Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session M65: Quantum Information in AMO Physics I
8:00 AM–11:00 AM,
Wednesday, March 8, 2023
Room: Room 414
Sponsoring
Unit:
DAMOP
Chair: Sebastian Will, Columbia University
Abstract: M65.00006 : Free Electrons as a Universal Tool for Photonic Quantum Computation*
9:24 AM–9:36 AM
Presenter:
Gefen Baranes
(Massachusetts Institute of Technology)
Authors:
Gefen Baranes
(Massachusetts Institute of Technology)
Shiran Even-Haim
(Technion - Israel Institute of Technology)
Ron Ruimy
(Technion - Israel Institute of Technology)
Alexey Gorlach
(Technion - Israel Institute of Technology)
Raphael Dahan
(Technion - Israel Institute of Technology)
Ido Kaminer
(Technion - Israel Institute of Technology)
Recent advances in ultrafast electron microscopy enable the coherent shaping of free-electron wavefunctions into qubits and qudits that fundamentally differ from previously proposed matter ancilla qubits: free-electrons are flying qubits; they interact with multiple spatially separated photonic modes and implement ultrafast coupling that does not limit coherence times.
Here we propose using the strong interactions of free-electrons with light as a source for optical cat and GKP states. Our approach enables the generation of optical GKP states with above 10 dB squeezing at a high post-selection probability. Moreover, we show that the interaction enables readout, error correction, and control over the GKP state. Additionally, by interacting with multiple GKP states, the free-electron qubit can be used to create multi-qubit gates. We propose a scheme for creating multipartite highly entangled states, such as GHZ states and cluster states, for quantum communication and measurement-based quantum computation.
*Work supported by the ERC Starting Grant 851780-NanoEP and the European Union Horizon Research Grant 964591 SMART-electron.
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