Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Quantum 2.0 Conference and Exhibition

Universal Quantum Computing with Spin Waves: Three Methods

Kevin C. Cox, Przemysław Bienias, David H. Meyer, Donald P. Fahey, Joshua C. Hill, Alexey Vyacheslavovich Gorshkov, Paul D. Kunz

Published Jan 1, 2022• 0 citations
Publisher

Abstract

Holographic spin-wave excitations in atoms are commonly used to build high-performance quantum memories. Here we show three methods that enable not just storage, but universal quantum computing, with atomic spin waves.
DOI
10.1364/quantum.2022.qw3a.4

Related papers

Quantum-memory-based spin-wave processor for light

Michal P. Parniak, Mateusz Mazelanik, Adam Leszczyński +3 more

High performance quantum networks require extensive utilization of multiplexing techniques, relaying on photonic spatial and temporal structure. Multimode quantum memories for light, where photons are stored in the form of collective atomic excitations, may constitute building blocks of such networks; however, a requirement arises to implement complex linear operations on the stored excitations. In our photonic processor we experimentally demonstrate how the off-resonant ac-Stark shift (ACS) may be employed to manipulate the spatial and temporal structure of photons stored in a highly multimode quantum memory as the collective atomic excitations – spin waves.

•Feb 28, 2020•0 citations

Quantum entanglement using trapped atomic spins

Li You, Michael Chapman

We propose an implementation for quantum logic and computing using trapped atomic spins of two different species, interacting via direct magnetic spin-spin interaction. In this scheme, the spins (electronic or nuclear) of distantly spaced trapped neutral atoms serve as the qubit arrays for quantum information processing and storage, and the controlled interaction between two spins, as required for universal quantum computing, is implemented in a three-step process that involves state swapping with a movable auxiliary spin.

arXiv:quant-ph/0002029•Physical Review A•Oct 11, 2000•63 citations

Efficient and robust collective excitation transfer in a multimode quantum memory using modulated adiabatic pulses

Ao-Lin Guo, Tao Tu, Guang‐Can Guo +1 more

Quantum memories are building blocks for a variety of quantum technologies. However, the collective transfer between optical excitations and spin-wave excitations determines the performance of the quantum memory. Here we propose a method for collective excitations transfer with high efficiency and fidelity in a multimode quantum memory. The pulse uses modulations of the control parameters to cancel the nonadiabatic transitions during the evolution. We demonstrate the universality of the control pulse by simulations for an atomic frequency comb spin-wave quantum memory. The protocol is robust to various experimental imperfections in the pulse amplitude and duration. The protocol also allows one to achieve high multiplexed storage at small cost on efficiency reduction. The protocol is particularly useful in retaining the phase coherence since the environment dissipation would decohere the system. These results pave a way for efficient and robust coherent manipulations in a multiplexed quantum memory.

Physical Review A•Aug 4, 2021•7 citations

Making the unreal real in quantum computing

Alane Lim

Review proposes ways to realize spin-based qubits with floating electrons, which could enable universal quantum computation.

Scilight•Mar 18, 2024•0 citations

High-Capacity Angularly-Multiplexed Holographic Memory for Enhanced-Rate Generation of Photons

Radosław Chrapkiewicz, Michał Dąbrowski, Wojciech Wasilewski

We experimentally demonstrate an angularly-multiplexed holographic memory capable of intrinsic generation, storage and retrieval of photons, based on off-resonant Raman interaction in warm rubidium-87 vapors. The memory capacity of up to 60 independent atomic spin-wave modes is evidenced by analyzing angular distributions of coincidences between Stokes and time-delayed anti-Stokes photons, observed down to the single spin-wave excitation level for several $\mu$s memory lifetime. We also show how to practically enhance rates of single and multiple photons generation by combining our multimode emissive memory with existing fast optical switches.

•Apr 20, 2016•2 citations

Connecting photons to spins

Jörg Schmiedmayer

I will discuss three examples of connecting optical and micro wave photons to spins as quantum memory and compare their advantages and disadvantages for implementations in quantum information devices.

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)•Jun 1, 2013•0 citations
High performance quantum networks require extensive utilization of multiplexing techniques, relaying on photonic spatial and temporal structure. Multimode quantum memories for light, where photons are stored in the form of collective atomic excitations, may constitute building blocks of such networks; however, a requirement arises to implement complex linear operations on the stored excitations. In our photonic processor we experimentally demonstrate how the off-resonant ac-Stark shift (ACS) may be employed to manipulate the spatial and temporal structure of photons stored in a highly multimode quantum memory as the collective atomic excitations – spin waves.
We propose an implementation for quantum logic and computing using trapped atomic spins of two different species, interacting via direct magnetic spin-spin interaction. In this scheme, the spins (electronic or nuclear) of distantly spaced trapped neutral atoms serve as the qubit arrays for quantum information processing and storage, and the controlled interaction between two spins, as required for universal quantum computing, is implemented in a three-step process that involves state swapping with a movable auxiliary spin.
Quantum memories are building blocks for a variety of quantum technologies. However, the collective transfer between optical excitations and spin-wave excitations determines the performance of the quantum memory. Here we propose a method for collective excitations transfer with high efficiency and fidelity in a multimode quantum memory. The pulse uses modulations of the control parameters to cancel the nonadiabatic transitions during the evolution. We demonstrate the universality of the control pulse by simulations for an atomic frequency comb spin-wave quantum memory. The protocol is robust to various experimental imperfections in the pulse amplitude and duration. The protocol also allows one to achieve high multiplexed storage at small cost on efficiency reduction. The protocol is particularly useful in retaining the phase coherence since the environment dissipation would decohere the system. These results pave a way for efficient and robust coherent manipulations in a multiplexed quantum memory.
We experimentally demonstrate an angularly-multiplexed holographic memory capable of intrinsic generation, storage and retrieval of photons, based on off-resonant Raman interaction in warm rubidium-87 vapors. The memory capacity of up to 60 independent atomic spin-wave modes is evidenced by analyzing angular distributions of coincidences between Stokes and time-delayed anti-Stokes photons, observed down to the single spin-wave excitation level for several μ\muμs memory lifetime. We also show how to practically enhance rates of single and multiple photons generation by combining our multimode emissive memory with existing fast optical switches.