239 citations · 912 across the 23 of their papers we have counts for
23 papers
Eigenvalue crossing as a phase transition in relaxation dynamics
Gianluca Teza, Ran Yaacoby, Oren Raz
When a system's parameter is abruptly changed, a relaxation towards the new equilibrium of the system follows. We show that a crossing between the second and third eigenvalues of t…
On-Site Potential Creates Complexity in Systems with Disordered Coupling
Igor Gershenzon, Bertrand Lacroix-A-Chez-Toine, Oren Raz +2
We calculate the average number of critical points of the energy landscape of a many-body system with disordered two-body interactions and a weak on-site p…
Landau Theory for the Mpemba Effect Through Phase Transitions
Roi Holtzman, Oren Raz
The Mpemba effect describes the situation in which a hot system cools faster than an identical copy that is initiated at a colder temperature. In many of the experimental observati…
Far from equilibrium relaxation in the weak coupling limit
Ran Yaacoby, Oren Raz, Gianluca Teza
It is commonly assumed that a large system, weakly coupled to a thermal environment through its boundaries, relaxes quasistatically towards the new equilibrium even when the temper…
Echo chambers in the Ising model and implications on the mean magnetization
Talia Baravi, Ofer Feinerman, Oren Raz
The echo-chamber effect is a common term in opinion dynamic modeling to describe how a person's opinion might be artificially enhanced as it is reflected back at her through social…
Relaxation shortcuts through boundary coupling
Gianluca Teza, Ran Yaacoby, Oren Raz
When a hot system cools down faster than an equivalent cold one, it exhibits the Mpemba Effect. This counterintuitive phenomenon was observed in several systems including water, ma…
Spectral Analysis of Current Fluctuations in Periodically Driven Stochastic Systems
Bertrand Lacroix-A-Chez-Toine, Oren Raz
Current fluctuations play an important role in non-equilibrium statistical mechanics, and are a key object of interest in both theoretical studies and in practical applications. So…
A comparison between D-wave and a classical approximation algorithm and a heuristic for computing the ground state of an Ising spin glass
Ran Yaacoby, Nathan Schaar, Leon Kellerhals +3
Finding the ground state of an Ising-spin glass on general graphs belongs to the class of NP-hard problems, widely believed to have no efficient polynomial-time algorithms for solv…
Critical dynamics and phase transition of a strongly interacting warm spin-gas
Yahel Horowicz, Or Katz, Oren Raz +1
Phase transitions are emergent phenomena where microscopic interactions drive a disordered system into a collectively ordered phase. Near the boundary between two phases, the syste…
Anyonic-parity-time symmetry in complex-coupled lasers
Geva Arwas, Sagie Gadasi, Igor Gershenzon +3
Non-Hermitian Hamiltonians, and particularly parity-time (PT) and anti-PT symmetric Hamiltonians, play an important role in many branches of physics, from quantum mechanics to opti…
Hamiltonian Memory: An Erasable Classical Bit
Roi Holtzman, Geva Arwas, Oren Raz
Computations implemented on a physical system are fundamentally limited by the laws of physics. A prominent example for a physical law that bounds computations is the Landauer prin…
Mpemba effect in driven granular Maxwell gases
Apurba Biswas, V . V. Prasad, O. Raz +1
Mpemba effect refers to the counterintuitive result that, when quenched to a low temperature, a system at higher temperature may equilibrate faster than one at intermediate tempera…
Exact Mapping Between a Laser Network Loss Rate and the Classical XY Hamiltonian by Laser Loss Control
Igor Gershenzon, Geva Arwas, Sagie Gadasi +4
Recently, there has been growing interest in the utilisation of physical systems as heuristic optimisers for classical spin Hamiltonians. A prominent approach employs gain-dissipat…
Pre-Cooling Strategy Allows Exponentially Faster Heating
Oren Raz, Amit Gal
What is the fastest way to heat a system which is coupled to a temperature controlled oven? The intuitive answer is to use only the hottest temperature available. However, we show…
The Mpemba index and anomalous relaxation
Israel Klich, Oren Raz, Ori Hirschberg +1
The Mpemba effect is a counter-intuitive relaxation phenomenon, where a system prepared at a hot temperature cools down faster than an identical system initiated at a cold temperat…
Anomalous cooling and heating - the Mpemba effect and its inverse
Zhiyue Lu, Oren Raz
Under certain conditions, it takes a shorter time to cool a hot system than to cool the same system initiated at a lower temperature. This phenomenon - the "Mpemba Effect" - is wel…
The discrete sign problem: uniqueness, recovery algorithms and phase retrieval applications
Ben Leshem, Oren Raz, Ariel Jaffe +1
In this paper we consider the following real-valued and finite dimensional specific instance of the 1-D classical phase retrieval problem. Let be an -di…
Geometric Heat Engines Featuring Power that Grows with Efficiency
Oren Raz, Yigit Subaşı, Rami Pugatch
Thermodynamics places a limit on the efficiency of heat engines, but not on their output power or on how the power and efficiency change with the engine's cycle time. In this manus…
Mimicking Nonequilibrium Steady States with Stochastic Pumps
Oren Raz, Yigit Subasi, Christopher Jarzynski
We establish a correspondence between two very general paradigms for systems that persist away from thermal equilibrium. In the first paradigm, a nonequilibrium steady state (NESS)…
Demonstration of fold and cusp catastrophes in an atomic cloud reflected from an optical barrier in the presence of gravity
Serge Rosenblum, Orel Bechler, Itay Shomroni +4
We experimentally demonstrate first-order (fold) and second-order (cusp) catastrophes in the density of an atomic cloud reflected from an optical barrier in the presence of gravity…
Vectorial Phase Retrieval for Linear Characterization of Attosecond Pulses
Oren Raz, Osip Schwartz, Dane Austin +7
The waveforms of attosecond pulses produced by high-harmonic generation carry information on the electronic structure and dynamics in atomic and molecular systems. Current methods…
Shot noise limited characterization of femtosecond light pulses
Osip Schwartz, Oren Raz, Ori Katz +2
Probing the evolution of physical systems at the femto- or attosecond timescale with light requires accurate characterization of ultrashort optical pulses. The time profiles of suc…
The Square Cat
E. Putterman, O. Raz
We present a simple, two dimensional example of a "cat" -- a body with zero angular momentum that can rotate itself with no external forces. This model is used to explain why this…