Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Sarkar, Saubhik"'
Quantum sensors based on critical many-body systems are known to exhibit enhanced sensing capability. Such enhancements typically scale algebraically with the probe size. Going beyond algebraic advantage and reaching exponential scaling has remained
Externí odkaz:
http://arxiv.org/abs/2410.11426
Autor:
Montenegro, Victor, Mukhopadhyay, Chiranjib, Yousefjani, Rozhin, Sarkar, Saubhik, Mishra, Utkarsh, Paris, Matteo G. A., Bayat, Abolfazl
The main power of quantum sensors is achieved when the probe is composed of several particles. In this situation, quantum features such as entanglement contribute in enhancing the precision of quantum sensors beyond the capacity of classical sensors.
Externí odkaz:
http://arxiv.org/abs/2408.15323
Publikováno v:
New J. Phys. 26 073010 (2024)
Non-Hermitian physics predicts open quantum system dynamics with unique topological features such as exceptional points and the non-Hermitian skin effect. We show that this new paradigm of topological systems can serve as probes for bulk Hamiltonian
Externí odkaz:
http://arxiv.org/abs/2311.12756
Publikováno v:
Phys. Rev. Lett. 129, 090503 (2022)
Second order quantum phase transitions, with well-known features such as long-range entanglement, symmetry breaking, and gap closing, exhibit quantum enhancement for sensing at criticality. However, it is unclear which of these features are responsib
Externí odkaz:
http://arxiv.org/abs/2201.07102
Autor:
Sarkar, Saubhik, Sowiński, Tomasz
Publikováno v:
Phys. Rev. A 102, 043326 (2020)
We study the effect of inter-component interactions on the dynamical properties of quantum walkers. We consider the simplest situation of two indistinguishable non-interacting walkers on a tilted optical lattice interacting with a walker from a diffe
Externí odkaz:
http://arxiv.org/abs/2006.13744
Publikováno v:
New J. Phys. 22 083077 (2020)
Quantum many-body systems have been extensively studied from the perspective of quantum technology, and conversely, critical phenomena in such systems have been characterized by operationally relevant resources like entanglement. In this paper, we in
Externí odkaz:
http://arxiv.org/abs/1908.08058
Autor:
Sarkar, Saubhik
Ultracold atoms in optical lattices have proven to be an ideal testbed for simulating strongly correlated condensed matter physics. The microscopic understanding of the underlying Hamiltonian and precise control over the Hamiltonian parameters via ex
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.736856
Publikováno v:
New J. Phys. 22 083017 (2020)
The dynamics of impurity atoms introduced into bosonic gases in an optical lattice have generated a lot of recent interest, both in theory and experiment. We investigate to what extent measurements on either the impurity species or the majority speci
Externí odkaz:
http://arxiv.org/abs/1805.01592
Autor:
Sarkar, Saubhik, Sen, Ujjwal
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 55 205502 (2022)
We address the effects of quenched disorder averaging in the time-evolution of systems of ultracold atoms in optical lattices in the presence of noise, imposed by of an environment. For bosonic systems governed by the Bose-Hubbard Hamiltonian, we qua
Externí odkaz:
http://arxiv.org/abs/1804.09621
Autor:
Lüschen, Henrik P., Bordia, Pranjal, Hodgman, Sean S., Schreiber, Michael, Sarkar, Saubhik, Daley, Andrew J., Fischer, Mark H., Altman, Ehud, Bloch, Immanuel, Schneider, Ulrich
Publikováno v:
Phys. Rev. X 7, 011034 (2017)
In the presence of disorder, an interacting closed quantum system can undergo many-body localization (MBL) and fail to thermalize. However, over long times even weak couplings to any thermal environment will necessarily thermalize the system and eras
Externí odkaz:
http://arxiv.org/abs/1610.01613