Transformation of Bell states using linear optics

• URL: http://arxiv.org/abs/2306.04364v1
• Date: Wed, 7 Jun 2023 11:54:59 GMT
• Title: Transformation of Bell states using linear optics
• Authors: Sarika Mishra and R. P. Singh
• Abstract summary: Bell states form a complete set of four maximally polarization entangled two-qubit quantum state. Our results can be useful in many quantum applications, especially in superdense coding where control over basis of maximally entangled state is required.
• Score: 1.0152838128195467
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Bell states form a complete set of four maximally polarization entangled two-qubit quantum state. Being a key ingredient of many quantum applications such as entanglement based quantum key distribution protocols, superdense coding, quantum teleportation, entanglement swapping etc, Bell states have to be prepared and measured. Spontaneous parametric down conversion is the easiest way of preparing Bell states and a desired Bell state can be prepared from any entangled photon pair through single-qubit logic gates. In this paper, we present the generation of complete set of Bell states, only by using unitary transformations of half-wave plate (HWP). The initial entangled state is prepared using a combination of a nonlinear crystal and a beam-splitter (BS) and the rest of the Bell states are created by applying single-qubit logic gates on the entangled photon pairs using HWPs. Our results can be useful in many quantum applications, especially in superdense coding where control over basis of maximally entangled state is required.

Related papers

• Realizing fracton order from long-range quantum entanglement in programmable Rydberg atom arrays [45.19832622389592]
  Storing quantum information requires battling quantum decoherence, which results in a loss of information over time. To achieve error-resistant quantum memory, one would like to store the information in a quantum superposition of degenerate states engineered in such a way that local sources of noise cannot change one state into another. We show that this platform also allows to detect and correct certain types of errors en route to the goal of true error-resistant quantum memory.
  arXiv  Detail & Related papers  (2024-07-08T12:46:08Z)
• Fusion of deterministically generated photonic graph states [0.0]
  Entanglement has evolved from an enigmatic concept of quantum physics to a key ingredient of quantum technology. Here we achieve this goal by employing an optical resonator containing two atoms.
  arXiv  Detail & Related papers  (2024-03-18T16:46:00Z)
• Quantum process tomography of continuous-variable gates using coherent states [49.299443295581064]
  We demonstrate the use of coherent-state quantum process tomography (csQPT) for a bosonic-mode superconducting circuit. We show results for this method by characterizing a logical quantum gate constructed using displacement and SNAP operations on an encoded qubit.
  arXiv  Detail & Related papers  (2023-03-02T18:08:08Z)
• Full Bell-basis measurement of an atom-photon 2-qubit state and its application for quantum networks [0.0]
  We present the implementation of a protocol that allows us to distinguish all four Bell states by the use of a single-ion quantum memory. First we demonstrate the state-preserving mapping of a photonic qubit onto the quantum memory, verified by the preservation of entanglement. Then we demonstrate the full Bell state projection between a memory qubit and an incoming photonic qubit, by applying it for atom-to-photon quantum state teleportation.
  arXiv  Detail & Related papers  (2023-01-15T13:07:43Z)
• Steered discrete-time quantum walks for engineering of quantum states [0.0]
  We analyze the strengths and limitations of steered discrete time quantum walks in generating quantum states of bipartite quantum systems. We show that not all quantum states in the composite space are accessible through quantum walks, even under the most generalized definition of a quantum step.
  arXiv  Detail & Related papers  (2022-05-10T13:14:25Z)
• 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)
• Heterogeneous Multipartite Entanglement Purification for Size-Constrained Quantum Devices [68.8204255655161]
  Purifying entanglement resources after their imperfect generation is an indispensable step towards using them in quantum architectures. Here we depart from the typical purification paradigm for multipartite states explored in the last twenty years. We find that smaller sacrificial' states, like Bell pairs, can be more useful in the purification of multipartite states than additional copies of these same states.
  arXiv  Detail & Related papers  (2020-11-23T19:00:00Z)
• Entangled state generation via quantum walks with multiple coins [2.471925498075058]
  Entanglement swapping provides an efficient method to generate entanglement in quantum communication protocols. We propose a novel scheme to generate entangled state including two-qubit entangled state, two-qudit entangled state, three-qubit GHZ state and three-qudit GHZ state between several designate parties via the model of quantum walks with multiple coins.
  arXiv  Detail & Related papers  (2020-11-03T11:39:40Z)
• Coherent generation of the complete high-dimensional Bell basis by adaptive pump modulation [6.278767485837224]
  We show that the adaptive pump modulation enable the efficient preparation of Bell basis in arbitrary-dimensional Hilbert space. A complete set of four-dimensional orbital angular momentum Bell states are experimentally created, yielding high fidelities for certifying the entanglement dimensionality.
  arXiv  Detail & Related papers  (2020-05-31T06:21:40Z)
• Quantum Gram-Schmidt Processes and Their Application to Efficient State Read-out for Quantum Algorithms [87.04438831673063]
  We present an efficient read-out protocol that yields the classical vector form of the generated state. Our protocol suits the case that the output state lies in the row space of the input matrix. One of our technical tools is an efficient quantum algorithm for performing the Gram-Schmidt orthonormal procedure.
  arXiv  Detail & Related papers  (2020-04-14T11:05:26Z)
• Quantum teleportation with hybrid entangled resources prepared from heralded quantum states [68.8204255655161]
  We propose the generation of a hybrid entangled resource (HER) The work includes a discussion about the fidelity dependence on the geometrical properties of the medium through which the HER is generated. No spectral filtering is employed in the heralding process, which emphasizes the feasibility of this scheme without compromising photon flux.
  arXiv  Detail & Related papers  (2020-02-07T21:20:50Z)

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.