Quantifying quantum coherence of optical cat states

• URL: http://arxiv.org/abs/2104.13833v1
• Date: Wed, 28 Apr 2021 15:37:54 GMT
• Title: Quantifying quantum coherence of optical cat states
• Authors: Miao Zhang, Haijun Kang, Meihong Wang, Fengyi Xu, Xiaolong Su, and Kunchi Peng
• Abstract summary: We experimentally quantify quantum coherence of an optical cat state based on the prepared optical cat state at rubidium D1 line. Our results confirm that quantum coherence of optical cat states is robust against loss and pave the way for the application with optical cat states.
• Score: 16.155892979947115
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Optical cat state plays an essential role in quantum computation and quantum metrology. Here, we experimentally quantify quantum coherence of an optical cat state by means of relative entropy and l_1 norm of coherence in Fock basis based on the prepared optical cat state at rubidium D1 line. By transmitting the optical cat state through a lossy channel, we also demonstrate the robustness of quantum coherence of optical cat state in the presence of loss, which is different from the decoherence properties of fidelity and Wigner function negativity of the optical cat state. Our results confirm that quantum coherence of optical cat states is robust against loss and pave the way for the application with optical cat states.

Related papers

• Creation and manipulation of Schrödinger cat states of a nuclear spin qudit in silicon [28.4073170440133]
  We show the creation and manipulation of Schr"odinger cat states using the spin-7/2 nucleus of a single antimony atom. Results demonstrate high-fidelity preparation of nonclassical resource states and logical control in a single atomic-scale object.
  arXiv  Detail & Related papers  (2024-05-24T12:22:16Z)
• The formation of Schrodinger cat-like states in the process of spontaneous parametric down-conversion [50.161078038675285]
  We show the formation of Schrodinger cat-like states during the spontaneous parametric down-conversion process (SPDC) For the first time, we show the formation of the Schrodinger cat-like states in the fundamental and second harmonic modes under non-dissipative and dissipative regimes.
  arXiv  Detail & Related papers  (2024-05-23T13:11:07Z)
• On-chip quantum interference between independent lithium niobate-on-insulator photon-pair sources [35.310629519009204]
  A lithium niobate-on-insulator (LNOI) integrated photonic circuit generates a two-photon path-entangled state, and a programmable interferometer for quantum interference. We generate entangled photons with $sim2.3times108$ pairs/s/mW brightness and perform quantum interference experiments on the chip with $96.8pm3.6%$ visibility. Our results provide a path towards large-scale integrated quantum photonics including efficient photon-pair generation and programmable circuits for applications such as boson sampling and quantum communications.
  arXiv  Detail & Related papers  (2024-04-12T10:24:43Z)
• Metrological robustness of high photon number optical cat states [0.0]
  We introduce noise robust optical cat states which exhibit a metrological robustness for phase estimation in the regime of high photon numbers. These cat states are obtained from the intense laser driven process of high harmonic generation. We show that the decrease of the QFI in the lossy case is suppressed for the HHG-cat state compared to the even and odd counterparts.
  arXiv  Detail & Related papers  (2023-11-02T16:28:41Z)
• Simultaneous preparation of two optical cat states based on a nondegenerate optical parametric amplifier [1.9594274388434523]
  We prepare two optical cat states simultaneously based on a nondegenerate optical parametric amplifier. By subtracting one photon from each of two squeezed vacuum states, two odd cat states with superposition direction in phase space are prepared simultaneously. Results make a step toward preparing the four-component cat state, which has potential applications in fault-tolerant quantum cavities.
  arXiv  Detail & Related papers  (2023-05-15T08:09:51Z)
• Method to deterministically generate large-amplitude optical cat states [1.146825766525396]
  Cat states are an important resource in the study of macroscopic quantum superposition and quantum information applications. We demonstrate that, by utilizing interaction-free measurement and the quantum Zeno effect, even a fragile quantum microscopic system can deterministically control and become entangled with strong light fields. We show that the preparation of cat states is possible even when the quantum microsystem suffers from significant photon loss.
  arXiv  Detail & Related papers  (2023-01-07T12:38:47Z)
• 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)
• Protecting the quantum interference of cat states by phase-space compression [45.82374977939355]
  Cat states with their unique phase-space interference properties are ideal candidates for understanding quantum mechanics. They are highly susceptible to photon loss, which inevitably diminishes their quantum non-Gaussian features. Here, we protect these non-Gaussian features by compressing the phase-space distribution of a cat state.
  arXiv  Detail & Related papers  (2022-12-02T16:06:40Z)
• Experimental preparation of generalized cat states for itinerant microwave photons [6.219063677193734]
  We demonstrate a versatile approach to creating generalized itinerant cat states in the microwave domain. We show that, with a coherent control of the qubit state, a full control over the coherent state superposition can be realized.
  arXiv  Detail & Related papers  (2022-07-11T04:33:32Z)
• Optimal quantum phase estimation with generalized multi-component Schrodinger cat states [0.0]
  We investigate the optimal quantum phase estimation with generalized multi-component Schrodinger cat states. We show that the generalized multi-component cat states can beat the performances of the NOON and two-mode squeezed vacuum states in the presence of small loss. We propose a generation scheme of the entangled multi-component cat states with current or near-term optical technologies.
  arXiv  Detail & Related papers  (2020-03-13T13:53:55Z)

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.