Parity-detection-based Mach-Zehnder interferometry with coherent and non-Gaussian squeezed vacuum states as inputs

Kumar, C. S. Sudheer; Rishabh, None; Sharma, Mohak; Arora, Shikhar

doi:10.1103/physreva.108.012605

Cited by 5 publications

(1 citation statement)

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“…With respect to the photon addition, many new states have been introduced, such as the photon-added two-mode coherent state [13], the photon-added pair coherent state [14], the photon-added two-mode displaced-squeezed state [15], the photon-added two-mode squeezed vacuum states (PATMSVSs) [16], the photon-added trio coherent state [17], and so on (see additional Refs. [18,19,20,21]). Studies have shown that these new states have many enhanced quantum properties compared to the original states, for example, the negativity of Wigner function, squeezing, and entanglement.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of teleportation average fidelity via photon addition operation

Minh Duc,

Quang Dat

2024

J. Phys.: Conf. Ser.

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In this paper, using the linear entropy criterion to quantify the degree of entanglement, we demonstrate that the addition of photons can enhance the entanglement degree of the photon-added two-mode squeezed vacuum states (PATMSVSs). Besides, the entanglement degree can approach ideal in case of squeezing parameter or number of added photons is high. When using PATMSVSs as entanglement resources to teleport a coherent state via a canonical protocol, the results show that the average fidelity of the quantum teleportation process is enhanced by the photon addition operation. The average fidelity increases as the number of photons added to the two-mode increases. In addition, we show that an enhancement in average fidelity can also be achieved by increasing the squeezing parameter of the TMSVS.

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Section: Introductionmentioning

confidence: 99%

Enhancement of teleportation average fidelity via photon addition operation

Minh Duc,

Quang Dat

2024

J. Phys.: Conf. Ser.

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Continuous Variable Quantum Teleportation in a Dissipative Environment: Comparison of Non‐Gaussian Operations Before and After Noisy Channel

Kumar,

Sharma,

Arora

2024

Adv Quantum Tech

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This article explores the relative advantages in continuous‐variable quantum teleportation when non‐Gaussian operations, namely, photon subtraction, addition, and catalysis, are performed before and after interaction with a noisy channel. The resource state for teleporting unknown coherent and squeezed vacuum states is generated using two distinct strategies: i) Implementation of non‐Gaussian operations on two mode squeezed vacuum (TMSV) state before interaction with a noisy channel, ii) Implementation of non‐Gaussian operations after interaction of TMSV state with a noisy channel. The results show that non‐Gaussian operations can enhance teleportation fidelity in a dissipative environment. However, the most advantageous non‐Gaussian operation and appropriate strategy depend on the state and channel parameters. The results suggest that employing such strategies can be advantageous in other non‐Gaussian continuous variable quantum information (QIP) processing tasks in a dissipative environment.

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Advantage of Non‐Gaussian Operations in Phase Estimation via Mach–Zehnder Interferometer

Verma,

Kumar,

Mishra

et al. 2024

Adv Quantum Tech

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This study investigates the benefits of probabilistic non‐Gaussian operations in phase estimation using difference‐intensity and parity detection‐based Mach–Zehnder interferometers (MZI). An experimentally implementable model is considered to perform three different non‐Gaussian operations, namely photon subtraction (PS), photon addition (PA), and photon catalysis (PC) on a single‐mode squeezed vacuum (SSV) state. The findings reveal that all non‐Gaussian operations except one PC operation provide an advantage in either of the measurement schemes. This result is further supported by the analysis of the quantum Cramér–Rao bound. When accounting for the success probability of non‐Gaussian operations, two‐PC and four‐PA emerges as the most optimal operations in difference‐intensity and parity detection‐based MZI, respectively. Additionally, the corresponding squeezing and transmissivity parameters that yields the best performance are identified, making the study relevant for experimentalists. Furthermore, a general expression for the moment‐generating function is derived, which is useful in exploring other detection schemes such as homodyne detection and quadratic homodyne detection.

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Parity-detection-based Mach-Zehnder interferometry with coherent and non-Gaussian squeezed vacuum states as inputs

Cited by 5 publications

References 50 publications

Enhancement of teleportation average fidelity via photon addition operation

Enhancement of teleportation average fidelity via photon addition operation

Continuous Variable Quantum Teleportation in a Dissipative Environment: Comparison of Non‐Gaussian Operations Before and After Noisy Channel

Advantage of Non‐Gaussian Operations in Phase Estimation via Mach–Zehnder Interferometer

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