234 citations · 646 across the 19 of their papers we have counts for
12 papers · 1 filter
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…
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…
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…
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…
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…