Focaliser sur:
Tous les jours
18 mars 2024
19 mars 2024
20 mars 2024
Indico style
Indico style - inline minutes
Indico style - numbered
Indico style - numbered + minutes
Indico Weeks View
Retour à l'affichage de la conférence
Choisissez le fuseau horaire
Utiliser le fuseau horaire de l'événement/catégorie
Veuillez spécifier un fuseau horaire
Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
Africa/Asmara
Africa/Bamako
Africa/Bangui
Africa/Banjul
Africa/Bissau
Africa/Blantyre
Africa/Brazzaville
Africa/Bujumbura
Africa/Cairo
Africa/Casablanca
Africa/Ceuta
Africa/Conakry
Africa/Dakar
Africa/Dar_es_Salaam
Africa/Djibouti
Africa/Douala
Africa/El_Aaiun
Africa/Freetown
Africa/Gaborone
Africa/Harare
Africa/Johannesburg
Africa/Juba
Africa/Kampala
Africa/Khartoum
Africa/Kigali
Africa/Kinshasa
Africa/Lagos
Africa/Libreville
Africa/Lome
Africa/Luanda
Africa/Lubumbashi
Africa/Lusaka
Africa/Malabo
Africa/Maputo
Africa/Maseru
Africa/Mbabane
Africa/Mogadishu
Africa/Monrovia
Africa/Nairobi
Africa/Ndjamena
Africa/Niamey
Africa/Nouakchott
Africa/Ouagadougou
Africa/Porto-Novo
Africa/Sao_Tome
Africa/Tripoli
Africa/Tunis
Africa/Windhoek
America/Adak
America/Anchorage
America/Anguilla
America/Antigua
America/Araguaina
America/Argentina/Buenos_Aires
America/Argentina/Catamarca
America/Argentina/Cordoba
America/Argentina/Jujuy
America/Argentina/La_Rioja
America/Argentina/Mendoza
America/Argentina/Rio_Gallegos
America/Argentina/Salta
America/Argentina/San_Juan
America/Argentina/San_Luis
America/Argentina/Tucuman
America/Argentina/Ushuaia
America/Aruba
America/Asuncion
America/Atikokan
America/Bahia
America/Bahia_Banderas
America/Barbados
America/Belem
America/Belize
America/Blanc-Sablon
America/Boa_Vista
America/Bogota
America/Boise
America/Cambridge_Bay
America/Campo_Grande
America/Cancun
America/Caracas
America/Cayenne
America/Cayman
America/Chicago
America/Chihuahua
America/Ciudad_Juarez
America/Costa_Rica
America/Creston
America/Cuiaba
America/Curacao
America/Danmarkshavn
America/Dawson
America/Dawson_Creek
America/Denver
America/Detroit
America/Dominica
America/Edmonton
America/Eirunepe
America/El_Salvador
America/Fort_Nelson
America/Fortaleza
America/Glace_Bay
America/Goose_Bay
America/Grand_Turk
America/Grenada
America/Guadeloupe
America/Guatemala
America/Guayaquil
America/Guyana
America/Halifax
America/Havana
America/Hermosillo
America/Indiana/Indianapolis
America/Indiana/Knox
America/Indiana/Marengo
America/Indiana/Petersburg
America/Indiana/Tell_City
America/Indiana/Vevay
America/Indiana/Vincennes
America/Indiana/Winamac
America/Inuvik
America/Iqaluit
America/Jamaica
America/Juneau
America/Kentucky/Louisville
America/Kentucky/Monticello
America/Kralendijk
America/La_Paz
America/Lima
America/Los_Angeles
America/Lower_Princes
America/Maceio
America/Managua
America/Manaus
America/Marigot
America/Martinique
America/Matamoros
America/Mazatlan
America/Menominee
America/Merida
America/Metlakatla
America/Mexico_City
America/Miquelon
America/Moncton
America/Monterrey
America/Montevideo
America/Montserrat
America/Nassau
America/New_York
America/Nome
America/Noronha
America/North_Dakota/Beulah
America/North_Dakota/Center
America/North_Dakota/New_Salem
America/Nuuk
America/Ojinaga
America/Panama
America/Paramaribo
America/Phoenix
America/Port-au-Prince
America/Port_of_Spain
America/Porto_Velho
America/Puerto_Rico
America/Punta_Arenas
America/Rankin_Inlet
America/Recife
America/Regina
America/Resolute
America/Rio_Branco
America/Santarem
America/Santiago
America/Santo_Domingo
America/Sao_Paulo
America/Scoresbysund
America/Sitka
America/St_Barthelemy
America/St_Johns
America/St_Kitts
America/St_Lucia
America/St_Thomas
America/St_Vincent
America/Swift_Current
America/Tegucigalpa
America/Thule
America/Tijuana
America/Toronto
America/Tortola
America/Vancouver
America/Whitehorse
America/Winnipeg
America/Yakutat
Antarctica/Casey
Antarctica/Davis
Antarctica/DumontDUrville
Antarctica/Macquarie
Antarctica/Mawson
Antarctica/McMurdo
Antarctica/Palmer
Antarctica/Rothera
Antarctica/Syowa
Antarctica/Troll
Antarctica/Vostok
Arctic/Longyearbyen
Asia/Aden
Asia/Almaty
Asia/Amman
Asia/Anadyr
Asia/Aqtau
Asia/Aqtobe
Asia/Ashgabat
Asia/Atyrau
Asia/Baghdad
Asia/Bahrain
Asia/Baku
Asia/Bangkok
Asia/Barnaul
Asia/Beirut
Asia/Bishkek
Asia/Brunei
Asia/Chita
Asia/Choibalsan
Asia/Colombo
Asia/Damascus
Asia/Dhaka
Asia/Dili
Asia/Dubai
Asia/Dushanbe
Asia/Famagusta
Asia/Gaza
Asia/Hebron
Asia/Ho_Chi_Minh
Asia/Hong_Kong
Asia/Hovd
Asia/Irkutsk
Asia/Jakarta
Asia/Jayapura
Asia/Jerusalem
Asia/Kabul
Asia/Kamchatka
Asia/Karachi
Asia/Kathmandu
Asia/Khandyga
Asia/Kolkata
Asia/Krasnoyarsk
Asia/Kuala_Lumpur
Asia/Kuching
Asia/Kuwait
Asia/Macau
Asia/Magadan
Asia/Makassar
Asia/Manila
Asia/Muscat
Asia/Nicosia
Asia/Novokuznetsk
Asia/Novosibirsk
Asia/Omsk
Asia/Oral
Asia/Phnom_Penh
Asia/Pontianak
Asia/Pyongyang
Asia/Qatar
Asia/Qostanay
Asia/Qyzylorda
Asia/Riyadh
Asia/Sakhalin
Asia/Samarkand
Asia/Seoul
Asia/Shanghai
Asia/Singapore
Asia/Srednekolymsk
Asia/Taipei
Asia/Tashkent
Asia/Tbilisi
Asia/Tehran
Asia/Thimphu
Asia/Tokyo
Asia/Tomsk
Asia/Ulaanbaatar
Asia/Urumqi
Asia/Ust-Nera
Asia/Vientiane
Asia/Vladivostok
Asia/Yakutsk
Asia/Yangon
Asia/Yekaterinburg
Asia/Yerevan
Atlantic/Azores
Atlantic/Bermuda
Atlantic/Canary
Atlantic/Cape_Verde
Atlantic/Faroe
Atlantic/Madeira
Atlantic/Reykjavik
Atlantic/South_Georgia
Atlantic/St_Helena
Atlantic/Stanley
Australia/Adelaide
Australia/Brisbane
Australia/Broken_Hill
Australia/Darwin
Australia/Eucla
Australia/Hobart
Australia/Lindeman
Australia/Lord_Howe
Australia/Melbourne
Australia/Perth
Australia/Sydney
Canada/Atlantic
Canada/Central
Canada/Eastern
Canada/Mountain
Canada/Newfoundland
Canada/Pacific
Europe/Amsterdam
Europe/Andorra
Europe/Astrakhan
Europe/Athens
Europe/Belgrade
Europe/Berlin
Europe/Bratislava
Europe/Brussels
Europe/Bucharest
Europe/Budapest
Europe/Busingen
Europe/Chisinau
Europe/Copenhagen
Europe/Dublin
Europe/Gibraltar
Europe/Guernsey
Europe/Helsinki
Europe/Isle_of_Man
Europe/Istanbul
Europe/Jersey
Europe/Kaliningrad
Europe/Kirov
Europe/Kyiv
Europe/Lisbon
Europe/Ljubljana
Europe/London
Europe/Luxembourg
Europe/Madrid
Europe/Malta
Europe/Mariehamn
Europe/Minsk
Europe/Monaco
Europe/Moscow
Europe/Oslo
Europe/Paris
Europe/Podgorica
Europe/Prague
Europe/Riga
Europe/Rome
Europe/Samara
Europe/San_Marino
Europe/Sarajevo
Europe/Saratov
Europe/Simferopol
Europe/Skopje
Europe/Sofia
Europe/Stockholm
Europe/Tallinn
Europe/Tirane
Europe/Ulyanovsk
Europe/Vaduz
Europe/Vatican
Europe/Vienna
Europe/Vilnius
Europe/Volgograd
Europe/Warsaw
Europe/Zagreb
Europe/Zurich
GMT
Indian/Antananarivo
Indian/Chagos
Indian/Christmas
Indian/Cocos
Indian/Comoro
Indian/Kerguelen
Indian/Mahe
Indian/Maldives
Indian/Mauritius
Indian/Mayotte
Indian/Reunion
Pacific/Apia
Pacific/Auckland
Pacific/Bougainville
Pacific/Chatham
Pacific/Chuuk
Pacific/Easter
Pacific/Efate
Pacific/Fakaofo
Pacific/Fiji
Pacific/Funafuti
Pacific/Galapagos
Pacific/Gambier
Pacific/Guadalcanal
Pacific/Guam
Pacific/Honolulu
Pacific/Kanton
Pacific/Kiritimati
Pacific/Kosrae
Pacific/Kwajalein
Pacific/Majuro
Pacific/Marquesas
Pacific/Midway
Pacific/Nauru
Pacific/Niue
Pacific/Norfolk
Pacific/Noumea
Pacific/Pago_Pago
Pacific/Palau
Pacific/Pitcairn
Pacific/Pohnpei
Pacific/Port_Moresby
Pacific/Rarotonga
Pacific/Saipan
Pacific/Tahiti
Pacific/Tarawa
Pacific/Tongatapu
Pacific/Wake
Pacific/Wallis
US/Alaska
US/Arizona
US/Central
US/Eastern
US/Hawaii
US/Mountain
US/Pacific
UTC
Sauver
Europe/Paris
Français
Deutsch (Deutschland)
English (United Kingdom)
English (United States)
Español (España)
Français (France)
Italiano (Italia)
Polski (Polska)
Português (Brasil)
Türkçe (Türkiye)
Čeština (Česko)
Монгол (Монгол)
Українська (Україна)
中文 (中国)
S'authentifier
Driven Quantum Systems
de
lundi 18 mars 2024 (09:00)
à
mercredi 20 mars 2024 (18:00)
lundi 18 mars 2024
09:00
Registration/Welcome coffee
Registration/Welcome coffee
09:00 - 09:30
09:30
Defining quantum and classical chaos through adiabatic complexity
-
Anatoli Polkovnikov
(
Boston University
)
Defining quantum and classical chaos through adiabatic complexity
Anatoli Polkovnikov
(
Boston University
)
09:30 - 10:00
In this talk I will show that the notion of chaos both in quantum and classical Hamiltonian systems can be rigorously formulated through complexity of adiabatic transformations. This complexity is encoded in the fidelity susceptibility or more broadly in the geometric tensor. In classical systems this measure reflects complexity of trajectory-preserving canonical transformations under infinitesimal deformations of the Hamiltonian, while in quantum systems it reflects complexity of eigenstate transformations. I will argue that generically integrable and ergodic regimes are separated by a buffer KAM glassy region with a sharp maximum of this susceptibility inside. The KAM regime can be either transient but very long lived in the thermodynamic limit or be stable in finite size systems. In gases or fluids this KAM regime is familiar to us through emergence of highly unstable turbulent flows at small interaction strengths. I will also argue that the transition from integrable to ergodic/mixing regimes is generally described by a two-parameter finite time scaling theory with integrable points playing a similar role to critical points for continuous phase transitions.
10:00
Physical Neural Networks: Harnessing Quantum Dynamics for Learning Weak Signals
-
Hakan Tureci
(
Princeton University
)
Physical Neural Networks: Harnessing Quantum Dynamics for Learning Weak Signals
Hakan Tureci
(
Princeton University
)
10:00 - 10:30
10:30
Pause Café
Pause Café
10:30 - 11:00
11:00
A renormalization group analysis of the Anderson transition in infinite dimensions
-
Antonello Scardicchio
(
The Abdus Salam ICTP
)
A renormalization group analysis of the Anderson transition in infinite dimensions
Antonello Scardicchio
(
The Abdus Salam ICTP
)
11:00 - 11:30
I will present a renormalization group analysis of the problem of the Anderson localization on a Regular Random Graph which is the limit of the RG flow of Abrahams, Anderson, Licciardello, and Ramakrishnan to infinite-dimensional graphs. I will show how the one-parameter scaling hypothesis is recovered for sufficiently large system sizes for both eigenstates and spectrum observables and explain the non-monotonic behavior of dynamical and spectral quantities as a function of the system size for values of disorder close to the transition. I will show the implications of our work for Many-Body Localization.
11:30
Measurement-induced phase transition and KPZ physics in classical and quantum single-body systems
-
Zizhuo Tony Jin
(
Université de Nice
)
Measurement-induced phase transition and KPZ physics in classical and quantum single-body systems
Zizhuo Tony Jin
(
Université de Nice
)
11:30 - 12:00
The tension created by the interplay of the contrary forces of chaos and measurements can lead to fascinating emerging phenomena, as exemplified by the recently discovered Measurement-induced Phase Transitions (MiPT) in quantum chaotic many-body systems undergoing continuous or projective measurements. In this talk, I will demonstrate that this tension still remains when the problem is reduced to a single-body for both classical and quantum systems and that salient features of this problem can be understood by exploiting a connection with KPZ physics in the weak monitoring/short time/smooth interface regime.
12:00
Group Photo
Group Photo
12:00 - 12:10
12:10
Lunch Break
Lunch Break
12:10 - 14:00
14:00
Topological entanglement transitions in free fermions: From projective to weak monitoring
-
Dganit Meidan
(
Ben Gurion University of the Negev, Israel
)
Topological entanglement transitions in free fermions: From projective to weak monitoring
Dganit Meidan
(
Ben Gurion University of the Negev, Israel
)
14:00 - 14:30
14:30
Active quantum flocks
-
Markus Heyl
(
University of Augsburg
)
Active quantum flocks
Markus Heyl
(
University of Augsburg
)
14:30 - 15:00
Flocks of animals represent a fascinating archetype of collective behavior in the macroscopic classical world, where the constituents, such as birds, concertedly perform motions and actions as if being one single entity. Here, we address the outstanding question of whether flocks can also form in the microscopic world at the quantum level. For that purpose, we introduce the concept of active quantum matter by formulating a class of models of active quantum particles on a one-dimensional lattice. We provide both analytical and large-scale numerical evidence that these systems can give rise to quantum flocks. A key finding is that these flocks, unlike classical ones, exhibit distinct quantum properties by developing strong quantum coherence over long distances. We propose that quantum flocks could be experimentally observed in Rydberg atom arrays. Our work paves the way towards realizing the intriguing collective behaviors of biological active particles in quantum matter systems. We expect that this opens up a path towards a yet totally unexplored class of nonequilibrium quantum many-body systems with unique properties.
15:00
Coffee Break
Coffee Break
15:00 - 15:30
15:30
Adiabatic Lindbladian Evolution with Small Dissipators
-
Alain Joye
(
Université Grenoble Alpes
)
Adiabatic Lindbladian Evolution with Small Dissipators
Alain Joye
(
Université Grenoble Alpes
)
15:30 - 16:00
We consider a time-dependent small quantum system weakly coupled to an environment, whose effective dynamics we address by means of a Lindblad equation. We assume the Hamiltonian part of the Lindbladian is slowly varying in time and the dissipator part has small amplitude. We study the properties of the evolved state of the small system as the adiabatic parameter and coupling constant both go to zero, in various asymptotic regimes.
16:00
Noise-induced phase transitions in encoding-decoding systems
-
Xhek Turkeshi
(
College de France
)
Noise-induced phase transitions in encoding-decoding systems
Xhek Turkeshi
(
College de France
)
16:00 - 16:30
16:30
Poster session
Poster session
16:30 - 17:30
mardi 19 mars 2024
09:30
Linear and nonlinear quantum dynamics of fractional quantum Hall fluids
-
Iacopo Carisotto
(
CNR-INO, Pitaevskii BEC Center, Trento Italy
)
Linear and nonlinear quantum dynamics of fractional quantum Hall fluids
Iacopo Carisotto
(
CNR-INO, Pitaevskii BEC Center, Trento Italy
)
09:30 - 10:00
In this talk I will review recent theoretical results on the linear, nonlinear and quantum dynamics of the edge modes of a trapped fractional quantum Hall fluid. A generalized nonlinear chiral Luttinger liquid theory will be presented, together with its validation against numerical results obtained with a combination of Monte Carlo and exact diagonalization methods. A first application of this theory to quantum nonlinear optics of edge waves will be discussed and schemes to generate quantum states of the edge modes will be proposed. Perspectives in the direction of using quantum point contacts as nonlinear beam splitters will be finally highlighted.
10:00
Machine learning for and from complex quantum dynamics
-
Cristiano Ciuti
(
Université Paris Cité
)
Machine learning for and from complex quantum dynamics
Cristiano Ciuti
(
Université Paris Cité
)
10:00 - 10:30
This talk is a tale of two halves. In the first part, we will discuss recent progress on the use of variational neural quantum states to describe the non-unitary and/or non-equilibrium dynamics of quantum many-body systems [1,2]. In the second part, we will show how the complex dynamics of quantum systems can be harnessed as a resource for machine learning and neuromorphic devices. In particular, we will discuss photonic kernel machines [3], noisy quantum kernel machines [4], reservoir computing based on relativity-inspired quantum dynamics [5] and an efficient scheme to estimate the trainability of large-size variational quantum circuits [6]. References: [1] F. Vicentini, A. Biella, N. Regnault, and C. Ciuti, Variational Neural-Network Ansatz for Steady States in Open Quantum Systems, Phys. Rev. Lett. 122, 250503 (2019) [2] K. Donatella, Z. Denis, A. Le Boité, and C. Ciuti, Dynamics with autoregressive neural quantum states: Application to critical quench dynamics, Phys. Rev. A 108, 022210 (2023) [3] Z. Denis, I. Favero, C. Ciuti, Photonic kernel machine learning for ultrafast spectral analysis, Physical Review Applied 17, 034077 (2022). [4] V. Heyraud, Z. Li, Z. Denis, A. Le Boité, and C. Ciuti, Noisy quantum kernel machines, Phys. Rev. A 106, 052421 (2022) [5] Z. Li, V. Heyraud, K. Donatella, Z. Denis, and C. Ciuti, Machine learning via relativity-inspired quantum dynamics, Phys. Rev. A 106, 032413 (2022) [6] V. Heyraud, Z. Li, K. Donatella, A. Le Boité, and C. Ciuti, Efficient Estimation of Trainability for Variational Quantum Circuits, PRX Quantum 4, 040335 (2023)
10:30
Coffee Break
Coffee Break
10:30 - 11:00
11:00
Fully Quantum Scalable Approaches to Driven-Dissipative Lattice Models
-
Marzena Szymanska
(
UCL
)
Fully Quantum Scalable Approaches to Driven-Dissipative Lattice Models
Marzena Szymanska
(
UCL
)
11:00 - 11:30
11:30
Time-tronics: from temporal printed circuit board to quantum computer
-
Krzysztof Sacha
(
Jagiellonian University
)
Time-tronics: from temporal printed circuit board to quantum computer
Krzysztof Sacha
(
Jagiellonian University
)
11:30 - 12:00
Time crystalline structures can be created in periodically driven systems. They are temporal lattices which can reveal different condensed matter behaviours ranging from Anderson localization in time to temporal analogues of many-body localization or topological insulators. However, the potential practical applications of time crystalline structures have not yet been demonstrated. We pave the way for time-tronics where temporal lattices are like printed circuit boards for realization of a broad range of quantum devices. The elements of these devices can correspond to structures of dimensions higher than three and can be arbitrarily connected and reconfigured at any moment. Moreover, our approach allows for the construction of a quantum computer, enabling quantum gate operations for all possible pairs of qubits. Our findings indicate that the limitations faced in building devices using conventional spatial crystals can be overcome by adopting crystalline structures in time.
12:00
Lunch Break
Lunch Break
12:00 - 14:00
14:00
Multipartite entanglement and measurement induced phase transitions
-
Alessandro Silva
(
SISSA
)
Multipartite entanglement and measurement induced phase transitions
Alessandro Silva
(
SISSA
)
14:00 - 14:30
14:30
Universality of time crystalline order
-
Sébastien Diehl
(
Univ of cologne
)
Universality of time crystalline order
Sébastien Diehl
(
Univ of cologne
)
14:30 - 15:00
15:00
Coffee Break
Coffee Break
15:00 - 15:30
15:30
The Poincaré disk underlying many distinct non-equilibrium quantum dynamics
-
Qi Zhu
(
Purdue University
)
The Poincaré disk underlying many distinct non-equilibrium quantum dynamics
Qi Zhu
(
Purdue University
)
15:30 - 16:00
16:00
Transport and Entanglement in Monitored Quantum Systems
-
Marco Shiro
(
College de France
)
Transport and Entanglement in Monitored Quantum Systems
Marco Shiro
(
College de France
)
16:00 - 16:30
16:30
Yang-Lee zeros, semicircle theorem and nonunitary criticality in open quantum dynamics
-
Masahito Ueda
(
The University of Tokyo
)
Yang-Lee zeros, semicircle theorem and nonunitary criticality in open quantum dynamics
Masahito Ueda
(
The University of Tokyo
)
16:30 - 17:00
The Yang-Lee edge singularity is a quintessential nonunitary critical phenomenon characterized by anomalous scaling. However, an imaginary magnetic field involved in this phenomenon makes its physical implementation highly nontrivial. We invoke the quantum-classical correspondence and quantum measurement to physically realize the nonunitary quantum criticality in an open quantum system [1]. In particular, we show that the essential singularity in the superconducting gap is directly related to the number of Yang-Lee zeros which are distributed on a semicircle in the complex plane of the interaction strength due to the Fermi-surface instability. We also present photonic experiments to directly measure the partition function and the Yang-Lee zeros, where unconventional scaling laws for finite-temperature quantum dynamics are observed and agree with our theory predictions [3]. [1] N. Matsumoto, M. Nakagawa, and M. Ueda, Phys. Rev. Res. 4, 033250 (2022). [2] H. Li, X.-H. Yu, M. Nakawaga, and M. Ueda, Phys. Rev. Lett. 131, 216001 (2023). [3] H. Gao, K. Wang, L. Xiao, M. Nakagawa, N. Matsumoto, D. Qu, H. Lin, M. Ueda, and P. Xue, arXiv:2312.01706.
18:00
Cocktail Dinner Party
Cocktail Dinner Party
18:00 - 21:00
mercredi 20 mars 2024
09:30
Minimizing resources for quantum devices with control theory
-
Christiane Koch
(
Freie Universität Berlin
)
Minimizing resources for quantum devices with control theory
Christiane Koch
(
Freie Universität Berlin
)
09:30 - 10:00
Quantum technologies are all about controlling quantum systems. Control is the prerequisite to exploit the two essential elements of quantum physics, non-locality and coherence, for practical applications. This currently faces two major challenges --- to preserve the relevant non-classical features at the level of device operation and to scale the devices up in size. Control theory provides tools for tackling both challenges. On the one hand, controllability analysis aims at answering the question which control targets, states or operations, are accessible. On the other hand, control theory provides methods to derive the actual control fields that implement the desired dynamics. I will discuss how to leverage control theory to minimize resources for quantum devices and thus ease requirements towards scaling up their size. In particular, I will show how controllability analysis allows us to identify the minimum number of local controls required to implement universal quantum computing in an array of coupled qubits. Moreover, I will provide examples for the control of open quantum systems where the environment leads to decoherence but also opens new prospects for control. I will discuss examples for both strategies, with practical applications in Rydberg atoms, trapped ions, and superconducting circuits.
10:00
Topological amplification in driven-dissipative systems
-
Diego Porras
(
CSIC Madrid
)
Topological amplification in driven-dissipative systems
Diego Porras
(
CSIC Madrid
)
10:00 - 10:30
10:30
Coffee Break
Coffee Break
10:30 - 11:00
11:00
Interplay between the phase dynamics and edge states in Josephson junctions of time-reversal invariant topological superconductors
-
Liliana Arrachea
(
Universidad Nacional de San Martín, Buenos Aires, Argentina
)
Interplay between the phase dynamics and edge states in Josephson junctions of time-reversal invariant topological superconductors
Liliana Arrachea
(
Universidad Nacional de San Martín, Buenos Aires, Argentina
)
11:00 - 11:30
Two-dimensional time-reversal invariant topological superconductors (TRITOPS) host a Kramers pair of propagating edge states. Their coupling in a Josephson junction can be described by a Dirac Hamiltonian with a mass term that depends on the phase bias of the junction. Notably, this mass term exhibits different characteristics in junctions between TRITOPS compared with those between a TRITOPS and a non-topological superconductor (S). In the latter case there is an instability towards a state with broken time-reversal symmetry. In this talk, I will briefly outline how these properties lead to a markedly different behavior of the current-phase relation in each type of junction. Additionally, I will discuss the stability of the broken-symmetry state of the TRITOPS-S junction against the phase fluctuations. I will also discuss the effect of fluxons in the junction giving rise to the formation solitons in the phase field. These solitons induce a spatially varying mass for the edge modes, akin to the Jackiw-Rebbi model. Consequently, topological fermionic modes emerge localized at the fluxons. The nature of these modes also depends on the type of junction, being single Majorana fermions in the TRITOPS-S case. Lastly, I will analyze the impact of these localized modes on the dynamics of soliton-antisoliton collisions.
11:30
Informational steady-states and conditional entropy production in continuously monitored systems
-
Mauro Paternostro
(
Queen’s University Belfast
)
Informational steady-states and conditional entropy production in continuously monitored systems
Mauro Paternostro
(
Queen’s University Belfast
)
11:30 - 12:00
I will put forth a unifying formalism for the description of the thermodynamics of continuously monitored systems, where measurements are only performed on the environment connected to a system. I will show, in particular, that the conditional and unconditional entropy production, which quantify the degree of irreversibility of the open system's dynamics, are related to each other by the Holevo quantity and discuss the existence of informational steady-states, i.e. stationary states of a conditional dynamics that are maintained owing to the unbroken acquisition of information. I will illustrate the applicability of such framework through several examples, including the modelling of a recent experiment in the field of cavity optomechanics.
12:00
Closing Remarks
Closing Remarks
12:00 - 12:10