75 citations · 483 across the 19 of their papers we have counts for
19 papers
Probing false vacuum decay on a cold-atom gauge-theory quantum simulator
Zi-Hang Zhu, Ying Liu, Gianluca Lagnese +9
In the context of quantum electrodynamics, the decay of false vacuum leads to the production of electron-positron pair, a phenomenon known as the Schwinger effect. In practical exp…
Detecting a long lived false vacuum with quantum quenches
Gianluca Lagnese, Federica Maria Surace, Sid Morampudi +1
Distinguishing whether a system supports alternate low-energy (locally stable) states -- stable (true vacuum) versus metastable (false vacuum) -- by direct observation can be diffi…
Fractional focusing peaks and collective dynamics in two-dimensional Fermi liquids
Adbhut Gupta, Gitansh Kataria, Mani Chandra +6
Carrier transport in materials is often diffusive due to momentum-relaxing scattering with phonons and defects. Suppression of momentum-relaxing scattering can lead to the ballisti…
Proposal to detect emergent gauge field and its Meissner effect in spin liquids using NV Centers
Patrick A. Lee, Sid Morampudi
We show that NV centers could provide distinct signatures of emergent gauge fields in certain phase transitions in spin liquids. We consider the relaxation rate of a diamon…
Searching For Dark Matter with Plasma Haloscopes
Alexander J. Millar, Steven M. Anlage, Rustam Balafendiev +24
We summarise the recent progress of the Axion Longitudinal Plasma HAloscope (ALPHA) Consortium, a new experimental collaboration to build a plasma haloscope to search for axions an…
Exceptional dynamics of interacting spin liquids
Kang Yang, Daniel Varjas, Emil J. Bergholtz +2
We show that interactions in quantum spin liquids can result in non-Hermitian phenomenology that differs qualitatively from mean-field expectations. We demonstrate this in two prom…
Quantum orders in the frustrated Ising model on the bathroom tile lattice
Sumner N. Hearth, Siddhardh C. Morampudi, Chris R. Laumann
We determine the zero and finite temperature phase diagram of the fully frustrated quantum Ising model on the bathroom tile (4-8) lattice. The phase diagram exhibits a wealth of 2+…
The Emergent Fine Structure Constant of Quantum Spin Ice Is Large
Salvatore D. Pace, Siddhardh C. Morampudi, Roderich Moessner +1
Condensed matter systems provide alternative `vacua' exhibiting emergent low-energy properties drastically different from those of the standard model. A case in point is the emerge…
Exceptional Spin Liquids from Couplings to the Environment
Kang Yang, Siddhardh C. Morampudi, Emil J. Bergholtz
We establish the appearance of a qualitatively new type of spin liquid with emergent exceptional points when coupling to the environment. We consider an open system of the Kitaev h…
Hamiltonian Dynamics of a Sum of Interacting Random Matrices
Matteo Bellitti, Siddhardh Morampudi, Chris R. Laumann
In ergodic quantum systems, physical observables have a non-relaxing component if they "overlap" with a conserved quantity. In interacting microscopic models, how to isolate the no…
Spectroscopy of spinons in Coulomb quantum spin liquids
Siddhardh C. Morampudi, Frank Wilczek, Chris R. Laumann
We calculate the effect of the emergent photon on threshold production of spinons in Coulomb spin liquids such as quantum spin ice. The emergent Coulomb interaction modifies…
Universal entanglement of typical states in constrained systems
Siddhardh C. Morampudi, Anushya Chandran, Chris R. Laumann
Local constraints play an important role in the effective description of many quantum systems. Their impact on dynamics and entanglement thermalization are just beginning to be unr…
Many-body systems with random spatially local interactions
Siddhardh C. Morampudi, Chris R. Laumann
We extend random matrix theory to consider randomly interacting spin systems with spatial locality. We develop several methods by which arbitrary correlators may be systematically…
Signatures of fractionalization in spin liquids from interlayer thermal transport
Yochai Werman, Shubhayu Chatterjee, Siddhardh C. Morampudi +1
Quantum spin liquids (QSLs) are intriguing phases of matter possessing fractionalized excitations. Several quasi-two dimensional materials have been proposed as candidate QSLs, but…
Clustering in Hilbert space of a quantum optimization problem
S. C. Morampudi, B. Hsu, S. L. Sondhi +2
The solution space of many classical optimization problems breaks up into clusters which are extensively distant from one another in the Hamming metric. Here, we show that an analo…
Statistics of fractionalized excitations through threshold spectroscopy
Siddhardh C. Morampudi, Ari M. Turner, Frank Pollmann +1
We show that the anyonic statistics of fractionalized excitations display characteristic signatures in threshold spectroscopic measurements. Drawing motivation from topologically o…
When a local Hamiltonian must be frustration-free
Or Sattath, Siddhardh C. Morampudi, Christopher R. Laumann +1
A broad range of quantum optimisation problems can be phrased as the question whether a specific system has a ground state at zero energy, i.e.\ whether its Hamiltonian is frustrat…
Double Semion Phase in an Exactly Solvable Quantum Dimer Model on the Kagome Lattice
Oliver Buerschaper, Siddhardh C. Morampudi, Frank Pollmann
Quantum dimer models typically arise in various low energy theories like those of frustrated antiferromagnets. We introduce a quantum dimer model on the kagome lattice which stabil…
Numerical study of a transition between Z2 topologically ordered phases
Siddhardh C. Morampudi, Curt von Keyserlingk, Frank Pollmann
Distinguishing different topologically ordered phases and characterizing phase transitions between them is a difficult task due to the absence of local order parameters. In this pa…