Universal and ultrafast quantum computation based on free-electron-polariton blockade

• URL: http://arxiv.org/abs/2303.13275v1
• Date: Thu, 23 Mar 2023 13:55:11 GMT
• Title: Universal and ultrafast quantum computation based on free-electron-polariton blockade
• Authors: Aviv Karnieli, Shai Tsesses, Renwen Yu, Nicholas Rivera, Ady Arie, Ido Kaminer and Shanhui Fan
• Abstract summary: We introduce a new element into cavity-QED - a free charged particle, acting as a flying qubit. We demonstrate that our approach enables ultrafast, deterministic and universal discrete-variable quantum computation.
• Score: 0.3463527836552467
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Cavity quantum electrodynamics (QED), wherein a quantum emitter is coupled to electromagnetic cavity modes, is a powerful platform for implementing quantum sensors, memories, and networks. However, due to the fundamental tradeoff between gate fidelity and execution time, as well as limited scalability, the use of cavity-QED for quantum computation was overtaken by other architectures. Here, we introduce a new element into cavity-QED - a free charged particle, acting as a flying qubit. Using free electrons as a specific example, we demonstrate that our approach enables ultrafast, deterministic and universal discrete-variable quantum computation in a cavity-QED-based architecture, with potentially improved scalability. Our proposal hinges on a novel excitation blockade mechanism in a resonant interaction between a free-electron and a cavity polariton. This nonlinear interaction is faster by several orders of magnitude with respect to current photon-based cavity-QED gates, enjoys wide tunability and can demonstrate fidelities close to unity. Furthermore, our scheme is ubiquitous to any cavity nonlinearity, either due to light-matter coupling as in the Jaynes-Cummings model or due to photon-photon interactions as in a Kerr-type many-body system. In addition to promising advancements in cavity-QED quantum computation, our approach paves the way towards ultrafast and deterministic generation of highly-entangled photonic graph states and is applicable to other quantum technologies involving cavity-QED.

Related papers

• On-demand transposition across light-matter interaction regimes in bosonic cQED [69.65384453064829]
  Bosonic cQED employs the light field of high-Q superconducting cavities coupled to non-linear circuit elements. We present the first experiment to achieve fast switching of the interaction regime without deteriorating the cavity coherence. Our work opens up a new paradigm to probe the full range of light-matter interaction dynamics within a single platform.
  arXiv  Detail & Related papers  (2023-12-22T13:01:32Z)
• Simulating polaritonic ground states on noisy quantum devices [0.0]
  We introduce a general framework for simulating electron-photon coupled systems on small, noisy quantum devices. To achieve chemical accuracy, we exploit various symmetries in qubit reduction methods. We measure two properties: ground-state energy, fundamentally relevant to chemical reactivity, and photon number.
  arXiv  Detail & Related papers  (2023-10-03T14:45:54Z)
• Jaynes-Cummings interaction between low energy free-electrons and cavity photons [0.571097144710995]
  We propose a new approach to realize the Jaynes-Cummings Hamiltonian using low energy free-electrons coupled to dielectric microcavities. Our approach utilizes quantum recoil, which causes a large detuning that inhibits the emission of multiple consecutive photons. We show that this approach can be used for generation of single photons with unity efficiency and high fidelity.
  arXiv  Detail & Related papers  (2023-02-03T07:06:51Z)
• Cloaking a qubit in a cavity [36.136619420474766]
  Cavity quantum electrodynamics (QED) uses a cavity to engineer the mode structure of the vacuum electromagnetic field. Controllably decoupling a qubit from the cavity's photon population, effectively cloaking the qubit from the cavity. Experiment demonstrates how qubit cloaking can be exploited to cancel ac-Stark shift and measurement-induced dephasing.
  arXiv  Detail & Related papers  (2022-11-10T18:45:03Z)
• Many-body cavity quantum electrodynamics with driven inhomogeneous emitters [2.745127037087037]
  We study how a large, inhomogeneously broadened ensemble of solid-state emitters coupled with high cooperativity to a nanophotonic resonator behaves under strong excitation. We discover a sharp, collectively induced transparency (CIT) in the cavity reflection spectrum, resulting from quantum interference and collective response induced by the interplay between driven inhomogeneous emitters and cavity photons. These phenomena in the many-body cQED regime enable new mechanisms for achieving slow light and frequency referencing, pave a way towards solid-state superradiant lasers and inform the development of ensemble-based quantum interconnects.
  arXiv  Detail & Related papers  (2022-08-08T18:06:08Z)
• Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
  We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
  arXiv  Detail & Related papers  (2022-06-03T14:52:34Z)
• Topologically Protecting Squeezed Light on a Photonic Chip [58.71663911863411]
  Integrated photonics offers an elegant way to increase the nonlinearity by confining light strictly inside the waveguide. We experimentally demonstrate the topologically protected nonlinear process of spontaneous four-wave mixing enabling the generation of squeezed light on a silica chip.
  arXiv  Detail & Related papers  (2021-06-14T13:39:46Z)
• Hybrid quantum photonics based on artificial atoms placed inside one hole of a photonic crystal cavity [47.187609203210705]
  Hybrid quantum photonics with SiV$-$-containing nanodiamonds inside one hole of a one-dimensional, free-standing, Si$_3$N$_4$-based photonic crystal cavity is presented. The resulting photon flux is increased by more than a factor of 14 as compared to free-space. Results mark an important step to realize quantum network nodes based on hybrid quantum photonics with SiV$-$- center in nanodiamonds.
  arXiv  Detail & Related papers  (2020-12-21T17:22:25Z)
• Entanglement transfer, accumulation and retrieval via quantum-walk-based qubit-qudit dynamics [50.591267188664666]
  Generation and control of quantum correlations in high-dimensional systems is a major challenge in the present landscape of quantum technologies. We propose a protocol that is able to attain entangled states of $d$-dimensional systems through a quantum-walk-based it transfer & accumulate mechanism. In particular, we illustrate a possible photonic implementation where the information is encoded in the orbital angular momentum and polarization degrees of freedom of single photons.
  arXiv  Detail & Related papers  (2020-10-14T14:33:34Z)
• Electron shelving of a superconducting artificial atom [0.0]
  We demonstrate a conditional fluorescence readout of fluxonium qubit placed inside a matched one-dimensional waveguide. Cycling the non-computational transition between ground and third excited states produces a microwave photon every 91 ns conditioned on the qubit ground state. The readout has a built-in quantum non-demolition property, allowing over 100 fluorescence cycles in agreement with a four-level optical pumping model.
  arXiv  Detail & Related papers  (2020-08-06T01:50:09Z)
• Circuit Quantum Electrodynamics [62.997667081978825]
  Quantum mechanical effects at the macroscopic level were first explored in Josephson junction-based superconducting circuits in the 1980s. In the last twenty years, the emergence of quantum information science has intensified research toward using these circuits as qubits in quantum information processors. The field of circuit quantum electrodynamics (QED) has now become an independent and thriving field of research in its own right.
  arXiv  Detail & Related papers  (2020-05-26T12:47:38Z)

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.