Kolokium Bulanan IQI
Kolokium 4 - Februari 2025
Kolaborasi IQI denga PRFK (Pusat Riset Fisika Kuantum) BRIN
“Spin-orbit splitting of Andreev states in a Josephson weak link”
ABSTRACT: A Finding qubit with long coherence times and high controllability is a long-standing goal in quantum information science and condensed matter physics. Spin degree of freedom confined by a superconducting gap has been considered as a new resource for such qubits. In this talk, I will present our recent theoretical and experimental studies on spin-split Andreev states in a semiconducting nanowire Josephson junction performed in collaboration with an experimental group. I provide a theoretical model for the junction which takes into account Rashba spin-orbit coupling in the nanowire containing several transverse subbands, identifying the spin-orbit splitting of Andreev states. The theory allows us to understand the response of the microwave resonator coupled to the junction observed in circuit quantum electrodynamics experiments. Finally, I discuss the possible uses of the Andreev spin states as a new superconducting qubit.
PEMBICARA: Dr. Sunghun Park
Research Scientist, Center for Theoretical Physics of Complex Systems,
Institute for Basic Science (IBS), South Korea
KAPAN?
25 Februari 2025
13.30-15.00 WIB
DIMANA??
Lokasi Luring:
Ruang Accountable, Gedung 720
KST B. J. Habibie (Puspiptek) Serpong
Zoom Meeting BRIN Quantum:
https://bit.ly/kolokium-20250225
Meeting ID: 944 8902 5297
Passcode: quantum
CATATAN: Kolokium ini GRATIS dan TERBUKA untuk umum, terutama mahasiswa, dosen, dan peneliti.
Mohon maaf penyelenggara tidak menyediakan sertifikat.
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Kolokium 3 - Februari 2025
Kolaborasi IQI denga PRFK (Pusat Riset Fisika Kuantum) BRIN
“Which quantum states can describe geometries? — a topological perspective”
ABSTRACT: A hundred years ago, Einstein taught us that gravity is a dynamical theory of spacetime geometry. The last 15 years of research have added a remarkable sequel to that lesson: there is strong evidence that the dynamical spacetime geometry is woven by quantum entanglement. But not all quantum entanglement can make up a geometry; some states have an entanglement structure, which cannot be consistently represented as a spacetime geometry. In this talk, I present progress done in my research group in characterizing which quantum states can / cannot define spacetime geometries. The new results involve a broad range of concepts, from black hole evaporation to tessellations of two-dimensional manifolds. Their many applications include a topological bound on entropies of 2+1-dimensional black holes and even a new theorem in graph theory. The main theme of this development is the discovery of novel, topological properties of holographic error correcting codes.
PEMBICARA:
Bartlomiej (Bartek) Czech, Ph.D.
Faculty Member (Assoc. Prof.)
at Institute for Advanced Study,
Tsinghua University, China
KAPAN?
4 Februari 2025
14.00-15.30 WIB
DIMANA??
Lokasi Luring:
Ruang Accountable, Gedung 720
KST B. J. Habibie (Puspiptek) Serpong
Zoom Meeting BRIN Quantum:
https://bit.ly/kolokium-20250204
Meeting ID: 959 2143 3781
Passcode: quantum
CATATAN: Kolokium ini GRATIS dan TERBUKA untuk umum, terutama mahasiswa, dosen, dan peneliti.
Mohon maaf penyelenggara tidak menyediakan sertifikat.
Like/Follow/Subscribe to our social media:
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https://instagram.com/quantumresearch.id
https://youtube.com/@brinquantum
Kolokium 2 - Januari 2025
Kolaborasi IQI denga PRFK (Pusat Riset Fisika Kuantum) BRIN
“Introduction to Superconducting Quantum Computers”
ABSTRACT: Quantum technology – in particularly quantum computing – have been gaining a lot of attention recently. While quantum physics is commonly studied with various applications, quantum information opens a new field of computing with the potential to revolutionize the modern world. In my talk, I will introduce what is a quantum computer and how to build one. I will also introduce how one can control the qubits using quantum gates and how to create these gates. Lastly, I will show some recent work on variational quantum eigensolves (VQE) done for nuclear pairing calculations using quantum simulators.
PEMBICARA:
Yap Yung Szen, Ph.D
Senior lecturer, Faculty of Science and Centre for Sustainable Nanomaterials (CSNano)
Universiti Teknologi Malaysia, Malaysia
KAPAN?
21 Januari 2025
15.00-16.30 WIB
DIMANA??
Lokasi Luring:
Ruang Accountable, Gedung 720
KST B. J. Habibie (Puspiptek) Serpong
Zoom Meeting BRIN Quantum:
https://bit.ly/kolokium-20250121
Meeting ID: 955 8311 3487
Passcode: quantum
CATATAN: Kolokium ini GRATIS dan TERBUKA untuk umum, terutama mahasiswa, dosen, dan peneliti.
Mohon maaf penyelenggara tidak menyediakan sertifikat.
Like/Follow/Subscribe to our social media:
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Kolokium 1 - Januari 2025
Kolaborasi IQI denga PRFK (Pusat Riset Fisika Kuantum) BRIN
“Satellites for quantum communications”
ABSTRACT: Quantum mechanics has opened the way to the implementation of protocols whose security depends on the very laws of physics. The high fragility of quantum states to losses makes the use of satellites fundamental to implement these protocols on a global scale. This presentation will make a short review of the state of the art of satellite quantum communication, with particular focus on simulation methods and on the status of current research at Sorbonne University. Then, it will provide a short overview of new directions that the research in the field might take in the near future.
PEMBICARA:
Dr. Matteo Schiavon
Researcher @ Sorbonne Université, CNRS, LIP6, France
KAPAN?
14 Januari 2025
10.00-11.30 WIB
DIMANA??
Lokasi Luring:
Ruang Accountable, Gedung 720
KST B. J. Habibie (Puspiptek) Serpong
Zoom Meeting BRIN Quantum:
https://bit.ly/kolokium-20250114
Meeting ID: 954 6599 7145
Passcode: quantum
CATATAN: Kolokium ini GRATIS dan TERBUKA untuk umum, terutama mahasiswa, dosen, dan peneliti.
Mohon maaf penyelenggara tidak menyediakan sertifikat.
Like/Follow/Subscribe to our social media:
https://fb.com/quantumresearch.id
https://instagram.com/quantumresearch.id
https://youtube.com/@brinquantum