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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Subir Sachdev


PIRSA:15080122  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Bekenstein-Hawking entropy and strange metals
Speaker(s): Subir Sachdev
Abstract:
Date: 20/08/2015 - 5:00 pm

PIRSA:15070060  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The non-superconducting states of the cuprates
Speaker(s): Subir Sachdev
Abstract: The most interesting states of the cuprate compounds are not the superconductors with high critical temperatures. Instead, the novelty lies primarily in the higher temperature metallic "normal" states from which the superconductors descend, and in competing low temperature states with density wave o... read more
Date: 07/07/2015 - 10:00 am

PIRSA:15060024  ( MP4 Medium Res , PDF ) Which Format?
Exploring Quantum Matter with the High Temperature Superconductors
Speaker(s): Subir Sachdev
Abstract: Apart from high temperature superconductivity, the cuprate compounds also display fascinating new types of metallic states from which the superconductivity descends. These metals have served as a remarkable laboratory for modern ideas on long-range quantum entanglement and its consequences for the... read more
Date: 23/06/2015 - 9:50 am
Collection: Convergence

PIRSA:15060022  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Bekenstein-Hawking entropy from strange metals
Speaker(s): Subir Sachdev
Abstract:

The properties of a strange metal fermion model with infinite-range

interactions turn out to be closely related to those of charged black holes

with AdS2 horizons. I show that a microscopic computation of the ground

state entropy density of the fermion model yields p... read more

Date: 16/06/2015 - 12:00 pm

PIRSA:14100080  ( MP4 Medium Res , PDF ) Which Format?
Quantum Entanglement and Superconductivity
Speaker(s): Subir Sachdev
Abstract: Einstein called it “spooky action at a distance.” Entanglement is a counterintuitive feature of quantum theory by which two particles are deeply correlated even when separated by vast distances, such that a measurement of one particle instantaneously determines the state of another. Remark... read more
Date: 01/10/2014 - 7:00 pm

PIRSA:14050109  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Quantum matter without quasiparticles
Speaker(s): Subir Sachdev
Abstract: Modern materials abound in systems to which the quasiparticle picture does not apply, and developing their theoretical description remains an important challenge in condensed matter physics. I will describe recent progress in understanding the dynamics of two systems without quasiparticles: (i... read more
Date: 29/05/2014 - 10:30 am

Entangled states of quantum matter
Speaker(s): Subir Sachdev
Abstract: Theorists have been studying and classifying entanglement in many-particle quantum states for many years. In the past few years, experiments on such states have finally appeared, generating much excitement. I will describe experimental observations on magnetic insulators, ultracold atoms, and ... read more
Date: 08/05/2013 - 2:00 pm
Series: Colloquium

PIRSA:12070010  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Entanglement, Holography, and the Quantum Phases of Matter
Speaker(s): Subir Sachdev
Abstract:
Date: 13/07/2012 - 2:30 pm

PIRSA:12070009  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Entangling Superconductivity and antiferromagnetism: Quantum Monte Carlo without the sign Problem
Speaker(s): Subir Sachdev
Abstract: It has long been known that a metal near an instability to antiferromagnetism also has a weak-coupling Cooper instability to spin-singlet d-wave-like superconductivity. However, the theory of the antiferromagnetic quantum critical point flows to strong-coupling in two spatial dimensions,... read more
Date: 11/07/2012 - 2:30 pm

PIRSA:11120077  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Researcher Presentation: Subir Sachdev
Speaker(s): Subir Sachdev
Abstract:
Date: 14/12/2011 - 4:00 pm

PIRSA:11120076  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Compressible Quantum Liquids: Field Theory Versus Holography
Speaker(s): Subir Sachdev
Abstract: The description of non-Fermi liquid metals is one of the central problems in the theory of correlated electron systems. I present a holographic theory which builds on general features of the thermal entropy density and the entanglement entropy. Remarkable connections emerge between the holographic a... read more
Date: 13/12/2011 - 2:30 pm

PIRSA:11070047  ( MP4 Medium Res , MP3 , PDF ) Which Format?
What Can Gauge-Gravity Duality Teach us About Condensed Matter Physics?
Speaker(s): Subir Sachdev
Abstract: TBA
Date: 14/07/2011 - 3:00 pm

PIRSA:10050089  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Quantum "disordering" magnetic order in insulators, superconductors, and metals
Speaker(s): Subir Sachdev
Abstract: tba
Date: 29/05/2010 - 11:45 am

PIRSA:09110118  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Strong coupling problems in condensed matter and the AdS/CFT correspondence
Speaker(s): Subir Sachdev
Abstract: I will survey some open problems posed by experiments on condensed matter systems, such as the high temperature superconductors. I will argue that their solutions require analyses of strong-coupling regimes which cannot be addressed by conventional field-theoretic means. I will describe insights dra... read more
Date: 11/11/2009 - 12:00 pm

PIRSA:08040031  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Nodal Quasiparticles and Spin and Charge Order in the Cuprate Superconductors
Speaker(s): Subir Sachdev
Abstract: I will discuss the interplay between the fermionic nodal quasiparticles of a d-wave superconductor and the various spin and charge orders that have been observed in the cuprate superconductors. Fluctuations of a composite 'nematic' order are identified as the dominant source of inelastic scattering ... read more
Date: 24/04/2008 - 9:00 am

PIRSA:08040006  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Quantum criticality and black holes
Speaker(s): Subir Sachdev
Abstract: I will describe antiferromagnets and superconductors near quantum phase transitions. There is a remarkable analogy between their dynamics and the holographic description of Hawking radiation from black holes. I will show how insights from this analogy have shed light on experiments on the cuprate hi... read more
Date: 23/04/2008 - 2:00 pm
Series: Colloquium
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