A direct interferometric test of the nonlinear phase shift gate

• URL: http://arxiv.org/abs/2008.04075v1
• Date: Mon, 10 Aug 2020 12:48:53 GMT
• Title: A direct interferometric test of the nonlinear phase shift gate
• Authors: Peter L. Kaulfuss, Paul M. Alsing, Edwin E. Hach, III., A. Matthew Smith and Michael L. Fanto
• Abstract summary: We develop our analysis for the case of the original, bulk optical KLM NLPSG and for the scalable integrated nano-photonic NLPSG based on Micro-Ring Resonators (MRRs) We examine the triple coincidence results for experimentally realistic cases of click/no-click detection with sub-unity detection efficiencies. In particular, we show that, though more difficult to prepare, cl-SPDC states offer clear advantages for performing the test, especially in the case of relatively low photon detector efficiency.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We propose a direct interferometric test of the Non-Linear Phase Shift Gate (NLPSG), an essential piece of a Knill Laflamme Milburn Contolled-NOT (KLM CNOT) gate. We develop our analysis for the both the case of the original, bulk optical KLM NLPSG and for the scalable integrated nano-photonic NLPSG based on Micro-Ring Resonators (MRRs) that we have proposed very recently. Specifically, we consider the interference between the target photon mode of the NLPSG along one arm of a Mach Zehnder Interferometer (MZI) and a mode subject to an adjustable linear phase along the other arm. Analysis of triple-photon coincidences between the two modes at the output of the MZI and the success ancillary mode of the NLPSG provides a signature of the operation of the NLPSG. We examine the triple coincidence results for experimentally realistic cases of click/no-click detection with sub-unity detection efficiencies. Further we compare the case for which the MZI input modes are seeded with weak Coherent States (w-CS) and to that for which the input states are those resulting from colinear Spontaneous Parametric Down Conversion (cl-SPDC). In particular, we show that, though more difficult to prepare, cl-SPDC states offer clear advantages for performing the test, especially in the case of relatively low photon detector efficiency.

Related papers

• Comparing the performance of practical two-qubit gates for individual ${}^{171}$Yb ions in yttrium orthovanadate [0.0]
  We investigate three schemes for implementing Controlled-NOT (CNOT) gates between individual ytterbium (Yb) rare-earth ions. We compute the gate fidelity of each scheme to evaluate the feasibility of their experimental implementation. We conclude that the probabilistic photon interference-based scheme offers the best fidelity scaling with cooperativity.
  arXiv  Detail & Related papers  (2024-10-31T03:55:08Z)
• Enhancing phase sensitivity in Mach-Zehnder interferometer with various detection schemes using SU(1,1) coherent states [0.0]
  The Mach-Zehnder interferometer (MZI) is a versatile tool for analyzing this phenomenon. This paper analyzes the phase sensitivity of a MZI in various scenarios using different detection schemes and input states.
  arXiv  Detail & Related papers  (2024-06-12T08:54:17Z)
• Enhanced Whispering Gallery Mode Phase Shift using Indistinguishable Photon Pairs [0.0]
  We show a bimodal coincidence transmission spectrum when the input state is an indistinguishable photon pair. This is due to the doubled WGM phase shift experienced by the path-entangled state in the interferometer. At least a four-fold improvement in the signal-to-noise ratio is possible, with clear implications for quantum-enhanced WGM sensing.
  arXiv  Detail & Related papers  (2024-04-26T13:38:18Z)
• Design and simulation of a transmon qubit chip for Axion detection [103.69390312201169]
  Device based on superconducting qubits has been successfully applied in detecting few-GHz single photons via Quantum Non-Demolition measurement (QND) In this study, we present Qub-IT's status towards the realization of its first superconducting qubit device.
  arXiv  Detail & Related papers  (2023-10-08T17:11:42Z)
• Finite Pulse-Time Effects in Long-Baseline Quantum Clock Interferometry [45.73541813564926]
  We study the interplay of the quantum center-of-mass $-$ that can become delocalized $-$ together with the internal clock transitions. We show at the example of a Gaussian laser beam that the proposed quantum-clock interferometers are stable against perturbations from varying optical fields.
  arXiv  Detail & Related papers  (2023-09-25T18:00:03Z)
• High-dimensional quantum correlation measurements with an adaptively gated hybrid single-photon camera [58.720142291102135]
  We propose an adaptively-gated hybrid intensified camera (HIC) that combines a high spatial resolution sensor and a high temporal resolution detector. With a spatial resolution of nearly 9 megapixels and nanosecond temporal resolution, this system allows for the realization of previously infeasible quantum optics experiments.
  arXiv  Detail & Related papers  (2023-05-25T16:59:27Z)
• Noise-resilient Edge Modes on a Chain of Superconducting Qubits [103.93329374521808]
  Inherent symmetry of a quantum system may protect its otherwise fragile states. We implement the one-dimensional kicked Ising model which exhibits non-local Majorana edge modes (MEMs) with $mathbbZ$ parity symmetry. MEMs are found to be resilient against certain symmetry-breaking noise owing to a prethermalization mechanism.
  arXiv  Detail & Related papers  (2022-04-24T22:34:15Z)
• General Hamiltonian Representation of ML Detection Relying on the Quantum Approximate Optimization Algorithm [74.6114458993128]
  The quantum approximate optimization algorithm (QAOA) conceived for solving optimization problems can be run on the existing noisy intermediate-scale quantum (NISQ) devices. We solve the maximum likelihood (ML) detection problem for general constellations by appropriately adapting the QAOA. In particular, for an M-ary Gray-mapped quadrature amplitude modulation (MQAM) constellation, we show that the specific qubits encoding the in-phase components and those encoding the quadrature components are independent in the quantum system of interest.
  arXiv  Detail & Related papers  (2022-04-11T14:11:24Z)
• Spectrally multimode integrated SU(1,1) interferometer [50.591267188664666]
  The presented interferometer includes a polarization converter between two photon sources and utilizes a continuous-wave (CW) pump. We show that this configuration results in almost perfect destructive interference at the output and supersensitivity regions below the classical limit.
  arXiv  Detail & Related papers  (2020-12-07T14:42:54Z)
• Improving phase estimation using the number-conserving operations [8.123933627777628]
  We propose a theoretical scheme to improve the resolution and precision of phase measurement with parity detection in the Mach-Zehnder interferometer. The nonclassical properties of the proposed GSP-TMSV are investigated via average photon number (APN), anti-bunching effect, and degrees of two-mode squeezing.
  arXiv  Detail & Related papers  (2020-12-04T07:47:02Z)
• Nonlinear phase estimation enhanced by an actively correlated Mach-Zehnder interferometer [0.4893345190925178]
  A nonlinear phase shift is introduced to a Mach-Zehnder interferometer (MZI) We present a scheme for enhancing the phase sensitivity. Based on the optimal splitting ratio of beam splitters, the phase sensitivity can beat the standard quantum limit.
  arXiv  Detail & Related papers  (2020-09-17T04:36:00Z)

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.