Refined quantum gates for $\Lambda$-type atom-photon hybrid systems

• URL: http://arxiv.org/abs/2210.10597v1
• Date: Wed, 19 Oct 2022 14:42:09 GMT
• Title: Refined quantum gates for $\Lambda$-type atom-photon hybrid systems
• Authors: Yi-Ming Wu, Gang Fan and Fang-Fang Du
• Abstract summary: We present protocols for realizing controlled-not (CNOT), Fredkin, and Toffoli gates on hybrid systems. The first control qubit of our gates is encoded on a flying photon, and the rest qubits are encoded on the atoms in optical cavity. These quantum gates can be extended to the optimal synthesis of multi-qubit CNOT, Fredkin and Toffoli gates.
• Score: 3.1273732288852716
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: High-efficiency quantum information processing is equivalent to the fewest quantum resources and the simplest operations by means of logic qubit gates. Based on the reflection geometry of a single photon interacting with a three-level $\Lambda$-typle atom-cavity system, we present some refined protocols for realizing controlled-not (CNOT), Fredkin, and Toffoli gates on hybrid systems. The first control qubit of our gates is encoded on a flying photon, and the rest qubits are encoded on the atoms in optical cavity. Moreover, these quantum gates can be extended to the optimal synthesis of multi-qubit CNOT, Fredkin and Toffoli gates with O(n) optical elements without auxiliary photons or atoms. Further, the simplest single-qubit operations are applied to the photon only, which make these logic gates experimentally feasible with current technology.

Related papers

• Heralded High-Dimensional Photon-Photon Quantum Gate [4.602787223342753]
  A major obstacle for realizing quantum gates between two individual photons is the restriction of direct interaction between photons in linear media. We present a protocol for realizing an entangling gate -- the controlled phase-flip (CPF) gate -- for two photonic qudits in arbitrary dimension. We experimentally demonstrate this protocol by realizing a four-dimensional qudit-qudit CPF gate, whose decomposition would require at least 13 two-qubit entangling gates.
  arXiv  Detail & Related papers  (2024-07-23T10:00:12Z)
• Optical single-shot readout of spin qubits in silicon [41.94295877935867]
  silicon nanofabrication offers unique advantages for integration and up-scaling. Small spin-qubit registers have exceeded error-correction thresholds, their connection to large quantum computers is an outstanding challenge. We implement such an efficient spin-photon interface based on erbium dopants in a nanophotonic resonator.
  arXiv  Detail & Related papers  (2024-05-08T18:30:21Z)
• Subtraction and Addition of Propagating Photons by Two-Level Emitters [2.321156230142032]
  We show that a passive two-level nonlinearity suffices to implement non-Gaussian quantum operations on propagating field modes. We accurately describe the single-photon subtraction process by elements of an intuitive quantum-trajectory model.
  arXiv  Detail & Related papers  (2024-04-18T16:55:33Z)
• Universal quantum computation using atoms in cross-cavity systems [0.0]
  We theoretically investigate a single-step implementation of both a universal two- (CNOT) and three-qubit (quantum Fredkin) gates in a cross-cavity setup. Within a high-cooper regime, the system exhibits an atomic-state-dependent $pi$-phase gate involving the two-mode single-photon bright and dark states.
  arXiv  Detail & Related papers  (2023-08-28T20:09:54Z)
• QUICK$^3$ -- Design of a satellite-based quantum light source for quantum communication and extended physical theory tests in space [73.86330563258117]
  Single photon source can enhance secure data rates in satellite-based quantum key distribution scenarios. payload is being integrated into a 3U CubeSat and scheduled for launch in 2024 into low Earth orbit.
  arXiv  Detail & Related papers  (2023-01-26T15:34:11Z)
• Experimental realization of deterministic and selective photon addition in a bosonic mode assisted by an ancillary qubit [50.591267188664666]
  Bosonic quantum error correcting codes are primarily designed to protect against single-photon loss. Error correction requires a recovery operation that maps the error states -- which have opposite parity -- back onto the code states. Here, we realize a collection of photon-number-selective, simultaneous photon addition operations on a bosonic mode.
  arXiv  Detail & Related papers  (2022-12-22T23:32:21Z)
• Integrated Quantum Optical Phase Sensor [48.7576911714538]
  We present a photonic integrated circuit fabricated in thin-film lithium niobate. We use the second-order nonlinearity to produce a squeezed state at the same frequency as the pump light and realize circuit control and sensing with electro-optics. We anticipate that on-chip photonic systems like this, which operate with low power and integrate all of the needed functionality on a single die, will open new opportunities for quantum optical sensing.
  arXiv  Detail & Related papers  (2022-12-19T18:46:33Z)
• All-optical quantum computing using cubic phase gates [0.0]
  We show how elements of all-optical, universal, and fault-tolerant quantum computation can be implemented. Our approach is based on a decomposition technique combining exact gate decompositions and approximate Trotterization.
  arXiv  Detail & Related papers  (2022-11-16T17:21:30Z)
• 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)
• Universal quantum multi-qubit entangling gates with auxiliary spaces [0.0]
  We present an effective quantum circuit for the implementation of a controlled-NOT (CNOT) gate. The method is extended to the construction of a general n-control-qubit Toffoli gate with (2n-1) qubit-qudit gates and (2n-2) single-qudit gates. Based on the presented quantum circuits, the polarization CNOT and Toffoli gates with linear optics are designed by operating on the spatial-mode degree of freedom of photons.
  arXiv  Detail & Related papers  (2021-05-22T03:30:22Z)
• A bright and fast source of coherent single photons [46.25143811066789]
  A single photon source is a key enabling technology in device-independent quantum communication. We report a single photon source with an especially high system efficiency.
  arXiv  Detail & Related papers  (2020-07-24T17:08:46Z)

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.