234 citations · 646 across the 19 of their papers we have counts for
19 papers
Information dynamics and symmetry breaking in generic monitored -symmetric open quantum systems
Jacob Hauser, Ali Lavasani, Sagar Vijay +1
We investigate the steady-state phases of generic -symmetric monitored, open quantum dynamics. We describe the phases systematically in terms of both information-theo…
Persistent Topological Negativity in a High-Temperature Mixed-State
Yonna Kim, Ali Lavasani, Sagar Vijay
We study the entanglement structure of the Greenberger-Horne-Zeilinger (GHZ) state as it thermalizes under a strongly-symmetric quantum channel describing the Metropolis-Hastings d…
Information dynamics in decohered quantum memory with repeated syndrome measurements: a dual approach
Jacob Hauser, Yimu Bao, Shengqi Sang +3
Measurements can detect errors in a decohered quantum memory allowing active error correction to increase the memory time. Previous understanding of this mechanism has focused on e…
On stability of k-local quantum phases of matter
Ali Lavasani, Michael J. Gullans, Victor V. Albert +1
The current theoretical framework for topological phases of matter is based on the thermodynamic limit of a system with geometrically local interactions. A natural question is to w…
The Stability of Gapped Quantum Matter and Error-Correction with Adiabatic Noise
Ali Lavasani, Sagar Vijay
The codespace of a quantum error-correcting code can often be identified with the degenerate ground-space within a gapped phase of quantum matter. We argue that the stability of su…
Universality of the cross entropy in symmetric monitored quantum circuits
Maria Tikhanovskaya, Ali Lavasani, Matthew P. A. Fisher +1
The linear cross-entropy (LXE) has been recently proposed as a scalable probe of the measurement-driven phase transition between volume- and area-law-entangled phases of pure-state…
Stable measurement-induced Floquet enriched topological order
DinhDuy Vu, Ali Lavasani, Jong Yeon Lee +1
The Floquet code utilizes a periodic sequence of two-qubit measurements to realize the topological order. After each measurement round, the instantaneous stabilizer group can be ma…
Non-local finite-depth circuits for constructing SPT states and quantum cellular automata
David T. Stephen, Arpit Dua, Ali Lavasani +1
Whether a given target state can be prepared by starting with a simple product state and acting with a finite-depth quantum circuit is a key question in condensed matter physics an…
Monitored Quantum Dynamics and the Kitaev Spin Liquid
Ali Lavasani, Zhu-Xi Luo, Sagar Vijay
Quantum circuit dynamics with local projective measurements can realize a rich spectrum of entangled states of quantum matter. Motivated by the physics of the Kitaev quantum spin l…
Neural-Network Decoders for Measurement Induced Phase Transitions
Hossein Dehghani, Ali Lavasani, Mohammad Hafezi +1
Open quantum systems have been shown to host a plethora of exotic dynamical phases. Measurement-induced entanglement phase transitions in monitored quantum systems are a striking e…
Irreducible multi-partite correlations as an order parameter for k-local nontrivial states
Yahya Alavirad, Ali Lavasani
Geometrically nontrivial quantum states can be defined as states that cannot be prepared by a constant depth geometrically local unitary circuit starting from a product state. Howe…
Topological order and criticality in (2+1)D monitored random quantum circuits
Ali Lavasani, Yahya Alavirad, Maissam Barkeshli
It has recently been discovered that random quantum circuits provide an avenue to realize rich entanglement phase diagrams, which are hidden to standard expectation values of opera…
Measurement-induced topological entanglement transitions in symmetric random quantum circuits
Ali Lavasani, Yahya Alavirad, Maissam Barkeshli
We study a class of (1+1)D symmetric random quantum circuits with two competing types of measurements in addition to random unitary dynamics. The circuit exhibits a rich phase diag…
Universal logical gates with constant overhead: instantaneous Dehn twists for hyperbolic quantum codes
Ali Lavasani, Guanyu Zhu, Maissam Barkeshli
A basic question in the theory of fault-tolerant quantum computation is to understand the fundamental resource costs for performing a universal logical set of gates on encoded qubi…
Wiedemann-Franz law and Fermi liquids
Ali Lavasani, Daniel Bulmash, Sankar Das Sarma
We consider in depth the applicability of the Wiedemann-Franz (WF) law, namely that the electronic thermal conductivity () is proportional to the product of the absolute tempera…
Scrambling in the Dicke model
Yahya Alavirad, Ali Lavasani
The scrambling rate associated with the exponential growth of out-of-time-ordered correlators can be used to characterize quantum chaos. Here we use the Majorana Fermion repr…
Instantaneous braids and Dehn twists in topologically ordered states
Guanyu Zhu, Ali Lavasani, Maissam Barkeshli
A defining feature of topologically ordered states of matter is the existence of locally indistinguishable states on spaces with non-trivial topology. These degenerate states form…
Universal Logical Gates on Topologically Encoded Qubits via Constant-Depth Unitary Circuits
Guanyu Zhu, Ali Lavasani, Maissam Barkeshli
A fundamental question in the theory of quantum computation is to understand the ultimate space-time resource costs for performing a universal set of logical quantum gates to arbit…
Low overhead Clifford gates from joint measurements in surface, color, and hyperbolic codes
Ali Lavasani, Maissam Barkeshli
One of the most promising routes towards fault-tolerant quantum computation utilizes topological quantum error correcting codes, such as the surface code. Logical qu…