Zobrazeno 1 - 10
of 419
pro vyhledávání: '"Pati, Arun"'
Publikováno v:
Europhysics Letters 146, 60001 (2024)
Given the initial and final states of a quantum system, the speed of transportation of state vector in the projective Hilbert space governs the quantum speed limit. Here, we ask the question what happens to the quantum speed limit under continuous me
Externí odkaz:
http://arxiv.org/abs/2406.09004
Traditional quantum speed limits formulated in density matrix space perform poorly for dynamics beyond unitary, as they are generally unattainable and fail to characterize the fastest possible dynamics. To address this, we derive two distinct quantum
Externí odkaz:
http://arxiv.org/abs/2406.08584
How fast an observable can evolve in time is answered by so-called the observable speed limit. Here, we prove a stronger version of the observable speed limit and show that the previously obtained bound is a special case of the new bound. The stronge
Externí odkaz:
http://arxiv.org/abs/2404.03247
Grover's quantum search algorithm promises a quadratic speedup for unstructured search over its classical counterpart. But this advantage is gradually reduced with noise acting on the search space. In this article, we demonstrate that a quantum switc
Externí odkaz:
http://arxiv.org/abs/2401.05866
The notions of predictability and visibility are essential in the mathematical formulation of wave particle duality. The work of Jakob and Bergou [Phys. Rev. A 76, 052107] generalises these notions for higher-dimensional quantum systems, which were i
Externí odkaz:
http://arxiv.org/abs/2401.01235
The Grover search algorithm performs an unstructured search of a marked item in a database quadratically faster than classical algorithms and is shown to be optimal. Here, we show that if the search space is divided into two blocks with the local que
Externí odkaz:
http://arxiv.org/abs/2312.05680
Autor:
Pati, Arun Kumar
The speed limit provides an upper bound for the dynamical evolution time of a quantum system. Here, we introduce the notion of quantum acceleration limit for unitary time evolution of quantum systems under time-dependent Hamiltonian. We prove that th
Externí odkaz:
http://arxiv.org/abs/2312.00864
Publikováno v:
Entropy 2023, 25(7), 1046. (Invited article in the 'Collection Quantum Information' of Entropy journal)
We derive a quantum speed limit for mixed quantum states using the stronger uncertainty relation for mixed quantum states and unitary evolution. We also show that this bound can be optimized over different choices of operators for obtaining a better
Externí odkaz:
http://arxiv.org/abs/2307.02215
The traditional quantum speed limits are not attainable for many physical processes, as they tend to be loose and fail to determine the exact time taken by quantum systems to evolve. To address this, we derive exact quantum speed limits for the unita
Externí odkaz:
http://arxiv.org/abs/2305.03839
Publikováno v:
Phys. Rev. A 108, 042620 (2023)
We investigate whether it is possible to teleport the coherence of an unknown quantum state from Alice to Bob by communicating a lesser number of classical bits in comparison to what is required for teleporting an unknown quantum state. We find that
Externí odkaz:
http://arxiv.org/abs/2302.11499