Equally entangled multiqubit states

• URL: http://arxiv.org/abs/2508.20770v1
• Date: Thu, 28 Aug 2025 13:26:13 GMT
• Title: Equally entangled multiqubit states
• Authors: Francisco Albarrán-Arriagada, Guillermo Romero, Juan Carlos Retamal,
• Abstract summary: We present a protocol for generating multiqubit quantum states with translationally invariant pairwise entanglement.<n>Our approach is tailored for digital quantum computers with restricted qubit connectivity.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a protocol for generating multiqubit quantum states with translationally invariant pairwise entanglement. Our approach is tailored for digital quantum computers with restricted qubit connectivity, a common limitation in state-of-the-art hardware platforms. We examine two configurations: star connectivity, which enables rotationally invariant entanglement, and linear connectivity, which achieves translationally invariant entanglement. For the linear configuration, we use a variant of the time-dependent density matrix renormalization group (tDMRG) algorithm to demonstrate that our protocol is independent of the qubits' number. A slight modification of the protocol reveals the presence of quantum states that exhibit periodicity of entanglement among nearest-neighbor qubits. The configurations and protocols of this work are well-suited for near-term quantum devices, offering a feasible route for the experimental realization of symmetric entangled states.

Related papers

• Deterministic generation of multi-qubit entangled states among distant parties using indefinite causal order [1.556591713973462]
  We present protocols for generating $N$-qubit entangled states across multiple network nodes.<n>The results indicate that our protocols significantly improve the efficiency of long-distance entanglement generation.
  arXiv  Detail & Related papers  (2025-03-05T11:40:19Z)
• Quantum Homogenization as a Quantum Steady State Protocol on NISQ Hardware [42.52549987351643]
  Quantum homogenization is a reservoir-based quantum state approximation protocol.<n>We extend the standard quantum homogenization protocol to the dynamically-equivalent ($mathttSWAP$)$alpha$ formulation.<n>We show that our proposed protocol yields a completely positive, trace preserving (CPTP) map under which the code subspace is correctable.
  arXiv  Detail & Related papers  (2024-12-19T05:50:54Z)
• Deterministic multipartite entanglement via fractional state transfer across quantum networks [0.0]
  We propose a fractional quantum state transfer, in which the excitation of an emitter is partially transmitted through the quantum communication channel. We show that genuine multipartite entangled states can be faithfully prepared within current experimental platforms.
  arXiv  Detail & Related papers  (2024-08-02T10:59:16Z)
• Reinforcement Learning to Disentangle Multiqubit Quantum States from Partial Observations [0.0]
  We present a deep reinforcement learning approach to constructing short disentangling circuits for arbitrary 4-, 5-, and 6-qubit states. We demonstrate the agent's ability to identify and exploit the entanglement structure of multiqubit states. We report a general circuit to prepare an arbitrary 4-qubit state using at most 5 two-qubit (10 CNOT) gates.
  arXiv  Detail & Related papers  (2024-06-12T05:23:08Z)
• Multipartite entanglement theory with entanglement-nonincreasing operations [55.2480439325792]
  We extend the resource theory of entanglement for multipartite systems beyond the standard framework of local operations and classical communication.<n>We demonstrate that in this adjusted framework, the transformation rates between multipartite states are fundamentally dictated by the bipartite entanglement entropies of the respective quantum states.
  arXiv  Detail & Related papers  (2023-05-30T12:53:56Z)
• Graph test of controllability in qubit arrays: A systematic way to determine the minimum number of external controls [62.997667081978825]
  We show how to leverage an alternative approach, based on a graph representation of the Hamiltonian, to determine controllability of arrays of coupled qubits. We find that the number of controls can be reduced from five to one for complex qubit-qubit couplings.
  arXiv  Detail & Related papers  (2022-12-09T12:59:44Z)
• A universal time-dependent control scheme for realizing arbitrary bosonic unitaries [0.0]
  We study the implementation of arbitrary unitary transformations between two sets of $N$ stationary bosonic modes. By controlling the individual couplings between the modes and the channel, an initial $N$-partite quantum state in register A can be released as a multi-photon wavepacket.
  arXiv  Detail & Related papers  (2022-09-20T00:41:44Z)
• 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)
• Interactive Protocols for Classically-Verifiable Quantum Advantage [46.093185827838035]
  "Interactions" between a prover and a verifier can bridge the gap between verifiability and implementation. We demonstrate the first implementation of an interactive quantum advantage protocol, using an ion trap quantum computer.
  arXiv  Detail & Related papers  (2021-12-09T19:00:00Z)
• A quantum processor based on coherent transport of entangled atom arrays [44.62475518267084]
  We show a quantum processor with dynamic, nonlocal connectivity, in which entangled qubits are coherently transported in a highly parallel manner. We use this architecture to realize programmable generation of entangled graph states such as cluster states and a 7-qubit Steane code state.
  arXiv  Detail & Related papers  (2021-12-07T19:00:00Z)
• Universal unitary transfer of continuous-variable quantum states into a few qubits [0.0]
  We present a protocol for transferring arbitrary continuous-variable quantum states into a few discrete-variable qubits and back. The protocol is deterministic and utilizes only two-mode Rabi-type interactions.
  arXiv  Detail & Related papers  (2021-06-23T09:50:13Z)

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.