Parallel two-qubit entangling gates via a quantum nondemolition interaction controlled by rotation

• URL: http://arxiv.org/abs/2405.08141v3
• Date: Tue, 15 Oct 2024 21:28:12 GMT
• Title: Parallel two-qubit entangling gates via a quantum nondemolition interaction controlled by rotation
• Authors: E. A. Vashukevich, T. Yu. Golubeva,
• Abstract summary: The paper presents an analysis of entangling and nonlocal operations in a quantum nondemolition (QND) interaction between multimode light with orbital angular momentum and an atomic ensemble. A protocol consists of two QND operations with rotations of quadratures of atomic spin coherence and light between them.
• Score: 0.0
• License:
• Abstract: The paper presents an analysis of entangling and nonlocal operations in a quantum nondemolition (QND) interaction between multimode light with orbital angular momentum and an atomic ensemble. A protocol consists of two QND operations with rotations of quadratures of atomic spin coherence and light between them. This protocol provides a wide range of two-qubit operations, while the multimode nature of the chosen degrees of freedom allows the implementation of parallel operations over multiple two-qubit systems. We have used the formalism of equivalence classes and local invariants to evaluate the properties of two-qubit transformations. It is shown that, when selecting suitable values of the governing parameters, such as the duration of each of the two QND interactions and the rotation angles of the qubits, the protocol allows to realize a deterministic nonlocal $SWAP$ operation and entangling $\sqrt{SWAP}$ operation with probability 1/3.

Related papers

• Multi-frequency control and measurement of a spin-7/2 system encoded in a transmon qudit [8.435584530569509]
  We employ simultaneous multi-frequency drives to generate rotations and projections in an effective spin-7/2 system. By combining the displacement operator with a virtual SNAP gate, we realize arbitrary single-qudit unitary operations in O(d) physical pulses. These native qudit operations could be combined with entangling operations to explore qudit-based error correction or simulations of lattice gauge theories with qudits.
  arXiv  Detail & Related papers  (2024-05-24T18:00:28Z)
• A diverse set of two-qubit gates for spin qubits in semiconductor quantum dots [5.228819198411081]
  We propose and verify a fast composite two-qubit gate scheme to extend the available two-qubit gate types. Our gate scheme limits the parameter requirements of all essential two-qubit gates to a common JDeltaE_Z region. With this versatile composite gate scheme, broad-spectrum two-qubit operations allow us to efficiently utilize the hardware and the underlying physics resources.
  arXiv  Detail & Related papers  (2024-04-29T13:37:43Z)
• Generation of C-NOT, SWAP, and C-Z Gates for Two Qubits Using Coherent and Incoherent Controls and Stochastic Optimization [56.47577824219207]
  We consider a general form of the dynamics of open quantum systems determined by the Gorini-Kossakowsky-Sudarchhan-Lindblad type master equation. We analyze the control problems of generating two-qubit C-NOT, SWAP, and C-Z gates using piecewise constant controls and optimization.
  arXiv  Detail & Related papers  (2023-12-09T17:55:47Z)
• Parallel multi-two-qubit SWAP gate via QND interaction of OAM light and atomic ensemble [0.0]
  We propose a scheme for performing a SWAP logic operation in discrete variables. We also demonstrate the possibility of implementing a parallel multi-two-qubit quantum SWAP gate.
  arXiv  Detail & Related papers  (2023-06-28T21:13:08Z)
• Optimal State Manipulation for a Two-Qubit System Driven by Coherent and Incoherent Controls [77.34726150561087]
  State preparation is important for optimal control of two-qubit quantum systems. We exploit two physically different coherent control and optimize the Hilbert-Schmidt target density matrices.
  arXiv  Detail & Related papers  (2023-04-03T10:22:35Z)
• Spreading entanglement through pairwise exchange interactions [0.0]
  We consider the task of spreading one excitation among $N$ two-level atoms or qubits. We describe three protocols that accomplish this task.
  arXiv  Detail & Related papers  (2023-03-17T18:19:22Z)
• Quantum Gate Generation in Two-Level Open Quantum Systems by Coherent and Incoherent Photons Found with Gradient Search [77.34726150561087]
  We consider an environment formed by incoherent photons as a resource for controlling open quantum systems via an incoherent control. We exploit a coherent control in the Hamiltonian and an incoherent control in the dissipator which induces the time-dependent decoherence rates.
  arXiv  Detail & Related papers  (2023-02-28T07:36:02Z)
• Efficient Bipartite Entanglement Detection Scheme with a Quantum Adversarial Solver [89.80359585967642]
  Proposal reformulates the bipartite entanglement detection as a two-player zero-sum game completed by parameterized quantum circuits. We experimentally implement our protocol on a linear optical network and exhibit its effectiveness to accomplish the bipartite entanglement detection for 5-qubit quantum pure states and 2-qubit quantum mixed states.
  arXiv  Detail & Related papers  (2022-03-15T09:46:45Z)
• Neural-Network Quantum States for Periodic Systems in Continuous Space [66.03977113919439]
  We introduce a family of neural quantum states for the simulation of strongly interacting systems in the presence of periodicity. For one-dimensional systems we find very precise estimations of the ground-state energies and the radial distribution functions of the particles. In two dimensions we obtain good estimations of the ground-state energies, comparable to results obtained from more conventional methods.
  arXiv  Detail & Related papers  (2021-12-22T15:27:30Z)
• Superposition of two-mode squeezed states for quantum information processing and quantum sensing [55.41644538483948]
  We investigate superpositions of two-mode squeezed states (TMSSs) TMSSs have potential applications to quantum information processing and quantum sensing.
  arXiv  Detail & Related papers  (2021-02-01T18:09:01Z)
• Parallel entangling gate operations and two-way quantum communication in spin chains [0.0]
  We propose a protocol to parallelize the implementation of two-qubit entangling gates. The proposed protocol can serve for realizing two-way quantum communication.
  arXiv  Detail & Related papers  (2020-08-28T17:50:38Z)

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.