
regime, such that only one qubit can be excited at any one time. Examples of
such systems are rare-earth-ion-doped crystals and neutral atoms trapped in
tweezer arrays. We present a simple laser excitation protocol that yields a
complex phase factor on any desired multi-qubit product state, and which can be
used to implement multi-qubit gates such as the n-bit Toffoli gates. The
operation is performed using only two pulses, where each pulse simultaneously
address all qubits. By the use of complex hyperbolic secant pulses our scheme
is robust and permits complete transfers to and from the excited states despite
the variability of interaction parameters. A detailed analysis of the
multi-qubit gate performance is provided.
Related papers
- Fast quantum gates for exchange-only qubits using simultaneous exchange pulses [0.0]
This paper aims to develop a faster implementation of single-qubit and two-qubit gates using simultaneous exchange pulses.
We introduce pulse sequences in which single-qubit gates could be executed faster and show that subsequences on three spins in two-qubit gates could be implemented in fewer steps.
arXiv Detail & Related papers (2024-09-09T17:45:17Z) - Pulse-controlled qubit in semiconductor double quantum dots [57.916342809977785]
We present a numerically-optimized multipulse framework for the quantum control of a single-electron charge qubit.
A novel control scheme manipulates the qubit adiabatically, while also retaining high speed and ability to perform a general single-qubit rotation.
arXiv Detail & Related papers (2023-03-08T19:00:02Z) - Two qubits in one transmon -- QEC without ancilla hardware [68.8204255655161]
We show that it is theoretically possible to use higher energy levels for storing and controlling two qubits within a superconducting transmon.
The additional qubits could be used in algorithms which need many short-living qubits in error correction or by embedding effecitve higher connectivity in qubit networks.
arXiv Detail & Related papers (2023-02-28T16:18:00Z) - Quantum emulation of the transient dynamics in the multistate
Landau-Zener model [50.591267188664666]
We study the transient dynamics in the multistate Landau-Zener model as a function of the Landau-Zener velocity.
Our experiments pave the way for more complex simulations with qubits coupled to an engineered bosonic mode spectrum.
arXiv Detail & Related papers (2022-11-26T15:04:11Z) - High fidelity two-qubit gates on fluxoniums using a tunable coupler [47.187609203210705]
Superconducting fluxonium qubits provide a promising alternative to transmons on the path toward large-scale quantum computing.
A major challenge for multi-qubit fluxonium devices is the experimental demonstration of a scalable crosstalk-free multi-qubit architecture.
Here, we present a two-qubit fluxonium-based quantum processor with a tunable coupler element.
arXiv Detail & Related papers (2022-03-30T13:44:52Z) - Parallel Gate Operations Fidelity in a Linear Array of Flip-Flop Qubits [0.0]
Quantum computers based on silicon are promising candidates for long term universal quantum computation.
Flip-flop qubit is a donor based qubit (DQ) where interactions between qubits are achievable for distance up to several hundred nanometers.
In this work, a linear array of flip-flop qubits is considered and the unwanted mutual qubit interactions due to the simultaneous application of two one-qubit and two two-qubit gates are included in the quantum gate simulations.
arXiv Detail & Related papers (2021-10-25T14:15:47Z) - Fast high-fidelity single-qubit gates for flip-flop qubits in silicon [68.8204255655161]
flip-flop qubit is encoded in the states with antiparallel donor-bound electron and donor nuclear spins in silicon.
We study the multilevel system that is formed by the interacting electron and nuclear spins.
We propose an optimal control scheme that produces fast and robust single-qubit gates in the presence of low-frequency noise.
arXiv Detail & Related papers (2021-01-27T18:37:30Z) - Fast multi-qubit gates by adiabatic evolution in interacting excited
state manifolds [0.0]
We show that adiabatic passage along the dark eigenstate of excitation exchange interactions can be used to implement fast multi-qubit gates.
Our theoretical estimates and numerical simulations show that these multi-qubit Rydberg gates are possible with errors below 1% for up to 20 qubits.
arXiv Detail & Related papers (2020-06-12T09:39:04Z) - Universal non-adiabatic control of small-gap superconducting qubits [47.187609203210705]
We introduce a superconducting composite qubit formed from two capacitively coupled transmon qubits.
We control this low-frequency CQB using solely baseband pulses, non-adiabatic transitions, and coherent Landau-Zener interference.
This work demonstrates that universal non-adiabatic control of low-frequency qubits is feasible using solely baseband pulses.
arXiv Detail & Related papers (2020-03-29T22:48:34Z) - Signal processing techniques for efficient compilation of controlled
rotations in trapped ions [0.0]
We consider a sequence of equal all-to-all MS operations, interleaved with single qubit gates that act only on one special qubit.
We find that it is possible to perform an arbitray SU(2) rotation on the special qubit if and only if all other qubits are in the state.
Such controlled rotation gates with N-1 control qubits require 2N applications of the MS gate, and can be mapped to a conventional Toffoli gate by demoting a single qubit to ancilla.
arXiv Detail & Related papers (2020-01-15T11:02:56Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.