Displaying all lectures given by: Subir Sachdev

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

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
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
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

What Can Gauge-Gravity Duality Teach us About Condensed Matter Physics?
Speaker(s): Subir Sachdev
Abstract: TBA
Date: 14/07/2011 - 3:00 pm

Quantum "disordering" magnetic order in insulators, superconductors, and metals
Speaker(s): Subir Sachdev
Abstract: tba
Date: 29/05/2010 - 11:45 am

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

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

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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