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Keywords

Nonequilirium dynamics, Quantum phase transition, Classical and Quantum chaos, Ultracold atomic systems

Countries

Germany, India, Israel, France

Biography

I am Sayak Ray from India. I am a theoretical physicist working in the area of Condensed Matter Physics and Statistical Mechanics in general, and specifically on the correlated phases and quantum phase transition of ultracold atomic gases. My research interest relies on nonequilibrium dynamics in quantum many-body systems, periodically driven systems. Many-Body Localization (MBL), Quantum chaos, thermalization, and application of random matrix theory (RMT) in many-body systems. I am currently the Humboldt Research Fellow at the Physics Institut of the University of Bonn in Germany.

Activities

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Employment (3)

University of Bonn: Bonn, North Rhine-Westphalia, DE

2022-11-01 to present | Postdoctoral Fellow (Host: Prof. Johann Kroha) (Physikalisches Institut)
Employment
Source: Self-asserted source
Sayak Ray

University of Bonn: Bonn, North Rhine-Westphalia, DE

2020-09-01 to 2022-10-31 | Humboldt Research Fellow (Host: Prof. Johann Kroha) (Physikalisches Institut)
Employment
Source: Self-asserted source
Sayak Ray

Ben-Gurion University of the Negev: Beer-Sheva, Southern, IL

2019-06-01 to 2020-08-31 | Postdoctoral Fellow (Host: Prof. Amichay Vardi) (Chemistry Department)
Employment
Source: Self-asserted source
Sayak Ray

Education and qualifications (2)

Indian Institute of Science Education and Research Kolkata: Kolkata, West Bengal, IN

2013-08-01 to 2019-05-15 | Integrated PhD (MS+PhD) (Supervisor: Prof. Subhasis Sinha) (Department of Physics)
Qualification
Source: Self-asserted source
Sayak Ray

University of Calcutta: Kolkata, West Bengal, IN

2010-07-01 to 2013-05-31 | BSc (Physics Department, Ramakrishna Mission Vidyamandira, Belur Math)
Education
Source: Self-asserted source
Sayak Ray

Professional activities (5)

Deutsche Physikalische Gesellschaft e V: Bad Honnef, Nordrhein-Westfalen, DE

2020-11-01 to present | Early Career Researcher
Membership
Source: Self-asserted source
Sayak Ray

Alexander von Humboldt Foundation: Bonn, North Rhine-Westphalia, DE

2019-07-01 | Humboldt Research Fellow (Physikalisches Institut)
Distinction
Source: Self-asserted source
Sayak Ray

Laboratoire de Physique Théorique et Modèles Statistiques: Orsay, Île-de-France, FR

2017-11-01 to 2018-01-31 | Visiting Research Student with Prof. Georgy Shlyapnikov
Invited position
Source: Self-asserted source
Sayak Ray

Ministry of Human Resource Development: Delhi, Delhi, IN

2014-06-01 | National Eligibility Test (LS)
Distinction
Source: Self-asserted source
Sayak Ray

Department of Science and Technology, Ministry of Science and Technology, India: Delhi, Delhi, IN

2010-09-01 | INSPIRE Fellowship
Distinction
Source: Self-asserted source
Sayak Ray

Funding (2)

Reservoir control of an open photon Bose-Einstein condensate system

2022-11 to 2025-10 | Grant
DFG (Bonn, North Rhine-Westphalia, DE)
URL: https://www.physik.uni-kl.de/oscar/index.php/projects/project-area-b/b1
Source: Self-asserted source
Sayak Ray

Dynamics of driven dissipative quantum systems

2020-09 to 2022-11 | Grant
Alexander von Humboldt-Stiftung (Bonn, DE)
Source: Self-asserted source
Sayak Ray

Works (19)

Temporal Bistability in the Dissipative Dicke‐Bose‐Hubbard System

Annalen der Physik
2024-06 | Journal article
DOI: 10.1002/andp.202300505
Contributors: Tianyi Wu; Sayak Ray; Johann Kroha
Source: check_circle
Crossref

Classical route to ergodicity and scarring in collective quantum systems

Journal of Physics: Condensed Matter
2024-04-24 | Journal article
DOI: 10.1088/1361-648X/ad1bf5
Contributors: Sudip Sinha; Sayak Ray; Subhasis Sinha
Source: check_circle
Crossref

Chaos-assisted many-body tunnelling

Physical Review E
2022-10-27 | Journal article
DOI: 10.1103/PhysRevE.106.L042204
Contributors: Urbashi Satpathi; Sayak Ray; Amichay Vardi
Source: check_circle
Crossref

Classical route to ergodicity and scarring phenomena in a two-component Bose-Josephson junction

Physical Review A
2022-10-21 | Journal article
DOI: 10.1103/PhysRevA.106.043321
Contributors: Debabrata Mondal; Sudip Sinha; Sayak Ray; Johann Kroha; Subhasis Sinha
Source: check_circle
Crossref

Nonlocal Correlation and Entanglement of Ultracold Bosons in the 2D Bose–Hubbard Lattice at Finite Temperature

Annalen der Physik
2022-05 | Journal article
DOI: 10.1002/andp.202100581
Contributors: Ulli Pohl; Sayak Ray; Johann Kroha
Source: check_circle
Crossref

Quantum Signatures in Quench from Chaos to Superradiance

Physical Review Letters
2022-04-01 | Journal article
DOI: 10.1103/PhysRevLett.128.130604
Contributors: Sayak Ray; Amichay Vardi; Doron Cohen
Source: check_circle
Crossref

Fingerprint of chaos and quantum scars in kicked Dicke model: an out-of-time-order correlator study

Journal of Physics: Condensed Matter
2021-04-28 | Journal article
DOI: 10.1088/1361-648X/abe26b
Contributors: Sudip Sinha; Sayak Ray; Subhasis Sinha
Source: check_circle
Crossref

Phases and collective modes of bosons in a triangular lattice at finite temperature: A cluster mean field study

Physical Review B
2020-11-24 | Journal article
DOI: 10.1103/PhysRevB.102.184515
Contributors: M. Malakar; S. Ray; S. Sinha; D. Angom
Source: check_circle
Crossref

Prethermalization with negative specific heat

Physical Review E
2020-11-05 | Journal article
DOI: 10.1103/PhysRevE.102.052107
Contributors: Sayak Ray; James R. Anglin; Amichay Vardi
Source: check_circle
Crossref

Dynamics of quasiperiodically driven spin systems

Physical Review E
2019-11-21 | Journal article
DOI: 10.1103/PhysRevE.100.052129
Contributors: Sayak Ray; Subhasis Sinha; Diptiman Sen
Source: check_circle
Crossref

Chaos induced breakdown of Bose-Hubbard modeling

Phys. Rev. A 101, 013624 (2020)
2019-08-06 | Journal article
DOI: 10.1103/physreva.101.013624
ARXIV: arXiv:1908.01987v2
Source: Self-asserted source
Sayak Ray

One-Dimensional Quasicrystals with Power-Law Hopping

Physical Review Letters
2019-07-10 | Journal article
DOI: 10.1103/physrevlett.123.025301
Part of ISSN: 0031-9007
Part of ISSN: 1079-7114
Source: Self-asserted source
Sayak Ray

Signature of chaos and delocalization in a periodically driven many-body system: An out-of-time-order-correlation study

Physical Review A
2018-11-27 | Journal article
DOI: 10.1103/physreva.98.053631
Part of ISSN: 2469-9926
Part of ISSN: 2469-9934
Source: Self-asserted source
Sayak Ray

Drive-induced delocalization in the Aubry-André model

Physical Review E
2018-01-03 | Journal article
DOI: 10.1103/physreve.97.010101
Part of ISSN: 2470-0045
Part of ISSN: 2470-0053
Source: Self-asserted source
Sayak Ray

Bosons with incommensurate potential and spin-orbit coupling

Physical Review A
2017-08-04 | Journal article
DOI: 10.1103/physreva.96.023607
Part of ISSN: 2469-9926
Part of ISSN: 2469-9934
Source: Self-asserted source
Sayak Ray

Quantum signature of chaos and thermalization in the kicked Dicke model

Physical Review E
2016-09-01 | Journal article
DOI: 10.1103/physreve.94.032103
Part of ISSN: 2470-0045
Part of ISSN: 2470-0053
Source: Self-asserted source
Sayak Ray

Phases, collective modes, and nonequilibrium dynamics of dissipative Rydberg atoms

Physical Review A
2016-03-14 | Journal article
DOI: 10.1103/physreva.93.033627
Part of ISSN: 2469-9926
Part of ISSN: 2469-9934
Source: Self-asserted source
Sayak Ray

Localization of weakly interacting Bose gas in quasiperiodic potential

New Journal of Physics
2015-12-29 | Journal article
DOI: 10.1088/1367-2630/18/1/013013
Part of ISSN: 1367-2630
Source: Self-asserted source
Sayak Ray

Effect of spin-orbit interaction on the critical temperature of an ideal Bose gas

The European Physical Journal D
2014-12 | Journal article
DOI: 10.1140/epjd/e2014-50394-9
Part of ISSN: 1434-6060
Part of ISSN: 1434-6079
Source: Self-asserted source
Sayak Ray

Peer review (1 review for 1 publication/grant)

Review activity for The European physical journal. (1)
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