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pro vyhledávání: '"Chandrashekar C"'
Restart is a common strategy observed in nature that accelerates first-passage processes and has been extensively studied using classical random walks. In the quantum regime, restart in continuous-time quantum walks (CTQWs) has been shown to expedite
Externí odkaz:
http://arxiv.org/abs/2411.09477
Autor:
Nai, Ayan Kumar, Sharma, Amritash, Kumar, Vimlesh, Singh, Sandeep, Mishra, Shreya, Chandrashekar, C. M., Samanta, G. K.
The spontaneous parametric down-conversion (SPDC), an inherently random quantum process, produces a non-deterministic photon-pair with strong temporal and spatial correlations owing to both energy and momentum conservation. Therefore, the SPDC-based
Externí odkaz:
http://arxiv.org/abs/2410.00440
Publikováno v:
Phys. Rev. A 110,032615 (2024)
We theoretically propose and experimentally demonstrate the use of a configurable four-qubit photonic system to generate a publicly verifiable quantum random numbers, to perform entanglement verification, and to generate secure public and private key
Externí odkaz:
http://arxiv.org/abs/2406.07156
Controlled quantum walk forms the basis for various quantum algorithm and quantum simulation schemes. Though theoretical proposals are also available to realize universal quantum computation using quantum walks, no experimental demonstration of unive
Externí odkaz:
http://arxiv.org/abs/2403.06665
Publikováno v:
Optics Express Vol. 32, Issue 23, pp. 40150-40164 (2024)
Entangled light sources for illuminating objects offer advantages over conventional illumination methods by enhancing the detection sensitivity of reflecting objects. The core of the quantum advantage lies in effectively exploiting quantum correlatio
Externí odkaz:
http://arxiv.org/abs/2401.10182
Autor:
Shukla, Kunal, Chandrashekar, C. M.
Publikováno v:
Phys. Rev. A **109**, 032608 (2024)
Quantum magnetometry uses quantum resources to measure magnetic fields with precision and accuracy that cannot be achieved by its classical counterparts. In this paper, we propose a scheme for quantum magnetometry using discrete-time quantum walk (DT
Externí odkaz:
http://arxiv.org/abs/2311.15801
Evolutions under non-Hermitian Hamiltonians with unbroken PT-symmetry can be considered unitary under appropriate choices of inner products, facilitated by the so-called metric operator. While it is understood that the choice of the metric operator h
Externí odkaz:
http://arxiv.org/abs/2309.03042
Autor:
Sahu, Himanshu, Chandrashekar, C. M.
Publikováno v:
Quantum Information Processing 23, 7 (2024)
Quantum simulation provides a computationally-feasible approach to model and study many problems in chemistry, condensed-matter physics, or high-energy physics where quantum phenomenon define the systems behaviour. In high-energy physics, quite a few
Externí odkaz:
http://arxiv.org/abs/2305.13923
Publikováno v:
Optics Express 31 (20), 32093 - 32104 (2023)
Detecting object with low reflectivity embedded within a noisy background is a challenging task. Quantum correlations between pairs of quantum states of light, though are highly sensitive to background noise and losses, offer advantages over traditio
Externí odkaz:
http://arxiv.org/abs/2303.05218
Publikováno v:
Physica Scripta 98(10), 105113 (2023)
The utilization of quantum entanglement as a cryptographic resource has superseded conventional approaches to secure communication. Security and fidelity of intranetwork communication between quantum devices is the backbone of a quantum network. This
Externí odkaz:
http://arxiv.org/abs/2211.12938